test: add unit tests for DAOs

build: excludes html files from test coverage report
fix: removes console.log
2026-01-18 18:36:34 -03:00 · 2026-01-18 17:59:59 -03:00 · 2026-01-18 15:13:05 -03:00 · 2026-01-18 00:32:28 -03:00 · 2026-01-17 22:56:19 -03:00 · 2026-01-17 22:46:53 -03:00
58 changed files with 2900 additions and 56 deletions
--- a/angular.json
+++ b/angular.json
@@ -27,6 +27,16 @@
              {
                "glob": "**/*",
                "input": "public"
+              },
+              {
+                "glob": "**/*.js",
+                "input": "./node_modules/angular-web-sqlite/src/lib/assets",
+                "output": "./sqlite-client/"
+              },
+              {
+                "glob": "**/*",
+                "input": "./node_modules/@sqlite.org/sqlite-wasm/sqlite-wasm/jswasm/",
+                "output": "./sqlite-client/"
              }
            ],
            "styles": [
@@ -67,10 +77,19 @@
              "buildTarget": "groceries-price-tracker:build:development"
            }
          },
-          "defaultConfiguration": "development"
+          "defaultConfiguration": "development",
+          "options": {
+            "headers": {
+              "Cross-Origin-Opener-Policy": "same-origin",
+              "Cross-Origin-Embedder-Policy": "require-corp"
+            }
+          }
        },
        "test": {
-          "builder": "@angular/build:unit-test"
+          "builder": "@angular/build:unit-test",
+          "options": {
+            "coverageExclude": ["**/*.html"]
+          }
        }
      }
    }
--- a/cert/server.crt
+++ b/cert/server.crt
@@ -0,0 +1,25 @@
+-----BEGIN CERTIFICATE-----
+MIIESzCCAzOgAwIBAgIUeHJl5gcLEDqZCFSNISmGK1L7HQswDQYJKoZIhvcNAQEL
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+zaoVfNI3cyUIFDQxFNmr8uyZc9bQ+boeZ9NB1yKIWE+0RP4LrznuirGtCpHZiuo=
+-----END CERTIFICATE-----
--- a/cert/server.key
+++ b/cert/server.key
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvAIBADANBgkqhkiG9w0BAQEFAASCBKYwggSiAgEAAoIBAQCc3kSl+tAIncdn
+/VXo/SWoCBtwd3TzLeYoFQm8PK62upOf5FB9FcpOEy3yPVAS1+094tHN6WGT2gZt
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+ZA5FJdXg9HW/iJMhuLyh6A==
+-----END PRIVATE KEY-----
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,6 +14,7 @@
        "@angular/forms": "^21.0.0",
        "@angular/platform-browser": "^21.0.0",
        "@angular/router": "^21.0.0",
+        "angular-web-sqlite": "^1.0.34",
        "rxjs": "~7.8.0",
        "tslib": "^2.3.0"
      },
@@ -21,6 +22,7 @@
        "@angular/build": "^21.0.4",
        "@angular/cli": "^21.0.4",
        "@angular/compiler-cli": "^21.0.0",
+        "@vitest/coverage-v8": "^4.0.17",
        "jsdom": "^27.1.0",
        "typescript": "~5.9.2",
        "vitest": "^4.0.8"
@@ -948,6 +950,16 @@
        "node": ">=6.9.0"
      }
    },
+    "node_modules/@bcoe/v8-coverage": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@bcoe/v8-coverage/-/v8-coverage-1.0.2.tgz",
+      "integrity": "sha512-6zABk/ECA/QYSCQ1NGiVwwbQerUCZ+TQbp64Q3AgmfNvurHH0j8TtXa1qbShXA6qqkpAj4V5W8pP6mLe1mcMqA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
    "node_modules/@csstools/color-helpers": {
      "version": "5.1.0",
      "resolved": "https://registry.npmjs.org/@csstools/color-helpers/-/color-helpers-5.1.0.tgz",
@@ -1927,6 +1939,41 @@
        }
      }
    },
+    "node_modules/@ionic/angular": {
+      "version": "8.7.15",
+      "resolved": "https://registry.npmjs.org/@ionic/angular/-/angular-8.7.15.tgz",
+      "integrity": "sha512-2FFmOCoE3CRHR/WAsx+DX084ywxCNEdqrDuqy0iUmi1jbXrYFcC3xnbvBLKRsQtN56nFLS07DkL6wLCCOY7M4A==",
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@ionic/core": "8.7.15",
+        "ionicons": "^8.0.13",
+        "jsonc-parser": "^3.0.0",
+        "tslib": "^2.3.0"
+      },
+      "peerDependencies": {
+        "@angular/core": ">=16.0.0",
+        "@angular/forms": ">=16.0.0",
+        "@angular/router": ">=16.0.0",
+        "rxjs": ">=7.5.0",
+        "zone.js": ">=0.13.0"
+      }
+    },
+    "node_modules/@ionic/core": {
+      "version": "8.7.15",
+      "resolved": "https://registry.npmjs.org/@ionic/core/-/core-8.7.15.tgz",
+      "integrity": "sha512-u1w9c6dx2iuatXIW5X1JY0ighDhQPjBwOHZsrOcnpm891pktuEjJDdyhDulWFa6kKVkXw1q7khwxXBEurvKc2g==",
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@stencil/core": "4.38.0",
+        "ionicons": "^8.0.13",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">= 16"
+      }
+    },
    "node_modules/@isaacs/balanced-match": {
      "version": "4.0.1",
      "resolved": "https://registry.npmjs.org/@isaacs/balanced-match/-/balanced-match-4.0.1.tgz",
@@ -3899,12 +3946,45 @@
        "node": "^20.17.0 || >=22.9.0"
      }
    },
+    "node_modules/@sqlite.org/sqlite-wasm": {
+      "version": "3.44.0-build2",
+      "resolved": "https://registry.npmjs.org/@sqlite.org/sqlite-wasm/-/sqlite-wasm-3.44.0-build2.tgz",
+      "integrity": "sha512-zFfqHoYxuGQ15+A9W00JGQEfQ+f1b+NNpZRD98I31G0x7es+IiGIh8n52vBoub+q9bZLW++Xa6T1QXuw4eGSDQ==",
+      "license": "Apache-2.0",
+      "bin": {
+        "sqlite-wasm": "bin/index.js"
+      }
+    },
    "node_modules/@standard-schema/spec": {
      "version": "1.1.0",
      "resolved": "https://registry.npmjs.org/@standard-schema/spec/-/spec-1.1.0.tgz",
      "integrity": "sha512-l2aFy5jALhniG5HgqrD6jXLi/rUWrKvqN/qJx6yoJsgKhblVd+iqqU4RCXavm/jPityDo5TCvKMnpjKnOriy0w==",
      "license": "MIT"
    },
+    "node_modules/@stencil/core": {
+      "version": "4.38.0",
+      "resolved": "https://registry.npmjs.org/@stencil/core/-/core-4.38.0.tgz",
+      "integrity": "sha512-oC3QFKO0X1yXVvETgc8OLY525MNKhn9vISBrbtKnGoPlokJ6rI8Vk1RK22TevnNrHLI4SExNLbcDnqilKR35JQ==",
+      "license": "MIT",
+      "peer": true,
+      "bin": {
+        "stencil": "bin/stencil"
+      },
+      "engines": {
+        "node": ">=16.0.0",
+        "npm": ">=7.10.0"
+      },
+      "optionalDependencies": {
+        "@rollup/rollup-darwin-arm64": "4.34.9",
+        "@rollup/rollup-darwin-x64": "4.34.9",
+        "@rollup/rollup-linux-arm64-gnu": "4.34.9",
+        "@rollup/rollup-linux-arm64-musl": "4.34.9",
+        "@rollup/rollup-linux-x64-gnu": "4.34.9",
+        "@rollup/rollup-linux-x64-musl": "4.34.9",
+        "@rollup/rollup-win32-arm64-msvc": "4.34.9",
+        "@rollup/rollup-win32-x64-msvc": "4.34.9"
+      }
+    },
    "node_modules/@tufjs/canonical-json": {
      "version": "2.0.0",
      "resolved": "https://registry.npmjs.org/@tufjs/canonical-json/-/canonical-json-2.0.0.tgz",
@@ -3978,17 +4058,48 @@
        "vite": "^6.0.0 || ^7.0.0"
      }
    },
+    "node_modules/@vitest/coverage-v8": {
+      "version": "4.0.17",
+      "resolved": "https://registry.npmjs.org/@vitest/coverage-v8/-/coverage-v8-4.0.17.tgz",
+      "integrity": "sha512-/6zU2FLGg0jsd+ePZcwHRy3+WpNTBBhDY56P4JTRqUN/Dp6CvOEa9HrikcQ4KfV2b2kAHUFB4dl1SuocWXSFEw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@bcoe/v8-coverage": "^1.0.2",
+        "@vitest/utils": "4.0.17",
+        "ast-v8-to-istanbul": "^0.3.10",
+        "istanbul-lib-coverage": "^3.2.2",
+        "istanbul-lib-report": "^3.0.1",
+        "istanbul-reports": "^3.2.0",
+        "magicast": "^0.5.1",
+        "obug": "^2.1.1",
+        "std-env": "^3.10.0",
+        "tinyrainbow": "^3.0.3"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "@vitest/browser": "4.0.17",
+        "vitest": "4.0.17"
+      },
+      "peerDependenciesMeta": {
+        "@vitest/browser": {
+          "optional": true
+        }
+      }
+    },
    "node_modules/@vitest/expect": {
-      "version": "4.0.16",
-      "resolved": "https://registry.npmjs.org/@vitest/expect/-/expect-4.0.16.tgz",
-      "integrity": "sha512-eshqULT2It7McaJkQGLkPjPjNph+uevROGuIMJdG3V+0BSR2w9u6J9Lwu+E8cK5TETlfou8GRijhafIMhXsimA==",
+      "version": "4.0.17",
+      "resolved": "https://registry.npmjs.org/@vitest/expect/-/expect-4.0.17.tgz",
+      "integrity": "sha512-mEoqP3RqhKlbmUmntNDDCJeTDavDR+fVYkSOw8qRwJFaW/0/5zA9zFeTrHqNtcmwh6j26yMmwx2PqUDPzt5ZAQ==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
        "@standard-schema/spec": "^1.0.0",
        "@types/chai": "^5.2.2",
-        "@vitest/spy": "4.0.16",
-        "@vitest/utils": "4.0.16",
+        "@vitest/spy": "4.0.17",
+        "@vitest/utils": "4.0.17",
        "chai": "^6.2.1",
        "tinyrainbow": "^3.0.3"
      },
@@ -3997,13 +4108,13 @@
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    "node_modules/@vitest/mocker": {
-      "version": "4.0.16",
-      "resolved": "https://registry.npmjs.org/@vitest/mocker/-/mocker-4.0.16.tgz",
-      "integrity": "sha512-yb6k4AZxJTB+q9ycAvsoxGn+j/po0UaPgajllBgt1PzoMAAmJGYFdDk0uCcRcxb3BrME34I6u8gHZTQlkqSZpg==",
+      "version": "4.0.17",
+      "resolved": "https://registry.npmjs.org/@vitest/mocker/-/mocker-4.0.17.tgz",
+      "integrity": "sha512-+ZtQhLA3lDh1tI2wxe3yMsGzbp7uuJSWBM1iTIKCbppWTSBN09PUC+L+fyNlQApQoR+Ps8twt2pbSSXg2fQVEQ==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@vitest/spy": "4.0.16",
+        "@vitest/spy": "4.0.17",
        "estree-walker": "^3.0.3",
        "magic-string": "^0.30.21"
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@@ -4034,9 +4145,9 @@
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    },
    "node_modules/@vitest/pretty-format": {
-      "version": "4.0.16",
-      "resolved": "https://registry.npmjs.org/@vitest/pretty-format/-/pretty-format-4.0.16.tgz",
-      "integrity": "sha512-eNCYNsSty9xJKi/UdVD8Ou16alu7AYiS2fCPRs0b1OdhJiV89buAXQLpTbe+X8V9L6qrs9CqyvU7OaAopJYPsA==",
+      "version": "4.0.17",
+      "resolved": "https://registry.npmjs.org/@vitest/pretty-format/-/pretty-format-4.0.17.tgz",
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      "dev": true,
