add sequlize, lesson 84 done

.gitignore

-/node_modules
\ No newline at end of file
+/node_modules
+.env
\ No newline at end of file

db/db.json

-[{"title":"Apple","price":77,"description":"This is an apple","id":"ea4f2bd1-2d5a-42ea-99e6-50a125bfe82d"}]
\ No newline at end of file
+[{"title":"Apple","price":77,"description":"This is an apple","id":"ea4f2bd1-2d5a-42ea-99e6-50a125bfe82d"},{"title":"Orange","price":999,"description":"This is an orange","id":"ab1e3e0d-7cd1-48ac-a216-4b231e5cd7df"}]
\ No newline at end of file

package-lock.json

@@ -9,12 +9,21 @@
       "version": "1.0.0",
       "license": "ISC",
       "dependencies": {
+        "cors": "^2.8.5",
+        "dotenv": "^16.0.3",
         "express": "^4.18.2",
+        "pg": "^8.9.0",
+        "pg-hstore": "^2.3.4",
+        "sequelize": "^6.29.0",
+        "sequelize-typescript": "^2.1.5",
         "uuidv4": "^6.2.13"
       },
       "devDependencies": {
+        "@types/cors": "^2.8.13",
+        "@types/dotenv": "^8.2.0",
         "@types/express": "^4.17.17",
         "@types/uuidv4": "^5.0.0",
+        "@types/validator": "^13.7.12",
         "ts-node-dev": "^2.0.0"
       }
     },
@@ -98,6 +107,33 @@
         "@types/node": "*"
       }
     },
+    "node_modules/@types/cors": {
+      "version": "2.8.13",
+      "resolved": "https://registry.npmjs.org/@types/cors/-/cors-2.8.13.tgz",
+      "integrity": "sha512-RG8AStHlUiV5ysZQKq97copd2UmVYw3/pRMLefISZ3S1hK104Cwm7iLQ3fTKx+lsUH2CE8FlLaYeEA2LSeqYUA==",
+      "dev": true,
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
+    "node_modules/@types/debug": {
+      "version": "4.1.7",
+      "resolved": "https://registry.npmjs.org/@types/debug/-/debug-4.1.7.tgz",
+      "integrity": "sha512-9AonUzyTjXXhEOa0DnqpzZi6VHlqKMswga9EXjpXnnqxwLtdvPPtlO8evrI5D9S6asFRCQ6v+wpiUKbw+vKqyg==",
+      "dependencies": {
+        "@types/ms": "*"
+      }
+    },
+    "node_modules/@types/dotenv": {
+      "version": "8.2.0",
+      "resolved": "https://registry.npmjs.org/@types/dotenv/-/dotenv-8.2.0.tgz",
+      "integrity": "sha512-ylSC9GhfRH7m1EUXBXofhgx4lUWmFeQDINW5oLuS+gxWdfUeW4zJdeVTYVkexEW+e2VUvlZR2kGnGGipAWR7kw==",
+      "deprecated": "This is a stub types definition. dotenv provides its own type definitions, so you do not need this installed.",
+      "dev": true,
+      "dependencies": {
+        "dotenv": "*"
+      }
+    },
     "node_modules/@types/express": {
       "version": "4.17.17",
       "resolved": "https://registry.npmjs.org/@types/express/-/express-4.17.17.tgz",
@@ -127,11 +163,15 @@
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       "dev": true
     },
+    "node_modules/@types/ms": {
+      "version": "0.7.31",
+      "resolved": "https://registry.npmjs.org/@types/ms/-/ms-0.7.31.tgz",
+      "integrity": "sha512-iiUgKzV9AuaEkZqkOLDIvlQiL6ltuZd9tGcW3gwpnX8JbuiuhFlEGmmFXEXkN50Cvq7Os88IY2v0dkDqXYWVgA=="
+    },
     "node_modules/@types/node": {
       "version": "18.14.1",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-18.14.1.tgz",
-      "integrity": "sha512-QH+37Qds3E0eDlReeboBxfHbX9omAcBCXEzswCu6jySP642jiM3cYSIkU/REqwhCUqXdonHFuBfJDiAJxMNhaQ==",
-      "dev": true
+      "integrity": "sha512-QH+37Qds3E0eDlReeboBxfHbX9omAcBCXEzswCu6jySP642jiM3cYSIkU/REqwhCUqXdonHFuBfJDiAJxMNhaQ=="
     },
     "node_modules/@types/qs": {
       "version": "6.9.7",
@@ -177,6 +217,11 @@
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+    "node_modules/@types/validator": {
+      "version": "13.7.12",
+      "resolved": "https://registry.npmjs.org/@types/validator/-/validator-13.7.12.tgz",
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+    },
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@@ -237,8 +282,7 @@
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@@ -276,7 +320,6 @@
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@@ -300,6 +343,14 @@
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       "dev": true
     },
+    "node_modules/buffer-writer": {
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+      "resolved": "https://registry.npmjs.org/buffer-writer/-/buffer-writer-2.0.0.tgz",
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+      }