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@@ -4047,13 +4158,13 @@
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    "node_modules/@vitest/runner": {
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-      "resolved": "https://registry.npmjs.org/@vitest/runner/-/runner-4.0.16.tgz",
-      "integrity": "sha512-VWEDm5Wv9xEo80ctjORcTQRJ539EGPB3Pb9ApvVRAY1U/WkHXmmYISqU5E79uCwcW7xYUV38gwZD+RV755fu3Q==",
+      "version": "4.0.17",
+      "resolved": "https://registry.npmjs.org/@vitest/runner/-/runner-4.0.17.tgz",
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      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@vitest/utils": "4.0.16",
+        "@vitest/utils": "4.0.17",
        "pathe": "^2.0.3"
      },
      "funding": {
@@ -4061,13 +4172,13 @@
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    "node_modules/@vitest/snapshot": {
-      "version": "4.0.16",
-      "resolved": "https://registry.npmjs.org/@vitest/snapshot/-/snapshot-4.0.16.tgz",
-      "integrity": "sha512-sf6NcrYhYBsSYefxnry+DR8n3UV4xWZwWxYbCJUt2YdvtqzSPR7VfGrY0zsv090DAbjFZsi7ZaMi1KnSRyK1XA==",
+      "version": "4.0.17",
+      "resolved": "https://registry.npmjs.org/@vitest/snapshot/-/snapshot-4.0.17.tgz",
+      "integrity": "sha512-npPelD7oyL+YQM2gbIYvlavlMVWUfNNGZPcu0aEUQXt7FXTuqhmgiYupPnAanhKvyP6Srs2pIbWo30K0RbDtRQ==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@vitest/pretty-format": "4.0.16",
+        "@vitest/pretty-format": "4.0.17",
        "magic-string": "^0.30.21",
        "pathe": "^2.0.3"
      },
@@ -4086,9 +4197,9 @@
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    },
    "node_modules/@vitest/spy": {
-      "version": "4.0.16",
-      "resolved": "https://registry.npmjs.org/@vitest/spy/-/spy-4.0.16.tgz",
-      "integrity": "sha512-4jIOWjKP0ZUaEmJm00E0cOBLU+5WE0BpeNr3XN6TEF05ltro6NJqHWxXD0kA8/Zc8Nh23AT8WQxwNG+WeROupw==",
+      "version": "4.0.17",
+      "resolved": "https://registry.npmjs.org/@vitest/spy/-/spy-4.0.17.tgz",
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      "dev": true,
      "license": "MIT",
      "funding": {
@@ -4096,13 +4207,13 @@
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    },
    "node_modules/@vitest/utils": {
-      "version": "4.0.16",
-      "resolved": "https://registry.npmjs.org/@vitest/utils/-/utils-4.0.16.tgz",
-      "integrity": "sha512-h8z9yYhV3e1LEfaQ3zdypIrnAg/9hguReGZoS7Gl0aBG5xgA410zBqECqmaF/+RkTggRsfnzc1XaAHA6bmUufA==",
+      "version": "4.0.17",
+      "resolved": "https://registry.npmjs.org/@vitest/utils/-/utils-4.0.17.tgz",
+      "integrity": "sha512-RG6iy+IzQpa9SB8HAFHJ9Y+pTzI+h8553MrciN9eC6TFBErqrQaTas4vG+MVj8S4uKk8uTT2p0vgZPnTdxd96w==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@vitest/pretty-format": "4.0.16",
+        "@vitest/pretty-format": "4.0.17",
        "tinyrainbow": "^3.0.3"
      },
      "funding": {
@@ -4211,6 +4322,22 @@
        "node": ">= 14.0.0"
      }
    },
+    "node_modules/angular-web-sqlite": {
+      "version": "1.0.34",
+      "resolved": "https://registry.npmjs.org/angular-web-sqlite/-/angular-web-sqlite-1.0.34.tgz",
+      "integrity": "sha512-OfV/vA8FEBfb2SjbPB5529ZcjalAUf6WiI+RZcW3V/N1OgRNbM7HrxmIuYJCQ2cm8ZYO6LgOQRmN+ufeAIdM1g==",
+      "hasInstallScript": true,
+      "license": "MIT",
+      "dependencies": {
+        "@sqlite.org/sqlite-wasm": "3.44.0-build2",
+        "tslib": "^2.6.2"
+      },
+      "peerDependencies": {
+        "@angular/common": "13.x || 14.x || 15.x || 16.x || 17.x || 18.x || 19.x || 20.x || 21.x || 22.x",
+        "@angular/core": "13.x || 14.x || 15.x || 16.x || 17.x || 18.x || 19.x || 20.x || 21.x || 22.x",
+        "@ionic/angular": "5.x || 6.x || 7.x || 8.x"
+      }
+    },
    "node_modules/ansi-escapes": {
      "version": "7.2.0",
      "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-7.2.0.tgz",
@@ -4263,6 +4390,25 @@
        "node": ">=12"
      }
    },
+    "node_modules/ast-v8-to-istanbul": {
+      "version": "0.3.10",
+      "resolved": "https://registry.npmjs.org/ast-v8-to-istanbul/-/ast-v8-to-istanbul-0.3.10.tgz",
+      "integrity": "sha512-p4K7vMz2ZSk3wN8l5o3y2bJAoZXT3VuJI5OLTATY/01CYWumWvwkUw0SqDBnNq6IiTO3qDa1eSQDibAV8g7XOQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/trace-mapping": "^0.3.31",
+        "estree-walker": "^3.0.3",
+        "js-tokens": "^9.0.1"
+      }
+    },
+    "node_modules/ast-v8-to-istanbul/node_modules/js-tokens": {
+      "version": "9.0.1",
+      "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-9.0.1.tgz",
+      "integrity": "sha512-mxa9E9ITFOt0ban3j6L5MpjwegGz6lBQmM1IJkWeBZGcMxto50+eWdjC/52xDbS2vy0k7vIMK0Fe2wfL9OQSpQ==",
+      "dev": true,
+      "license": "MIT"
+    },
    "node_modules/baseline-browser-mapping": {
      "version": "2.9.11",
      "resolved": "https://registry.npmjs.org/baseline-browser-mapping/-/baseline-browser-mapping-2.9.11.tgz",
@@ -5539,6 +5685,16 @@
      "dev": true,
      "license": "ISC"
    },
+    "node_modules/has-flag": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
+      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=8"
+      }
+    },
    "node_modules/has-symbols": {
      "version": "1.1.0",
      "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.1.0.tgz",
@@ -5601,6 +5757,13 @@
        "node": "^20.19.0 || ^22.12.0 || >=24.0.0"
      }
    },
+    "node_modules/html-escaper": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/html-escaper/-/html-escaper-2.0.2.tgz",
+      "integrity": "sha512-H2iMtd0I4Mt5eYiapRdIDjp+XzelXQ0tFE4JS7YFwFevXXMmOp9myNrUvCg0D6ws8iqkRPBfKHgbwig1SmlLfg==",
+      "dev": true,
+      "license": "MIT"
+    },
    "node_modules/htmlparser2": {
      "version": "10.0.0",
      "resolved": "https://registry.npmjs.org/htmlparser2/-/htmlparser2-10.0.0.tgz",
@@ -5754,6 +5917,16 @@
        "node": "^18.17.0 || >=20.5.0"
      }
    },
+    "node_modules/ionicons": {
+      "version": "8.0.13",
+      "resolved": "https://registry.npmjs.org/ionicons/-/ionicons-8.0.13.tgz",
+      "integrity": "sha512-2QQVyG2P4wszne79jemMjWYLp0DBbDhr4/yFroPCxvPP1wtMxgdIV3l5n+XZ5E9mgoXU79w7yTWpm2XzJsISxQ==",
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@stencil/core": "^4.35.3"
+      }
+    },
    "node_modules/ip-address": {
      "version": "10.1.0",
      "resolved": "https://registry.npmjs.org/ip-address/-/ip-address-10.1.0.tgz",
@@ -5916,6 +6089,35 @@
        "node": ">=10"
      }
    },
+    "node_modules/istanbul-lib-report": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-report/-/istanbul-lib-report-3.0.1.tgz",
+      "integrity": "sha512-GCfE1mtsHGOELCU8e/Z7YWzpmybrx/+dSTfLrvY8qRmaY6zXTKWn6WQIjaAFw069icm6GVMNkgu0NzI4iPZUNw==",
+      "dev": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "istanbul-lib-coverage": "^3.0.0",
+        "make-dir": "^4.0.0",
+        "supports-color": "^7.1.0"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/istanbul-reports": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-3.2.0.tgz",
+      "integrity": "sha512-HGYWWS/ehqTV3xN10i23tkPkpH46MLCIMFNCaaKNavAXTF1RkqxawEPtnjnGZ6XKSInBKkiOA5BKS+aZiY3AvA==",
+      "dev": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "html-escaper": "^2.0.0",
+        "istanbul-lib-report": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
    "node_modules/jose": {
      "version": "6.1.3",
      "resolved": "https://registry.npmjs.org/jose/-/jose-6.1.3.tgz",
@@ -6020,7 +6222,6 @@
      "version": "3.3.1",
      "resolved": "https://registry.npmjs.org/jsonc-parser/-/jsonc-parser-3.3.1.tgz",
      "integrity": "sha512-HUgH65KyejrUFPvHFPbqOY0rsFip3Bo5wb4ngvdi1EpCYWUQDC5V+Y7mZws+DLkr4M//zQJoanu1SP+87Dv1oQ==",
-      "dev": true,
      "license": "MIT"
    },
    "node_modules/jsonparse": {
@@ -6208,6 +6409,34 @@
        "@jridgewell/sourcemap-codec": "^1.5.5"
      }
    },
+    "node_modules/magicast": {
+      "version": "0.5.1",
+      "resolved": "https://registry.npmjs.org/magicast/-/magicast-0.5.1.tgz",
+      "integrity": "sha512-xrHS24IxaLrvuo613F719wvOIv9xPHFWQHuvGUBmPnCA/3MQxKI3b+r7n1jAoDHmsbC5bRhTZYR77invLAxVnw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/parser": "^7.28.5",
+        "@babel/types": "^7.28.5",
+        "source-map-js": "^1.2.1"
+      }
+    },
+    "node_modules/make-dir": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-4.0.0.tgz",
+      "integrity": "sha512-hXdUTZYIVOt1Ex//jAQi+wTZZpUpwBj/0QsOzqegb3rGMMeJiSEu5xLHnYfBrRV4RH2+OCSOO95Is/7x1WJ4bw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "semver": "^7.5.3"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
    "node_modules/make-fetch-happen": {
      "version": "15.0.3",
      "resolved": "https://registry.npmjs.org/make-fetch-happen/-/make-fetch-happen-15.0.3.tgz",
@@ -7983,6 +8212,19 @@
        "url": "https://github.com/chalk/strip-ansi?sponsor=1"
      }
    },
+    "node_modules/supports-color": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "has-flag": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
    "node_modules/supports-preserve-symlinks-flag": {
      "version": "1.0.0",
      "resolved": "https://registry.npmjs.org/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz",
@@ -8862,19 +9104,19 @@
      }
    },
    "node_modules/vitest": {
-      "version": "4.0.16",
-      "resolved": "https://registry.npmjs.org/vitest/-/vitest-4.0.16.tgz",
-      "integrity": "sha512-E4t7DJ9pESL6E3I8nFjPa4xGUd3PmiWDLsDztS2qXSJWfHtbQnwAWylaBvSNY48I3vr8PTqIZlyK8TE3V3CA4Q==",
+      "version": "4.0.17",
+      "resolved": "https://registry.npmjs.org/vitest/-/vitest-4.0.17.tgz",
+      "integrity": "sha512-FQMeF0DJdWY0iOnbv466n/0BudNdKj1l5jYgl5JVTwjSsZSlqyXFt/9+1sEyhR6CLowbZpV7O1sCHrzBhucKKg==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@vitest/expect": "4.0.16",
-        "@vitest/mocker": "4.0.16",
-        "@vitest/pretty-format": "4.0.16",
-        "@vitest/runner": "4.0.16",
-        "@vitest/snapshot": "4.0.16",
-        "@vitest/spy": "4.0.16",
-        "@vitest/utils": "4.0.16",
+        "@vitest/expect": "4.0.17",
+        "@vitest/mocker": "4.0.17",
+        "@vitest/pretty-format": "4.0.17",
+        "@vitest/runner": "4.0.17",
+        "@vitest/snapshot": "4.0.17",
+        "@vitest/spy": "4.0.17",
+        "@vitest/utils": "4.0.17",
        "es-module-lexer": "^1.7.0",
        "expect-type": "^1.2.2",
        "magic-string": "^0.30.21",
@@ -8902,10 +9144,10 @@
        "@edge-runtime/vm": "*",
        "@opentelemetry/api": "^1.9.0",
        "@types/node": "^20.0.0 || ^22.0.0 || >=24.0.0",
-        "@vitest/browser-playwright": "4.0.16",
-        "@vitest/browser-preview": "4.0.16",
-        "@vitest/browser-webdriverio": "4.0.16",
-        "@vitest/ui": "4.0.16",
+        "@vitest/browser-playwright": "4.0.17",
+        "@vitest/browser-preview": "4.0.17",
+        "@vitest/browser-webdriverio": "4.0.17",
+        "@vitest/ui": "4.0.17",
        "happy-dom": "*",
        "jsdom": "*"
      },
@@ -9291,6 +9533,13 @@
      "peerDependencies": {
        "zod": "^3.25 || ^4"
      }
+    },
+    "node_modules/zone.js": {
+      "version": "0.16.0",
+      "resolved": "https://registry.npmjs.org/zone.js/-/zone.js-0.16.0.tgz",
+      "integrity": "sha512-LqLPpIQANebrlxY6jKcYKdgN5DTXyyHAKnnWWjE5pPfEQ4n7j5zn7mOEEpwNZVKGqx3kKKmvplEmoBrvpgROTA==",
+      "license": "MIT",
+      "peer": true
    }
  }
 }
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
-    "start": "ng serve",
+    "start": "ng serve --host 0.0.0.0 --ssl true --ssl-key \"./cert/server.key\" --ssl-cert \"./cert/server.crt\"",
    "build": "ng build",
    "watch": "ng build --watch --configuration development",
    "test": "ng test"
@@ -29,6 +29,7 @@
    "@angular/forms": "^21.0.0",
    "@angular/platform-browser": "^21.0.0",
    "@angular/router": "^21.0.0",
+    "angular-web-sqlite": "^1.0.34",
    "rxjs": "~7.8.0",
    "tslib": "^2.3.0"
  },
@@ -36,6 +37,7 @@
    "@angular/build": "^21.0.4",
    "@angular/cli": "^21.0.4",
    "@angular/compiler-cli": "^21.0.0",
+    "@vitest/coverage-v8": "^4.0.17",
    "jsdom": "^27.1.0",
    "typescript": "~5.9.2",
    "vitest": "^4.0.8"
--- a/public/barcode-reader/barcode-reader.css
+++ b/public/barcode-reader/barcode-reader.css
@@ -0,0 +1,126 @@
+:host {
+    display: flex;
+    --video-width: 100%;
+    --video-height: 100dvh;
+    --video-background-color: #cccccc;
+    --dialog-background-color: #ffffff;
+    --dialog-backdrop-background-color: #cecece;
+}
+    
+#container {
+    display: none;
+    position: relative;
+    width: var(--video-width);
+    background-color: #000000;
+}
+
+.close-btn {
+    background: none;
+    border-radius: 50%;
+    border-style: none;
+    color: white;
+    font-size: 24px;
+    font-weight: bold;
+    margin-right: 12px;
+    margin-top: 12px;
+    position: absolute;
+    right: 0;
+    top: 0;
+    z-index: 101;
+}
+
+@media screen and (min-width: 1024px) {
+    #container {
+        min-width: 400px;
+        min-height: 300px;
+    }
+}
+    
+#video-container {
+    position: relative;
+    overflow: hidden;
+    height: var(--video-height);
+    max-height: var(--video-height);
+}
+    
+video {
+    width: 100%;
+    display: block;
+    object-fit: cover;
+    height: 100%;
+}
+    
+canvas {
+    position: absolute;
+    top: 30%;
+    width: 100%;
+    height: 25%;
+}   
+    
+#data-canvas {
+    visibility: hidden;
+}
+    
+#frame {
+    opacity: 1;
+    position: absolute;
+    top: 30%;
+    left: 0;
+    width: 100%;
+    height: 25%;
+    background-color: transparent;
+    transform-origin: center center;
+    transform: scale(0.9);
+    transition: transform .3s ease-out;
+}
+    
+:host([capturing]) #frame {
+    transform: scale(0.5);
+}
+    
+:host([no-frame]) #frame {
+    display: none;
+}
+
+.corner {
+    position: absolute;
+    width: 50px;
+    height: 50px;
+    border: 3px solid #ee0b0b;
+    clip-path: polygon(0 48px, 48px 48px, 48px 0, 0 0);
+}
+    
+.top-left {
+    top: 0;
+    left: 0;
+}
+    
+.top-right {
+    top: 0;
+    right: 0;
+    transform: rotate(90deg);
+}
+    
+.bottom-right {
+    bottom: 0;
+    right: 0;
+    transform: rotate(180deg);
+}
+    
+.bottom-left {
+    bottom: 0;
+    left: 0;
+    transform: rotate(-90deg);
+}
+
+.overlay {
+    position: absolute;
+    top: 31%;
+    left: 2%;
+    width: 96%;
+    height: 23%;
+    border-radius: 2%;
+    z-index: 100;
+    box-shadow: 0 0 0 200vmax rgba(0, 0, 0, 0.6);
+    pointer-events: none;
+}
--- a/public/scan-loading-screen/scan-loading-screen.js
+++ b/public/scan-loading-screen/scan-loading-screen.js
--- a/src/app/app.config.ts
+++ b/src/app/app.config.ts
@@ -1,10 +1,21 @@
-import { ApplicationConfig, provideBrowserGlobalErrorListeners } from '@angular/core';
+import { ApplicationConfig, inject, provideAppInitializer, provideBrowserGlobalErrorListeners } from '@angular/core';
 import { provideRouter } from '@angular/router';
-
 import { routes } from './app.routes';
+import { WebSqlite } from 'angular-web-sqlite';
+import { Sqlite } from './services/sqlite';
+import { tables } from '../migrations/20260117';
+

 export const appConfig: ApplicationConfig = {
  providers: [
+    provideAppInitializer(async () => {
+      const sqlite = inject(Sqlite);
+      await sqlite.initializeDatabase('gptdb');
+      await sqlite.batchSqlOperations(tables);
+      await sqlite.executeQuery('PRAGMA foreign_keys = ON;');
+      document.dispatchEvent(new CustomEvent('ng-boot'));
+    }),
+    {provide: WebSqlite, useClass: WebSqlite},
    provideBrowserGlobalErrorListeners(),
    provideRouter(routes)
  ]
--- a/src/app/app.spec.ts
+++ b/src/app/app.spec.ts
@@ -14,10 +14,4 @@ describe('App', () => {
    expect(app).toBeTruthy();
  });

-  it('should render title', async () => {
-    const fixture = TestBed.createComponent(App);
-    await fixture.whenStable();
-    const compiled = fixture.nativeElement as HTMLElement;
-    expect(compiled.querySelector('h1')?.textContent).toContain('Hello, groceries-price-tracker');
-  });
 });
--- a/src/app/components/bar-code-reader/bar-code-reader.html
+++ b/src/app/components/bar-code-reader/bar-code-reader.html
@@ -0,0 +1,6 @@
+<barcode-reader
+    #reader
+    (result)="this.result.emit($event)" 
+    (scan-status)="this.scanStatus.emit($event)" 
+    (scan-permission-denied)="this.scanPermissionDenied.emit()"
+/>
--- a/src/app/components/bar-code-reader/bar-code-reader.scss
+++ b/src/app/components/bar-code-reader/bar-code-reader.scss
@@ -0,0 +1,6 @@
+barcode-reader {
+    display: block;
+    width: 100%;
+    position: absolute;
+    top: 0;
+}
--- a/src/app/components/bar-code-reader/bar-code-reader.spec.ts
+++ b/src/app/components/bar-code-reader/bar-code-reader.spec.ts
@@ -0,0 +1,23 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { BarCodeReaderWrapper } from './bar-code-reader';
+
+describe('BarCodeReaderWrapper', () => {
+  let component: BarCodeReaderWrapper;
+  let fixture: ComponentFixture<BarCodeReaderWrapper>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [BarCodeReaderWrapper]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(BarCodeReaderWrapper);
+    component = fixture.componentInstance;
+    await fixture.whenStable();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});
--- a/src/app/components/bar-code-reader/bar-code-reader.ts
+++ b/src/app/components/bar-code-reader/bar-code-reader.ts
@@ -0,0 +1,23 @@
+import { Component, CUSTOM_ELEMENTS_SCHEMA, effect, ElementRef, input, output, signal, viewChild } from '@angular/core';
+import { DetectedBarcode } from '../../types/globalThis';
+import { BarcodeReader } from '../../web-components/barcode-reader';
+
+@Component({
+  selector: 'app-bar-code-reader',
+  templateUrl: './bar-code-reader.html',
+  styleUrl: './bar-code-reader.scss',
+  schemas: [CUSTOM_ELEMENTS_SCHEMA],
+})
+export class BarCodeReaderWrapper {
+  private readonly ref = viewChild<ElementRef<BarcodeReader>>('reader');
+  protected readonly result = output<Event & {detail?: {code: DetectedBarcode | null}}>();
+  protected readonly scanStatus = output<Event & {detail?: {state: ScanState}}>();
+  protected readonly scanPermissionDenied = output();
+  scan = input({scan: false})
+
+  constructor() {
+    effect(() => this.scan().scan && this.ref()?.nativeElement.scan())
+  }
+}
+
+export type ScanState = 'loading'|'started'|'stopped';
--- a/src/app/components/scan-loading-screen/scan-loading-screen.html
+++ b/src/app/components/scan-loading-screen/scan-loading-screen.html
@@ -0,0 +1 @@
+<scan-loading-screen></scan-loading-screen>
--- a/src/app/components/scan-loading-screen/scan-loading-screen.scss
+++ b/src/app/components/scan-loading-screen/scan-loading-screen.scss
@@ -0,0 +1,7 @@
+:host {
+  display: block;
+  height: 100%;
+  position: absolute;
+  width: 100%;
+  z-index: 999;
+}
--- a/src/app/components/scan-loading-screen/scan-loading-screen.spec.ts
+++ b/src/app/components/scan-loading-screen/scan-loading-screen.spec.ts
@@ -0,0 +1,23 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ScanLoadingScreen } from './scan-loading-screen';
+
+describe('ScanLoadingScreen', () => {
+  let component: ScanLoadingScreen;
+  let fixture: ComponentFixture<ScanLoadingScreen>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ScanLoadingScreen]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(ScanLoadingScreen);
+    component = fixture.componentInstance;
+    await fixture.whenStable();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});
--- a/src/app/components/scan-loading-screen/scan-loading-screen.ts