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@@ -350,8 +401,7 @@
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-      "dev": true
+      "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg=="
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@@ -385,6 +435,18 @@
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     },
+    "node_modules/cors": {
+      "version": "2.8.5",
+      "resolved": "https://registry.npmjs.org/cors/-/cors-2.8.5.tgz",
+      "integrity": "sha512-KIHbLJqu73RGr/hnbrO9uBeixNGuvSQjul/jdFvS/KFSIH1hWVd1ng7zOHx+YrEfInLG7q4n6GHQ9cDtxv/P6g==",
+      "dependencies": {
+        "object-assign": "^4",
+        "vary": "^1"
+      },
+      "engines": {
+        "node": ">= 0.10"
+      }
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@@ -425,6 +487,19 @@
         "node": ">=0.3.1"
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+    "node_modules/dotenv": {
+      "version": "16.0.3",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.0.3.tgz",
+      "integrity": "sha512-7GO6HghkA5fYG9TYnNxi14/7K9f5occMlp3zXAuSxn7CKCxt9xbNWG7yF8hTCSUchlfWSe3uLmlPfigevRItzQ==",
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/dottie": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/dottie/-/dottie-2.0.3.tgz",
+      "integrity": "sha512-4liA0PuRkZWQFQjwBypdxPfZaRWiv5tkhMXY2hzsa2pNf5s7U3m9cwUchfNKe8wZQxdGPQQzO6Rm2uGe0rvohQ=="
+    },
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       "resolved": "https://registry.npmjs.org/dynamic-dedupe/-/dynamic-dedupe-0.3.0.tgz",
@@ -549,8 +624,7 @@
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-      "dev": true
+      "integrity": "sha512-OO0pH2lK6a0hZnAdau5ItzHPI6pUlvI7jMVnxUQRtw4owF2wk8lOSabtGDCTP4Ggrg2MbGnWO9X8K1t4+fGMDw=="
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     "node_modules/fsevents": {
       "version": "2.3.2",
@@ -664,11 +738,18 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/inflection": {
+      "version": "1.13.4",
+      "resolved": "https://registry.npmjs.org/inflection/-/inflection-1.13.4.tgz",
+      "integrity": "sha512-6I/HUDeYFfuNCVS3td055BaXBwKYuzw7K3ExVMStBowKo9oOAMJIXIHvdyR3iboTCp1b+1i5DSkIZTcwIktuDw==",
+      "engines": [
+        "node >= 0.4.0"
+      ]
+    },
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         "wrappy": "1"
@@ -741,6 +822,22 @@
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+    "node_modules/lodash": {
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+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
+    },
+    "node_modules/lru-cache": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
+      "integrity": "sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==",
+      "dependencies": {
+        "yallist": "^4.0.0"
+      },
+      "engines": {
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@@ -802,7 +899,6 @@
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       },
@@ -831,6 +927,25 @@
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+    "node_modules/moment": {
+      "version": "2.29.4",
+      "resolved": "https://registry.npmjs.org/moment/-/moment-2.29.4.tgz",
+      "integrity": "sha512-5LC9SOxjSc2HF6vO2CyuTDNivEdoz2IvyJJGj6X8DJ0eFyfszE0QiEd+iXmBvUP3WHxSjFH/vIsA0EN00cgr8w==",
+      "engines": {
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+    "node_modules/moment-timezone": {
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+      "resolved": "https://registry.npmjs.org/moment-timezone/-/moment-timezone-0.5.41.tgz",
+      "integrity": "sha512-e0jGNZDOHfBXJGz8vR/sIMXvBIGJJcqFjmlg9lmE+5KX1U7/RZNMswfD8nKnNCnQdKTIj50IaRKwl1fvMLyyRg==",
+      "dependencies": {
+        "moment": "^2.29.4"
+      },
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       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
@@ -853,6 +968,14 @@
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+    "node_modules/object-assign": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
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+      "engines": {
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@@ -876,11 +999,15 @@
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-      "dev": true,
       "dependencies": {