+++ b/src/app/components/scan-loading-screen/scan-loading-screen.ts
@@ -0,0 +1,12 @@
+import { Component, CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';
+
+@Component({
+  selector: 'app-scan-loading-screen',
+  imports: [],
+  templateUrl: './scan-loading-screen.html',
+  styleUrl: './scan-loading-screen.scss',
+  schemas: [CUSTOM_ELEMENTS_SCHEMA]
+})
+export class ScanLoadingScreen {
+
+}
--- a/src/app/dao/BaseDAO.ts
+++ b/src/app/dao/BaseDAO.ts
@@ -0,0 +1,86 @@
+import { inject } from '@angular/core';
+import { Sqlite } from '../services/sqlite';
+import { QueryResult } from '../types/sqlite.type';
+
+export abstract class BaseDAO<T extends Object, K extends Object, U> {
+  protected readonly sqlite = inject(Sqlite);
+  protected readonly tableName: string;
+
+  constructor(tableName: string) {
+    this.tableName = tableName.toLowerCase();
+  }
+
+  async insert(entity: T) {
+    const params = [];
+    let sql = `INSERT INTO ${this.tableName} ( `;
+    let values = `VALUES ( `;
+    let dbModel = this.toDB(entity);
+    for (let key in dbModel) {
+      if (dbModel[key] !== undefined) {
+        sql += `${key}, `;
+        params.push(dbModel[key]);
+        values += '?, ';
+      }
+    }
+    sql = sql.slice(0, -2);
+    sql += ' ) ';
+    values = values.slice(0, -2);
+    values += ' );';
+    sql = sql + values;
+    const result: { rows: never[] } = await this.sqlite.executeQuery(sql, params);
+    return result;
+  }
+
+  async findBy(values: Partial<K>) {
+    let sql = `SELECT * FROM ${this.tableName} `;
+    const params: any[] = [];
+    const whereSql = this.whereClauseGenerator(values, params);
+    sql += whereSql;
+    sql += ';';
+    const queryResults: QueryResult<U> = await this.sqlite.executeQuery(sql, params);
+    return queryResults.rows.map(this.fromDB);
+  }
+
+  async findAll() {
+    const queryResults: QueryResult<U> = await this.sqlite.executeQuery(
+      `SELECT * FROM ${this.tableName.toLowerCase()}`
+    );
+    return queryResults.rows.map(this.fromDB);
+  }
+
+  async update(values: T, where: Partial<K>) {
+    const params: any[] = [];
+    let sql = `UPDATE ${this.tableName} SET `;
+    let updates = '';
+    let dbModel = this.toDB(values);
+    for (let key in dbModel) {
+      if (dbModel[key] !== undefined) {
+        updates += `${key} = ?, `;
+        params.push(dbModel[key]);
+      }
+    }
+    updates = updates.slice(0, -2);
+    updates += ' ';
+    sql += updates;
+    const whereSql = this.whereClauseGenerator(where, params);
+    sql += whereSql + ';';
+    const result: { rows: never[] } = await this.sqlite.executeQuery(sql, params);
+    return result;
+  }
+
+  protected whereClauseGenerator(values: Partial<K>, params: any[], alias?: string) {
+    let sql = `WHERE `;
+    const objLength = Object.keys(values).length;
+    let i = 0;
+    for (let key in values) {
+      i += 1;
+      sql += `${alias ? alias + '.' : ''}${key} = ? `;
+      params.push(values[key]);
+      if (i < objLength) sql += `AND `;
+    }
+    return sql;
+  }
+
+  protected abstract toDB(model: T): K;
+  protected abstract fromDB(queryResult: U): T;
+}
--- a/src/app/dao/ChainDAO.spec.ts
+++ b/src/app/dao/ChainDAO.spec.ts
@@ -0,0 +1,73 @@
+import { TestBed } from '@angular/core/testing';
+import { ChainDAO } from './ChainDAO';
+import { Sqlite } from '../services/sqlite';
+import { vi } from 'vitest';
+import { QueryResult } from '../types/sqlite.type';
+import { Chain } from '../models/Chain';
+
+describe('ChainDAO', () => {
+  let service: ChainDAO;
+  let sqlite: Partial<Sqlite>;
+  let CHAIN_MOCK: Chain;
+  let RESULTS_MOCK: QueryResult<Chain>;
+
+  beforeEach(() => {
+    CHAIN_MOCK = new Chain('mock', 'mock.png', 1);
+    RESULTS_MOCK = { rows: [CHAIN_MOCK] };
+
+    sqlite = {
+      executeQuery: vi.fn().mockResolvedValue(RESULTS_MOCK),
+    };
+
+    TestBed.configureTestingModule({
+      providers: [{ provide: Sqlite, useValue: sqlite }],
+    });
+
+    service = TestBed.inject(ChainDAO);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+
+  it('should receive mapped results on findAll', async () => {
+    const result = await service.findAll();
+    if (result.length > 0) {
+      expect(result[0]).toEqual(CHAIN_MOCK);
+    } else {
+      test.fails('Expected mock response to contain at least one value');
+    }
+  });
+
+  it('should receive mapped results on findBy', async () => {
+    const result = await service.findBy({ id: CHAIN_MOCK.id, name: CHAIN_MOCK.name });
+    if (result.length > 0) {
+      expect(result[0]).toEqual(CHAIN_MOCK);
+    } else {
+      test.fails('Expected mock response to contain at least one value');
+    }
+  });
+
+  it('should call executeQuery with object fields on insert', async () => {
+    const expectedSql = 'INSERT INTO chain ( name, image, id ) VALUES ( ?, ?, ? );';
+    const expectedParams: any[] = [];
+    for (let key in CHAIN_MOCK) {
+      expectedParams.push(CHAIN_MOCK[<keyof Chain>key]);
+    }
+    await service.insert(CHAIN_MOCK);
+    expect(sqlite.executeQuery).toHaveBeenCalledExactlyOnceWith(expectedSql, expectedParams);
+  });
+
+  it('should call executeQuery with object fields and where values on update', async () => {
+    const expectedParams: any[] = [];
+    CHAIN_MOCK.name = 'Updated mock';
+    for (let key in CHAIN_MOCK) {
+      expectedParams.push(CHAIN_MOCK[<keyof Chain>key]);
+    }
+    const WHERE_MOCK: Partial<Chain> = { id: 1 };
+    expectedParams.push(WHERE_MOCK.id);
+    const expectedSql = 'UPDATE chain SET name = ?, image = ?, id = ? WHERE id = ? ;';
+    await service.update(CHAIN_MOCK, WHERE_MOCK);
+    expect(sqlite.executeQuery).toHaveBeenCalledExactlyOnceWith(expectedSql, expectedParams);
+  });
+});
--- a/src/app/dao/ChainDAO.ts
+++ b/src/app/dao/ChainDAO.ts
@@ -0,0 +1,21 @@
+import { Injectable } from '@angular/core';
+import { Chain } from '../models/Chain';
+import { BaseDAO } from './BaseDAO';
+import { DBChain } from '../models/db/DBChain';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class ChainDAO extends BaseDAO<Chain, DBChain, DBChain> {
+  constructor() {
+    super(Chain.name);
+  }
+
+  override toDB(model: Chain): DBChain {
+    return new DBChain(model.name, model.image, model.id);
+  }
+
+  override fromDB(qResult: DBChain): Chain {
+    return new Chain(qResult.name, qResult.image, qResult.id);
+  }
+}
--- a/src/app/dao/ComposedDAO.ts
+++ b/src/app/dao/ComposedDAO.ts
@@ -0,0 +1,27 @@
+import { QueryResult } from '../types/sqlite.type';
+import { BaseDAO } from './BaseDAO';
+
+export abstract class ComposedDAO<T extends Object, K extends Object, U> extends BaseDAO<T, K, U> {
+  protected readonly JOIN_SQL: string;
+  protected readonly tableAlias: string;
+
+  constructor(tableName: string, joinSql: string, tableAlias: string) {
+    super(tableName);
+    this.JOIN_SQL = joinSql;
+    this.tableAlias = tableAlias;
+  }
+
+  override async findAll() {
+    const result: QueryResult<U> = await this.sqlite.executeQuery(this.JOIN_SQL);
+    return result.rows.map(this.fromDB);
+  }
+
+  override async findBy(values: Partial<K>): Promise<T[]> {
+    let sql = this.JOIN_SQL.slice(0, -1) + ' ';
+    const params: any[] = [];
+    const whereSql = this.whereClauseGenerator(values, params, this.tableAlias);
+    sql += whereSql + ';';
+    const result: QueryResult<U> = await this.sqlite.executeQuery(sql, params);
+    return result.rows.map(this.fromDB);
+  }
+}
--- a/src/app/dao/EstablishmentDAO.spec.ts
+++ b/src/app/dao/EstablishmentDAO.spec.ts
@@ -0,0 +1,76 @@
+import { TestBed } from '@angular/core/testing';
+import { EstablishmentDAO } from './EstablishmentDAO';
+import { Sqlite } from '../services/sqlite';
+import { Establishment } from '../models/Establishment';
+import { Chain } from '../models/Chain';
+import { EstablishmentQueryResult } from '../types/sqlite.type';
+
+describe('EstablishmentDAO', () => {
+  let service: EstablishmentDAO;
+  let sqlite: Partial<Sqlite>;
+  let ESTABLISHMENT_MOCK: Establishment;
+  let QUERY_RESULT_MOCK: EstablishmentQueryResult;
+
+  beforeEach(() => {
+    QUERY_RESULT_MOCK = {
+      address: 'mock street',
+      image: 'mock.jpg',
+      name: 'mock',
+      chain_id: 1,
+      id: 1,
+    };
+    ESTABLISHMENT_MOCK = new Establishment(
+      new Chain(QUERY_RESULT_MOCK.name, QUERY_RESULT_MOCK.image, QUERY_RESULT_MOCK.chain_id),
+      QUERY_RESULT_MOCK.address,
+      QUERY_RESULT_MOCK.id,
+    );
+
+    sqlite = {
+      executeQuery: vi.fn().mockResolvedValue({ rows: [QUERY_RESULT_MOCK] }),
+    };
+
+    TestBed.configureTestingModule({
+      providers: [{ provide: Sqlite, useValue: sqlite }],
+    });
+
+    service = TestBed.inject(EstablishmentDAO);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+
+  it('should receive mapped results on findAll', async () => {
+    const result = await service.findAll();
+    if (result.length > 0) {
+      expect(result[0]).toEqual(ESTABLISHMENT_MOCK);
+    } else {
+      test.fails('Expected mock response to contain at least one value');
+    }
+  });
+
+  it('should receive mapped results on findBy', async () => {
+    const result = await service.findBy({ id: 1 });
+    if (result.length > 0) {
+      expect(result[0]).toEqual(ESTABLISHMENT_MOCK);
+    } else {
+      test.fails('Expected mock response to contain at least one value');
+    }
+  });
+
+  it('should call executeQuery with object fields on insert', async () => {
+    sqlite.executeQuery = vi.fn().mockResolvedValue({ rows: [] });
+    const expectedSql = 'INSERT INTO establishment ( address, chain_id ) VALUES ( ?, ? );';
+    const expectedParams = [ESTABLISHMENT_MOCK.address, ESTABLISHMENT_MOCK.chain.id];
+    ESTABLISHMENT_MOCK.id = undefined;
+    await service.insert(ESTABLISHMENT_MOCK);
+    expect(sqlite.executeQuery).toHaveBeenCalledExactlyOnceWith(expectedSql, expectedParams);
+  });
+
+  it('should throw if toDB is called with a chain that has no id', async () => {
+    sqlite.executeQuery = vi.fn().mockResolvedValue({ rows: [] });
+    ESTABLISHMENT_MOCK.id = undefined;
+    ESTABLISHMENT_MOCK.chain.id = undefined;
+    expect(service.insert(ESTABLISHMENT_MOCK)).rejects.toThrow();
+  });
+});
--- a/src/app/dao/EstablishmentDAO.ts
+++ b/src/app/dao/EstablishmentDAO.ts
@@ -0,0 +1,33 @@
+import { Injectable } from '@angular/core';
+import { Establishment } from '../models/Establishment';
+import { Chain } from '../models/Chain';
+import { DBEstablishment } from '../models/db/DBEstablishment';
+import { ComposedDAO } from './ComposedDAO';
+import { EstablishmentQueryResult } from '../types/sqlite.type';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class EstablishmentDAO extends ComposedDAO<
+  Establishment,
+  DBEstablishment,
+  EstablishmentQueryResult
+> {
+  constructor() {
+    super(
+      Establishment.name,
+      `SELECT e.id, e.address, chain_id, c.name, c.image FROM establishment e JOIN chain c ON c.id = chain_id;`,
+      'e',
+    );
+  }
+
+  protected override toDB(model: Establishment): DBEstablishment {
+    if (!model.chain.id) throw new Error('Chain id is required');
+    return new DBEstablishment(model.address, model.chain.id, model.id);
+  }
+
+  protected override fromDB(qR: EstablishmentQueryResult): Establishment {
+    const chain = new Chain(qR.name, qR.image, qR.chain_id);
+    return new Establishment(chain, qR.address, qR.id);
+  }
+}
--- a/src/app/dao/ProductDAO.spec.ts
+++ b/src/app/dao/ProductDAO.spec.ts
@@ -0,0 +1,46 @@
+import { TestBed } from '@angular/core/testing';
+import { ProductDAO } from './ProductDAO';
+import { Sqlite } from '../services/sqlite';
+import { Product } from '../models/Product';
+
+describe('ProductDAO', () => {
+  let service: ProductDAO;
+  let sqlite: Partial<Sqlite>;
+
+  let PRODUCT_MOCK: Product;
+
+  beforeEach(() => {
+    PRODUCT_MOCK = new Product('12121112', 'mock', 'mock.jpg', 1);
+
+    sqlite = {
+      executeQuery: vi.fn().mockResolvedValue({ rows: [PRODUCT_MOCK] }),
+    };
+
+    TestBed.configureTestingModule({
+      providers: [{ provide: Sqlite, useValue: sqlite }],
+    });
+
+    service = TestBed.inject(ProductDAO);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+
+  it('should receive mapped results on findAll', async () => {
+    const result = await service.findAll();
+    if (result.length > 0) {
+      expect(result[0]).toEqual(PRODUCT_MOCK);
+    } else {
+      test.fails('Expected mock response to contain at least one value');
+    }
+  });
+
+  it('should call executeQuery with object fields on insert', async () => {
+    PRODUCT_MOCK.id = undefined;
+    const expectedSql = 'INSERT INTO product ( barcode, name, image ) VALUES ( ?, ?, ? );';
+    const expectedParams: any[] = [PRODUCT_MOCK.barcode, PRODUCT_MOCK.name, PRODUCT_MOCK.image];
+    await service.insert(PRODUCT_MOCK);
+    expect(sqlite.executeQuery).toHaveBeenCalledExactlyOnceWith(expectedSql, expectedParams);
+  });
+});
--- a/src/app/dao/ProductDAO.ts
+++ b/src/app/dao/ProductDAO.ts
@@ -0,0 +1,21 @@
+import { Injectable } from '@angular/core';
+import { Product } from '../models/Product';
+import { BaseDAO } from './BaseDAO';
+import { DBProduct } from '../models/db/DBProduct';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class ProductDAO extends BaseDAO<Product, DBProduct, DBProduct> {
+  constructor() {
+    super(Product.name);
+  }
+
+  protected override toDB(model: Product): DBProduct {
+    return new Product(model.barcode, model.name, model.image, model.id);
+  }
+
+  protected override fromDB(qR: DBProduct): Product {
+    return new DBProduct(qR.barcode, qR.name, qR.image, qR.id);
+  }
+}
--- a/src/app/dao/ProductEstablishmentDAO.spec.ts
+++ b/src/app/dao/ProductEstablishmentDAO.spec.ts
@@ -0,0 +1,86 @@
+import { TestBed } from '@angular/core/testing';
+import { ProductEstablishmentDAO } from './ProductEstablishmentDAO';
+import { Sqlite } from '../services/sqlite';
+import { ProductEstablishment } from '../models/ProductEstablisment';
+import { Product } from '../models/Product';
+import { Establishment } from '../models/Establishment';
+import { Chain } from '../models/Chain';
+import { ProductEstablishmentQueryResult } from '../types/sqlite.type';
+
+describe('ProductEstablishmentDAO', () => {
+  let service: ProductEstablishmentDAO;
+  let sqlite: Partial<Sqlite>;
+
+  let PRODUCT_ESTABLISHMENT_MOCK: ProductEstablishment;
+  let PRODUCT_ESTABLISHMENT_QUERY_RESULT: ProductEstablishmentQueryResult;
+
+  beforeEach(() => {
+    PRODUCT_ESTABLISHMENT_MOCK = new ProductEstablishment(
+      new Product('121212', 'mock', 'mock.jpg', 1),
+      new Establishment(new Chain('mock', 'mock.png', 1), 'mock street', 1),
+      1,
+    );
+    PRODUCT_ESTABLISHMENT_QUERY_RESULT = {
+      address: PRODUCT_ESTABLISHMENT_MOCK.establishment.address,
+      barcode: PRODUCT_ESTABLISHMENT_MOCK.product.barcode,
+      chain_id: PRODUCT_ESTABLISHMENT_MOCK.establishment.chain.id!,
+      chain_image: PRODUCT_ESTABLISHMENT_MOCK.establishment.chain.image,
+      chain_name: PRODUCT_ESTABLISHMENT_MOCK.establishment.chain.name,
+      establishment_id: PRODUCT_ESTABLISHMENT_MOCK.establishment.id!,
+      id: PRODUCT_ESTABLISHMENT_MOCK.id!,
+      product_id: PRODUCT_ESTABLISHMENT_MOCK.product.id!,
+      product_image: PRODUCT_ESTABLISHMENT_MOCK.product.image,
+      product_name: PRODUCT_ESTABLISHMENT_MOCK.product.name,
+    };
+
+    sqlite = {
+      executeQuery: vi.fn().mockResolvedValue({ rows: [PRODUCT_ESTABLISHMENT_QUERY_RESULT] }),
+    };
+
+    TestBed.configureTestingModule({
+      providers: [{ provide: Sqlite, useValue: sqlite }],
+    });
+
+    service = TestBed.inject(ProductEstablishmentDAO);
+  });
+
+  it('should be created', () => {
+    expect(PRODUCT_ESTABLISHMENT_MOCK).toBeTruthy();
+  });
+
+  it('should receive mapped results on findAll', async () => {
+    const result = await service.findAll();
+    if (result.length > 0) {
+      expect(result[0]).toEqual(PRODUCT_ESTABLISHMENT_MOCK);
+    } else {
+      test.fails('Expected mock response to contain at least one value');
+    }
+  });
+
+  it('should call executeQuery with object fields on insert', async () => {
+    sqlite.executeQuery = vi.fn().mockResolvedValue({ rows: [] });
+    const expectedSql =
+      'INSERT INTO product_establishment ( product_id, establishment_id ) VALUES ( ?, ? );';
+    const expectedParams: any[] = [
+      PRODUCT_ESTABLISHMENT_MOCK.product.id,
+      PRODUCT_ESTABLISHMENT_MOCK.establishment.id,
+    ];
+    PRODUCT_ESTABLISHMENT_MOCK.id = undefined;
+    await service.insert(PRODUCT_ESTABLISHMENT_MOCK);
+    expect(sqlite.executeQuery).toHaveBeenCalledExactlyOnceWith(expectedSql, expectedParams);
+  });
+
+  describe('toDB', () => {
+    it('should throw if toDB is called with a product that has no id', async () => {
+      sqlite.executeQuery = vi.fn().mockResolvedValue({ rows: [] });
+      PRODUCT_ESTABLISHMENT_MOCK.product.id = undefined;
+      expect(service.insert(PRODUCT_ESTABLISHMENT_MOCK)).rejects.toThrow();
+    });
+
+    it('should throw if toDB is called with a establishmen that has no id', async () => {
+      sqlite.executeQuery = vi.fn().mockResolvedValue({ rows: [] });
+      PRODUCT_ESTABLISHMENT_MOCK.establishment.id = undefined;
+      expect(service.insert(PRODUCT_ESTABLISHMENT_MOCK)).rejects.toThrow();
+    });
+  });
+});
--- a/src/app/dao/ProductEstablishmentDAO.ts
+++ b/src/app/dao/ProductEstablishmentDAO.ts
@@ -0,0 +1,43 @@
+import { Injectable } from '@angular/core';
+import { Establishment } from '../models/Establishment';
+import { Product } from '../models/Product';
+import { ProductEstablishment } from '../models/ProductEstablisment';
+import { Chain } from '../models/Chain';
+import { DBProductEstablishment } from '../models/db/DBProductEstablishment';
+import { ComposedDAO } from './ComposedDAO';
+import { ProductEstablishmentQueryResult } from '../types/sqlite.type';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class ProductEstablishmentDAO extends ComposedDAO<
+  ProductEstablishment,
+  DBProductEstablishment,
+  ProductEstablishmentQueryResult
+> {
+  constructor() {
+    super(
+      'product_establishment',
+      `
+    SELECT pe.id, pe.product_id, pe.establishment_id, p.barcode, p.image as product_image, p.name as product_name,
+    e.address, e.chain_id, c.image as chain_image, c.name as chain_name FROM product_establishment pe 
+    JOIN product p ON p.id = pe.product_id 
+    JOIN establishment e ON e.id = pe.establishment_id 
+    JOIN chain c ON c.id = e.chain_id;`,
+      'pe',
+    );
+  }
+
+  protected override toDB(model: ProductEstablishment): DBProductEstablishment {
+    if (!model.product.id) throw new Error('Product id is required');
+    if (!model.establishment.id) throw new Error('Establishment id is required');
+    return new DBProductEstablishment(model.product.id, model.establishment.id, model.id);
+  }
+
+  protected override fromDB(qR: ProductEstablishmentQueryResult): ProductEstablishment {
+    const chain = new Chain(qR.chain_name, qR.chain_image, qR.chain_id);
+    const establishment = new Establishment(chain, qR.address, qR.establishment_id);
+    const product = new Product(qR.barcode, qR.product_name, qR.product_image, qR.product_id);
+    return new ProductEstablishment(product, establishment, qR.id);
+  }
+}
--- a/src/app/dao/PurchaseDAO.spec.ts
+++ b/src/app/dao/PurchaseDAO.spec.ts
@@ -0,0 +1,95 @@
+import { TestBed } from '@angular/core/testing';
+import { PurchaseDAO } from './PurchaseDAO';
+import { Sqlite } from '../services/sqlite';
+import { Purchase } from '../models/Purchase';
+import { Establishment } from '../models/Establishment';
+import { Chain } from '../models/Chain';
+import { Product } from '../models/Product';
+import { PurchaseQueryResult } from '../types/sqlite.type';
+
+describe('PurchaseDAO', () => {
+  let service: PurchaseDAO;
+  let sqlite: Partial<Sqlite>;
+
+  let PURCHASE_MOCK: Purchase;
+  let PURCHASE_QUERY_RESULT_MOCK: PurchaseQueryResult;
+
+  beforeEach(() => {
+    PURCHASE_MOCK = new Purchase(
+      new Establishment(new Chain('mock', 'mock.jpg', 1), 'mock street', 1),
+      new Product('1212112', 'mock', 'mock.png', 1),
+      1245.55,
+      3,
+      Date.now(),
+      1,
+    );
+    PURCHASE_QUERY_RESULT_MOCK = {
+      address: PURCHASE_MOCK.establishment.address,
+      barcode: PURCHASE_MOCK.product.barcode,
+      chain_id: PURCHASE_MOCK.establishment.chain.id!,
+      chain_image: PURCHASE_MOCK.establishment.chain.image,
+      chain_name: PURCHASE_MOCK.establishment.chain.name,
+      date: PURCHASE_MOCK.date,
+      establishment_id: PURCHASE_MOCK.establishment.id!,
+      id: PURCHASE_MOCK.id!,
+      price: PURCHASE_MOCK.price,
+      product_id: PURCHASE_MOCK.product.id!,
+      product_image: PURCHASE_MOCK.product.image,
+      product_name: PURCHASE_MOCK.product.name,
+      quantity: PURCHASE_MOCK.quantity,
+    };
+
+    sqlite = {
+      executeQuery: vi.fn().mockResolvedValue({ rows: [PURCHASE_QUERY_RESULT_MOCK] }),
+    };
+
+    TestBed.configureTestingModule({
+      providers: [{ provide: Sqlite, useValue: sqlite }],
+    });
+
+    service = TestBed.inject(PurchaseDAO);
+  });
+
+  it('should be created', () => {
+    expect(PURCHASE_MOCK).toBeTruthy();
+  });
+
+  it('should receive mapped results on findAll', async () => {
+    const result = await service.findAll();
+    if (result.length > 0) {
+      expect(result[0]).toEqual(PURCHASE_MOCK);
+    } else {
+      test.fails('Expected mock response to contain at least one value');
+    }
+  });
+
+  it('should call executeQuery with object fields on insert', async () => {
+    sqlite.executeQuery = vi.fn().mockResolvedValue({ rows: [] });
+    const expectedSql =
+      'INSERT INTO purchase ( establishment_id, product_id, date, price, quantity ) VALUES ( ?, ?, ?, ?, ? );';
+    const expectedParams: any[] = [
+      PURCHASE_MOCK.establishment.id,
+      PURCHASE_MOCK.product.id,
+      PURCHASE_MOCK.date,
+      PURCHASE_MOCK.price * 100,
+      PURCHASE_MOCK.quantity,
+    ];
+    PURCHASE_MOCK.id = undefined;
+    await service.insert(PURCHASE_MOCK);
+    expect(sqlite.executeQuery).toHaveBeenCalledExactlyOnceWith(expectedSql, expectedParams);
+  });
+
+  describe('toDB', () => {
+    it('should throw if toDB is called with a establishmen that has no id', async () => {
+      sqlite.executeQuery = vi.fn().mockResolvedValue({ rows: [] });
+      PURCHASE_MOCK.establishment.id = undefined;
+      expect(service.insert(PURCHASE_MOCK)).rejects.toThrow();
+    });
+
+    it('should throw if toDB is called with a product that has no id', async () => {
+      sqlite.executeQuery = vi.fn().mockResolvedValue({ rows: [] });
+      PURCHASE_MOCK.product.id = undefined;
+      expect(service.insert(PURCHASE_MOCK)).rejects.toThrow();
+    });
+  });
+});
--- a/src/app/dao/PurchaseDAO.ts
+++ b/src/app/dao/PurchaseDAO.ts
@@ -0,0 +1,48 @@
+import { Injectable } from '@angular/core';
+import { Purchase } from '../models/Purchase';
+import { DBPurchase } from '../models/db/DBPurchase';
+import { Establishment } from '../models/Establishment';
+import { Chain } from '../models/Chain';
+import { Product } from '../models/Product';
+import { ComposedDAO } from './ComposedDAO';
+import { PurchaseQueryResult } from '../types/sqlite.type';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class PurchaseDAO extends ComposedDAO<Purchase, DBPurchase, PurchaseQueryResult> {
+  constructor() {
+    super(
+      Purchase.name,
+      `SELECT p.id, p.price, p.quantity, p.date, p.establishment_id, p.product_id, 
+  pr.barcode, pr.image as product_image, pr.name as product_name, 
+  e.address, e.chain_id, 
+  c.image as chain_image, c.name as chain_name 
+  FROM purchase p 
+  JOIN product pr ON pr.id = p.product_id
+  JOIN establishment e ON e.id = p.establishment_id
+  JOIN chain c ON c.id = e.chain_id;`,
+      'e',
+    );
+  }
+
+  protected override toDB(model: Purchase): DBPurchase {
+    if (!model.establishment.id) throw new Error('Esablishment id is required');
+    if (!model.product.id) throw new Error('Product id is required');
+    return new DBPurchase(
+      model.establishment.id,
+      model.product.id,
+      model.date,
+      model.price * 100,
+      model.quantity,
+      model.id,
+    );
+  }
+
+  protected override fromDB(qR: PurchaseQueryResult): Purchase {
+    const chain = new Chain(qR.chain_name, qR.chain_image, qR.chain_id);
+    const establishment = new Establishment(chain, qR.address, qR.establishment_id);
+    const product = new Product(qR.barcode, qR.product_name, qR.product_image, qR.product_id);
+    return new Purchase(establishment, product, qR.price / 100, qR.quantity, qR.date, qR.id);
+  }
+}
--- a/src/app/models/Chain.spec.ts
+++ b/src/app/models/Chain.spec.ts
@@ -0,0 +1,7 @@
+import { Chain } from './Chain';
+
+describe('Chain', () => {
+  it('should create', () => {
+    expect(new Chain('mock', 'mock.jpg', 1)).toBeTruthy();
+  });
+});
--- a/src/app/models/Chain.ts
+++ b/src/app/models/Chain.ts
@@ -0,0 +1,3 @@
+export class Chain {
+  constructor(public name: string | null, public image: string | null, public id?: number) {}
+}
--- a/src/app/models/Establishment.spec.ts
+++ b/src/app/models/Establishment.spec.ts
@@ -0,0 +1,8 @@
+import { Chain } from './Chain';
+import { Establishment } from './Establishment';
+
+describe('Establishment', () => {
+  it('should create', () => {
+    expect(new Establishment(new Chain('mock', 'mock.jpg', 1), 'Mock street', 1)).toBeTruthy();
+  });
+});
--- a/src/app/models/Establishment.ts
+++ b/src/app/models/Establishment.ts
@@ -0,0 +1,5 @@
+import { Chain } from './Chain';
+
+export class Establishment {
+  constructor(public chain: Chain, public address = '', public id?: number) {}
+}
--- a/src/app/models/Product.spec.ts
+++ b/src/app/models/Product.spec.ts
@@ -0,0 +1,7 @@
+import { Product } from './Product';
+
+describe('Product', () => {
+  it('should create', () => {
+    expect(new Product('1212121121', 'Mock Product', 'product.png', 1)).toBeTruthy();
+  });
+});
--- a/src/app/models/Product.ts
+++ b/src/app/models/Product.ts
@@ -0,0 +1,8 @@
+export class Product {
+  constructor(
+    public barcode: string,
+    public name = '',
+    public image: string | null = null,
+    public id?: number
+  ) {}
+}
--- a/src/app/models/ProductEstablisment.spec.ts
+++ b/src/app/models/ProductEstablisment.spec.ts
@@ -0,0 +1,16 @@
+import { Chain } from './Chain';
+import { Establishment } from './Establishment';
+import { Product } from './Product';
+import { ProductEstablishment } from './ProductEstablisment';
+
+describe('ProductEstablishment', () => {
+  it('should create', () => {
+    expect(
+      new ProductEstablishment(
+        new Product('12121212', 'mock product', 'mock.jpg', 1),
+        new Establishment(new Chain('mock', 'mock', 1)),
+        1,
+      ),
+    );
+  });
+});
--- a/src/app/models/ProductEstablisment.ts
+++ b/src/app/models/ProductEstablisment.ts
@@ -0,0 +1,14 @@
+import { Establishment } from './Establishment';
+import { Product } from './Product';
+
+export class ProductEstablishment {
+  id?: number;
+  establishment: Establishment;
+  product: Product;
+
+  constructor(product: Product, establishment: Establishment, id?: number) {
+    this.id = id;
+    this.establishment = establishment;
+    this.product = product;
+  }
+}
--- a/src/app/models/Purchase.spec.ts
+++ b/src/app/models/Purchase.spec.ts
@@ -0,0 +1,25 @@
+import { Chain } from './Chain';
+import { Establishment } from './Establishment';
+import { Product } from './Product';
+import { Purchase } from './Purchase';
+
+describe('Purchase', () => {
+  let purchase: Purchase;
+  beforeEach(() => {
+      purchase = new Purchase(
+        new Establishment(new Chain('mock', 'image_mock.png', 1), 'mock street', 1),
+        new Product('121212121221', 'mock product', 'image_mock.png', 1),
+        1254.51,
+      )
+  });
+
+  it('should create', () => {
+    expect(purchase).toBeTruthy();
+  });
+
+  it('should divide by 100 on price get and multiply by 100 on set', () => {
+    const PRICE_MOCK = 1475.56;
+    purchase.price = PRICE_MOCK;
+    expect(purchase.price).toBe(PRICE_MOCK);
+  });
+});
--- a/src/app/models/Purchase.ts
+++ b/src/app/models/Purchase.ts
@@ -0,0 +1,24 @@
+import { Establishment } from './Establishment';
+import { Product } from './Product';
+
+export class Purchase {
+  #price: number;
+  constructor(
+    public establishment: Establishment,
+    public product: Product,
+    price = 0,
+    public quantity = 1,
+    public date = Date.now(),
+    public id?: number
+  ) {
+    this.#price = price * 100;
+  }
+
+  get price() {
+    return this.#price / 100;
+  }
+
+  set price(price: number) {
+    this.#price = price * 100;
+  }
+}
--- a/src/app/models/db/DBChain.spec.ts
+++ b/src/app/models/db/DBChain.spec.ts
@@ -0,0 +1,7 @@
+import { DBChain } from './DBChain';
+
+describe('Chain', () => {
+  it('should create', () => {
+    expect(new DBChain('mock', 'mock.jpg', 1)).toBeTruthy();
+  });
+});
--- a/src/app/models/db/DBChain.ts
+++ b/src/app/models/db/DBChain.ts
@@ -0,0 +1,3 @@
+import { Chain } from '../Chain';
+
+export class DBChain extends Chain {}
--- a/src/app/models/db/DBEstablishment.spec.ts
+++ b/src/app/models/db/DBEstablishment.spec.ts
@@ -0,0 +1,7 @@
+import { DBEstablishment } from './DBEstablishment';
+
+describe('DBEstablishment', () => {
+  it('should create', () => {
+    expect(new DBEstablishment('mock address', 1, 1)).toBeTruthy();
+  });
+});
--- a/src/app/models/db/DBEstablishment.ts
+++ b/src/app/models/db/DBEstablishment.ts
@@ -0,0 +1,3 @@
+export class DBEstablishment {
+  constructor(public address: string, public chain_id: number, public id?: number) {}
+}
--- a/src/app/models/db/DBProduct.spec.ts
+++ b/src/app/models/db/DBProduct.spec.ts
@@ -0,0 +1,7 @@
+import { DBProduct } from './DBProduct';
+
+describe('DBProduct', () => {
+  it('should create', () => {
+    expect(new DBProduct('121212112', 'product mock', 'mock.jpg', 1)).toBeTruthy();
+  });
+});
--- a/src/app/models/db/DBProduct.ts
+++ b/src/app/models/db/DBProduct.ts
@@ -0,0 +1,3 @@
+import { Product } from '../Product';
+
+export class DBProduct extends Product {}
--- a/src/app/models/db/DBProductEstablishment.spec.ts
+++ b/src/app/models/db/DBProductEstablishment.spec.ts
@@ -0,0 +1,7 @@
+import { DBProductEstablishment } from './DBProductEstablishment';
+
+describe('DBProductEstablishment', () => {
+  it('should create', () => {
+    expect(new DBProductEstablishment(1, 1, 1)).toBeTruthy();
+  });
+});
--- a/src/app/models/db/DBProductEstablishment.ts
+++ b/src/app/models/db/DBProductEstablishment.ts
@@ -0,0 +1,3 @@
+export class DBProductEstablishment {
+  constructor(public product_id: number, public establishment_id: number, public id?: number) {}
+}
--- a/src/app/models/db/DBPurchase.spec.ts
+++ b/src/app/models/db/DBPurchase.spec.ts
@@ -0,0 +1,7 @@
+import { DBPurchase } from './DBPurchase';
+
+describe('DBPurchase', () => {
+  it('should create', () => {
+    expect(new DBPurchase(1, 1, Date.now(), 1000, 1, 1)).toBeTruthy();
+  });
+});
--- a/src/app/models/db/DBPurchase.ts
+++ b/src/app/models/db/DBPurchase.ts
@@ -0,0 +1,10 @@
+export class DBPurchase {
+  constructor(
+    public establishment_id: number,
+    public product_id: number,
+    public date: number,
+    public price = 0,
+    public quantity = 1,
+    public id?: number
+  ) {}
+}
--- a/src/app/services/sqlite.spec.ts
+++ b/src/app/services/sqlite.spec.ts
@@ -0,0 +1,67 @@
+import { TestBed } from '@angular/core/testing';
+import { vi } from 'vitest';
+import { Sqlite } from './sqlite';
+import { WebSqlite } from 'angular-web-sqlite';
+import { BatchOp } from '../types/sqlite.type';
+
+describe('Sqlite', () => {
+  let service: Sqlite;
+  let webSqlite: Partial<WebSqlite>;
+
+  beforeEach(() => {
+    webSqlite = {
+      init: vi.fn().mockResolvedValue(undefined),
+      executeSql: vi.fn().mockResolvedValue({ rows: [] }),
+      batchSql: vi.fn().mockResolvedValue({ rows: [] }),
+    };
+
+    TestBed.configureTestingModule({
+      providers: [{ provide: WebSqlite, useValue: webSqlite }],
+    });
+    service = TestBed.inject(Sqlite);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+
+  it('should init database', () => {
+    service.initializeDatabase('test').then(() => expect(webSqlite.init).toHaveBeenCalledTimes(1));
+  });
+
+  it('should call executeSql with the given parameters', () => {
+    const SQL_MOCK = `INSERT INTO MOCK VALUES ( ?, ? );`;
+    const PARAMS_MOCK = [1, 'MOCK'];
+    service
+      .executeQuery(SQL_MOCK, PARAMS_MOCK)
+      .then(() =>
+        expect(webSqlite.executeSql).toHaveBeenCalledExactlyOnceWith(SQL_MOCK, PARAMS_MOCK),
+      );
+  });
+
+  it('should call batchSql with the given parameters', () => {
+    const batch: BatchOp[] = [
+      ['DROP TABLE chain;', []],
+      ['DROP TABLE establishment;', []],
+    ];
+    service
+      .batchSqlOperations(batch)
+      .then(() => expect(webSqlite.batchSql).toHaveBeenCalledExactlyOnceWith(batch));
+  });
+
+  it('should drop all existing tables that are not sqlite engine related', () => {
+    const batchSqlOperationsSpy = vi
+      .spyOn(service, 'batchSqlOperations')
+      .mockResolvedValue({ rows: [] });
+    const TABLES_QUERY_RESULT_MOCK = {
+      rows: [{ name: 'chain' }, { name: 'establishment' }, { name: 'sqlite_sequence' }],
+    };
+    const expectedBatch = TABLES_QUERY_RESULT_MOCK.rows
+      .filter((r) => !r.name.startsWith('sqlite_'))
+      .map((table) => [`DROP TABLE ${table.name};`, []]);
+    webSqlite.executeSql = vi.fn().mockResolvedValue(TABLES_QUERY_RESULT_MOCK);
+    service
+      .dropAllTables()
+      .then(() => expect(batchSqlOperationsSpy).toHaveBeenCalledExactlyOnceWith(expectedBatch));
+  });
+});
--- a/src/app/services/sqlite.ts
+++ b/src/app/services/sqlite.ts
@@ -0,0 +1,34 @@
+import { inject, Injectable } from '@angular/core';
+import { WebSqlite } from 'angular-web-sqlite';
+import { BatchOp } from '../types/sqlite.type';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class Sqlite {
+  private readonly webSqlite = inject(WebSqlite);
+
+  initializeDatabase(dbName: string) {
+    return this.webSqlite.init(dbName);
+  }
+
+  async executeQuery(sql: string, params: any[] = []) {
+    const result = await this.webSqlite.executeSql(sql, params);
+    return result;
+  }
+
+  async batchSqlOperations(ops: BatchOp[]) {
+    const result = await this.webSqlite.batchSql(ops);
+    return result;
+  }
+
+  async dropAllTables() {
+    const tables: { rows: { name: string }[] } = await this.executeQuery(
+      "SELECT * FROM sqlite_master WHERE type='table';"
+    );
+    const dropQueries: BatchOp[] = tables.rows
+      .filter((r) => !r.name.startsWith('sqlite_'))
+      .map((table) => [`DROP TABLE ${table.name};`, []]);
+    return this.batchSqlOperations(dropQueries);
+  }
+}
--- a/src/app/types/globalThis.d.ts
+++ b/src/app/types/globalThis.d.ts
@@ -0,0 +1,22 @@
+type ImageBitmapSource = HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | OffscreenCanvas | VideoFrame | Blob | ImageData
+
+export type BarcodeDetectorOptions = {
+  formats: string[]
+}
+
+export type DetectedBarcode = {
+  boundingBox: DOMRectReadOnly;
+  cornerPoints: coords[];
+  format: string[];
+  rawValue: string;
+}
+
+declare global {
+  var BarcodeDetector: BarcodeDetector;
+}
+
+declare type BarcodeDetector =  {
+    new (formats?: {formats: string[]}): BarcodeDetector;
+    static getSupportedFormats(): Promise<string[]>;
+    detect(imageBitmapSource: ImageBitmapSource): Promise<DetectedBarcode[]>;
+}
--- a/src/app/types/sqlite.type.ts
+++ b/src/app/types/sqlite.type.ts
@@ -0,0 +1,37 @@
+import { Chain } from '../models/Chain';
+import { Establishment } from '../models/Establishment';
+
+export type QueryResult<T> = { rows: T[] };
+export type BatchOp = [string, any[]];
+
+export type PurchaseQueryResult = {
+  id: number;
+  price: number;
+  quantity: number;
+  date: number;
+  establishment_id: number;
+  product_id: number;
+  barcode: string;
+  product_image: string | null;
+  product_name: string;
+  address: string;
+  chain_id: number;
+  chain_image: string | null;
+  chain_name: string | null;
+};
+
+export type ProductEstablishmentQueryResult = {
+  address: string;
+  barcode: string;
+  chain_id: number;
+  chain_image: string | null;
+  chain_name: string | null;
+  establishment_id: number;
+  id: number;
+  product_id: number;
+  product_image: string | null;
+  product_name: string;
+};
+
+export type EstablishmentQueryResult = Omit<Establishment, 'chain'> &
+  Omit<Chain, 'id'> & { id: number; chain_id: number };
--- a/src/app/web-components/barcode-reader.ts
+++ b/src/app/web-components/barcode-reader.ts
@@ -0,0 +1,198 @@
+import type { BarcodeDetector, DetectedBarcode } from '../types/globalThis';
+
+export class BarcodeReader extends HTMLElement {
+  animationFrameId = null;
+  constraints = {
+    audio: false,
+    video: {
+      facingMode: 'environment',
+    },
+  };
+  container = document.createElement('div');
+  video = document.createElement('video');
+  dataCanvas = document.createElement('canvas');
+  dataCtx: CanvasRenderingContext2D | null | undefined;
+  detector: BarcodeDetector | null = null;
+  code: DetectedBarcode | null = null;
+  stream: MediaStream | null = null;
+  scanId = -1;
+  frame = document.createElement('div');
+
+  constructor() {
+    super();
+    const link = document.createElement('link');
+    link.rel = 'stylesheet';
+    link.href = '/barcode-reader/barcode-reader.css';
+    this.container.setAttribute('id', 'container');
+    const closeBtn = document.createElement('button');
+    closeBtn.textContent = 'X';
+    closeBtn.onclick = this.stopScan.bind(this);
+    closeBtn.classList.add('close-btn')
+    this.container.appendChild(closeBtn);
+    const videoContainer = document.createElement('div');
+    videoContainer.setAttribute('id', 'video-container');
+    this.container.appendChild(videoContainer);
+
+    
+    const overlay = document.createElement('div');
+    overlay.classList.add('overlay');
+    this.video.setAttribute('autoplay', '');
+    this.video.setAttribute('playsinline', '');
+    this.dataCanvas.setAttribute('id', 'data-canvas');
+
+    this.frame.setAttribute('id', 'frame');
+    this.frame.style.display = 'none';
+    for (let el of ['top-left', 'top-right', 'bottom-right', 'bottom-left']) {
+      const div = document.createElement('div');
+      div.classList.add('corner', el);
+      this.frame.appendChild(div);
+    }
+    videoContainer.appendChild(overlay);
+    videoContainer.appendChild(this.dataCanvas);
+    videoContainer.appendChild(this.video);
+    videoContainer.appendChild(this.frame);
+
+    const shadowRoot = this.attachShadow({ mode: 'open' });
+    shadowRoot.appendChild(link);
+    shadowRoot.appendChild(this.container);
+    this.capturing = false;
+
+    this.dataCtx = this.dataCanvas.getContext('2d', { willReadFrequently: true, alpha: false });
+  }
+
+  get capturing() {
+    return this.hasAttribute('capturing');
+  }
+
+  set capturing(isCapturing) {
+    if (isCapturing) {
+      this.setAttribute('capturing', '');
+    } else {
+      this.removeAttribute('capturing');
+    }
+  }
+
+  async connectedCallback() {
+    this.detector = await this.getDetector();
+    this.video.onplaying = async () => {
+      if (this.dataCanvas) {
+        this.dataCanvas.width = this.dataCanvas.offsetWidth;
+        this.dataCanvas.height = this.dataCanvas.offsetHeight;
+        this.getResults();
+      }
+    };
+  }
+
+  async getDetector(): Promise<BarcodeDetector | null> {
+    if (globalThis.BarcodeDetector) {
+      const formats = await BarcodeDetector.getSupportedFormats();
+      return new BarcodeDetector({ formats });
+    }
+    return null;
+  }
+
+  async scan() {
+    this.showContainer(true);
+
+    try {
+      this.capturing = true;
+      this.code = null;
+
+      if (this.stream instanceof MediaStream) {
+        await this.getResults();
+      } else {
+        this.dispatchEvent(new CustomEvent('scan-status', { detail: { state: 'loading' } }));
+        this.stream = await navigator.mediaDevices.getUserMedia(this.constraints);
+        this.startVideo();
+        this.showFrame();
+        this.dispatchEvent(new CustomEvent('scan-status', { detail: { state: 'started' } }));
+        this.dispatchEvent(new CustomEvent('scan-start'));
+      }
+    } catch (e) {
+      console.log(e);
+      this.showContainer(false);
+      this.dispatchEvent(new CustomEvent('scan-status', { detail: { state: 'stopped' } }));
+      this.dispatchEvent(new CustomEvent('scan-permission-denied'));
+      this.capturing = false;
+    }
+  }
+
+  stopScan() {
+    clearTimeout(this.scanId);
+    if (this.stream) {
+      this.capturing = false;
+      this.stream.getTracks().forEach((track) => track.stop());
+      this.stream = null;
+      this.video.srcObject = null;
+      this.dispatchEvent(new CustomEvent('scan-stop'));
+      this.dispatchEvent(new CustomEvent('scan-status', { detail: { state: 'stopped' } }));
+      this.hideFrame();
+      this.showContainer(false);
+    }
+  }
+
+  startVideo() {
+    if (this.video) this.video.srcObject = this.stream;
+  }
+
+  parseResults(results: DetectedBarcode[]) {
+    const code = results.length > 0 ? results[0] : undefined;
+    if (code && code.rawValue !== '') {
+      clearTimeout(this.scanId);
+      this.code = code;
+      this.capturing = false;
+
+      setTimeout(() => {
+        this.dispatchEvent(
+          new CustomEvent('result', {
+            detail: { code },
+          })
+        );
+        this.stopScan();
+      }, 300);
+    } else {
+      this.scanId = setTimeout(this.getResults.bind(this), 300);
+    }
+  }
+
+  async getResults() {
+    if (this.code) {
+      clearTimeout(this.scanId);
+      return false;
+    }
+
+    try {
+      if (this.video && this.detector) {
+        let imgData: ImageData | null = this.getImageData(this.video);
+        if (imgData) {
+          const results = await this.detector.detect(imgData);
+          imgData = null;
+          this.parseResults(results);
+        }
+      }
+    } catch (e) {
+      console.log('error', e);
+    }
+    return undefined;
+  }
+
+  getImageData(source: HTMLVideoElement) {
+    if (this.dataCtx) {
+      this.dataCtx.drawImage(source, 0, 0, this.dataCanvas.width, this.dataCanvas.height);
+      return this.dataCtx.getImageData(0, 0, this.dataCanvas.width, this.dataCanvas.height);
+    }
+    return null;
+  }
+
+  showContainer(show: boolean) {
+    this.container.style.display = show ? 'block' : 'none';
+  }
+
+  showFrame() {
+    this.frame.style.display = 'block';
+  }
+
+  hideFrame() {
+    this.frame.style.display = 'none';
+  }
+}
--- a/src/index.html
+++ b/src/index.html
@@ -8,6 +8,13 @@
  <link rel="icon" type="image/x-icon" href="favicon.ico">
 </head>
 <body>
+  <scan-loading-screen></scan-loading-screen>
  <app-root></app-root>
+  <script src="/scan-loading-screen/scan-loading-screen.js" fetchpriority="high"></script>
+  <script>
+    document.addEventListener('ng-boot', () => {
+      document.querySelector('scan-loading-screen').remove();
+    })
+  </script>
 </body>
 </html>
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,6 +1,8 @@
 import { bootstrapApplication } from '@angular/platform-browser';
 import { appConfig } from './app/app.config';
 import { App } from './app/app';
+import { BarcodeReader } from './app/web-components/barcode-reader';

 bootstrapApplication(App, appConfig)
+  .then(() => customElements.define('barcode-reader', BarcodeReader))
  .catch((err) => console.error(err));
--- a/src/migrations/20260117.ts
+++ b/src/migrations/20260117.ts
@@ -0,0 +1,56 @@
+const chainSql =
+  'CREATE TABLE IF NOT EXISTS chain ( ' +
+  'id INTEGER PRIMARY KEY AUTOINCREMENT, ' +
+  'image TEXT, ' +
+  'name TEXT ' +
+  ');';
+
+const establishmentSql =
+  'CREATE TABLE IF NOT EXISTS establishment ( ' +
+  'id INTEGER PRIMARY KEY AUTOINCREMENT ,' +
+  'address TEXT NOT NULL, ' +
+  'chain_id INTEGER NOT NULL, ' +
+  'FOREIGN KEY (chain_id) REFERENCES chain(id) ON DELETE CASCADE ' +
+  ');';
+
+const establishmentChainIdxSql =
+  'CREATE INDEX IF NOT EXISTS idx_establishment_chain_id ON establishment(chain_id);';
+
+const productSql =
+  'CREATE TABLE IF NOT EXISTS product ( ' +
+  'id INTEGER PRIMARY KEY AUTOINCREMENT, ' +
+  'barcode TEXT NOT NULL UNIQUE, ' +
+  'name TEXT NOT NULL DEFAULT "", ' +
+  'image TEXT ' +
+  ');';
+
+const productEstablishmentSql =
+  'CREATE TABLE IF NOT EXISTS product_establishment ( ' +
+  'id INTEGER PRIMARY KEY AUTOINCREMENT, ' +
+  'product_id INTEGER NOT NULL, ' +
+  'establishment_id INTEGER NOT NULL, ' +
+  'FOREIGN KEY (product_id) REFERENCES product(id) ON DELETE CASCADE, ' +
+  'FOREIGN KEY (establishment_id) REFERENCES establishment(id) ON DELETE CASCADE, ' +
+  'UNIQUE(product_id, establishment_id) ' +
+  ');';
+
+const purchaseSql =
+  'CREATE TABLE IF NOT EXISTS purchase ( ' +
+  'id INTEGER PRIMARY KEY AUTOINCREMENT, ' +
+  'establishment_id INTEGER NOT NULL, ' +
+  'product_id INTEGER NOT NULL, ' +
+  'price INTEGER NOT NULL DEFAULT 0, ' +
+  'quantity INTEGER NOT NULL DEFAULT 1, ' +
+  'date INTEGER NOT NULL, ' +
+  'FOREIGN KEY (establishment_id) REFERENCES establishment(id) ON DELETE CASCADE, ' +
+  'FOREIGN KEY (product_id) REFERENCES product(id) ON DELETE CASCADE ' +
+  ');';
+
+export const tables: [string, any[]][] = [
+  [chainSql, []],
+  [establishmentSql, []],
+  [establishmentChainIdxSql, []],
+  [productSql, []],
+  [productEstablishmentSql, []],
+  [purchaseSql, []],
+];
--- a/src/styles.scss
+++ b/src/styles.scss
@@ -1 +1,4 @@
-/* You can add global styles to this file, and also import other style files */
+html, body {
+    margin: 0 0;
+    height: 100%;
+}
Author	SHA1	Message	Date
Gabriel De Los Rios	dfacc39e57	test: add unit tests for DAOs	2026-01-18 18:36:34 -03:00
Gabriel De Los Rios	e125fb6e64	build: excludes html files from test coverage report	2026-01-18 17:59:59 -03:00
Gabriel De Los Rios	0a56fc6be0	fix: removes console.log	2026-01-18 15:13:05 -03:00
Gabriel De Los Rios	3467a574c1	fix: remove console.log	2026-01-18 00:32:28 -03:00
Gabriel De Los Rios	adc20904cc	test(model/db): test instantiation	2026-01-17 22:56:19 -03:00
Gabriel De Los Rios	af84abe3f8	test(models/domain): test instantiation	2026-01-17 22:46:53 -03:00
Gabriel De Los Rios	4c51822bf0	test: extends coverage for sqlite service	2026-01-17 22:16:11 -03:00
Gabriel De Los Rios	8e53710c90	build: add testing coverage tool for vitest	2026-01-17 19:03:12 -03:00
Gabriel De Los Rios	4655ba4f64	feat(barcode reader): add wrapper for the webcomponent	2026-01-17 18:54:36 -03:00
Gabriel De Los Rios	ead327d44f	feat(barcode reader): add close btn	2026-01-17 18:51:37 -03:00
Gabriel De Los Rios	a8ff28829d	fix: increment z-index	2026-01-17 18:24:29 -03:00
Gabriel De Los Rios	888d636be6	refactor: db initialization	2026-01-17 16:05:22 -03:00
Gabriel De Los Rios	230ba670ab	feat(persistance): add migration	2026-01-17 15:01:49 -03:00
Gabriel De Los Rios	fd763cc162	feat(persistance) : add DAO	2026-01-17 15:01:16 -03:00
Gabriel De Los Rios	8b462f98f6	feat(persistance): add db models	2026-01-17 15:00:24 -03:00
Gabriel De Los Rios	90233c7208	feat: add domain models	2026-01-17 14:58:39 -03:00
Gabriel De Los Rios	ab2aca1d97	feat(persistance): add additional ops for sqlite	2026-01-17 14:43:40 -03:00
Gabriel De Los Rios	fcee6e0b19	test: remove outdated test	2026-01-03 00:21:16 -03:00
Gabriel De Los Rios	5e1e453b0b	feat(loading screen): add angular wrapper	2026-01-03 00:20:02 -03:00
Gabriel De Los Rios	a870e875c8	test: add missing dependency	2026-01-03 00:12:23 -03:00
Gabriel De Los Rios	49b9389532	feat: add barcode reader	2026-01-02 23:32:01 -03:00
Gabriel De Los Rios	7c6045f1b3	refactor: replace scan loading style loading	2026-01-02 22:42:05 -03:00
Gabriel De Los Rios	7952e5632a	refactor: add loading screen on app initialization	2026-01-01 22:33:18 -03:00
Gabriel De Los Rios	92e426b316	feat(loading): add loading screen as web component	2026-01-01 22:14:58 -03:00
Gabriel De Los Rios	f095efd9e0	refactor: add global styles	2026-01-01 21:45:18 -03:00
Gabriel De Los Rios	1290130d8e	feat(wa-sqlite): db initiallization	2026-01-01 14:00:30 -03:00
Gabriel De Los Rios	7be44bd8f2	feat(wa-sqlite): add mock cert, modifies npm dev command	2026-01-01 13:11:47 -03:00
Gabriel De Los Rios	0938dc861d	build: add wrapped wa-sqlite for angular	2025-12-27 20:14:38 -03:00
				`@@ -0,0 +1 @@`
				`<scan-loading-screen></scan-loading-screen>`