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+    "node_modules/packet-reader": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/packet-reader/-/packet-reader-1.0.0.tgz",
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+    },
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@@ -893,7 +1020,6 @@
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@@ -909,6 +1035,91 @@
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+    "node_modules/pg": {
+      "version": "8.9.0",
+      "resolved": "https://registry.npmjs.org/pg/-/pg-8.9.0.tgz",
+      "integrity": "sha512-ZJM+qkEbtOHRuXjmvBtOgNOXOtLSbxiMiUVMgE4rV6Zwocy03RicCVvDXgx8l4Biwo8/qORUnEqn2fdQzV7KCg==",
+      "dependencies": {
+        "buffer-writer": "2.0.0",
+        "packet-reader": "1.0.0",
+        "pg-connection-string": "^2.5.0",
+        "pg-pool": "^3.5.2",
+        "pg-protocol": "^1.6.0",
+        "pg-types": "^2.1.0",
+        "pgpass": "1.x"
+      },
+      "engines": {
+        "node": ">= 8.0.0"
+      },
+      "peerDependencies": {
+        "pg-native": ">=3.0.1"
+      },
+      "peerDependenciesMeta": {
+        "pg-native": {
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+    "node_modules/pg-connection-string": {
+      "version": "2.5.0",
+      "resolved": "https://registry.npmjs.org/pg-connection-string/-/pg-connection-string-2.5.0.tgz",
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+    },
+    "node_modules/pg-hstore": {
+      "version": "2.3.4",
+      "resolved": "https://registry.npmjs.org/pg-hstore/-/pg-hstore-2.3.4.tgz",
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+      "engines": {
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+    },
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+      "engines": {
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+      "resolved": "https://registry.npmjs.org/pg-pool/-/pg-pool-3.5.2.tgz",
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+      "peerDependencies": {
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+      }
+    },
+    "node_modules/pg-protocol": {
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+        "postgres-array": "~2.0.0",
+        "postgres-bytea": "~1.0.0",
+        "postgres-date": "~1.0.4",
+        "postgres-interval": "^1.1.0"
+      },
+      "engines": {
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+    "node_modules/pgpass": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/pgpass/-/pgpass-1.0.5.tgz",
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@@ -921,6 +1132,41 @@
         "url": "https://github.com/sponsors/jonschlinkert"
       }
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+    "node_modules/postgres-array": {
+      "version": "2.0.0",
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     },
+    "split2": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/split2/-/split2-4.1.0.tgz",
+      "integrity": "sha512-VBiJxFkxiXRlUIeyMQi8s4hgvKCSjtknJv/LVYbrgALPwf5zSKmEwV9Lst25AkvMDnvxODugjdl6KZgwKM1WYQ=="
+    },
     "statuses": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.1.tgz",
@@ -2259,6 +2961,11 @@
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
       "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA=="
     },
+    "toposort-class": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/toposort-class/-/toposort-class-1.0.1.tgz",
+      "integrity": "sha512-OsLcGGbYF3rMjPUf8oKktyvCiUxSbqMMS39m33MAjLTC1DVIH6x3WSt63/M77ihI09+Sdfk1AXvfhCEeUmC7mg=="
+    },
     "tree-kill": {
       "version": "1.2.2",
       "resolved": "https://registry.npmjs.org/tree-kill/-/tree-kill-1.2.2.tgz",
@@ -2332,6 +3039,11 @@
       "dev": true,
       "peer": true
     },
+    "underscore": {
+      "version": "1.13.6",
+      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.13.6.tgz",
+      "integrity": "sha512-+A5Sja4HP1M08MaXya7p5LvjuM7K6q/2EaC0+iovj/wOcMsTzMvDFbasi/oSapiwOlt252IqsKqPjCl7huKS0A=="
+    },
     "unpipe": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
@@ -2342,6 +3054,11 @@
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
       "integrity": "sha512-pMZTvIkT1d+TFGvDOqodOclx0QWkkgi6Tdoa8gC8ffGAAqz9pzPTZWAybbsHHoED/ztMtkv/VoYTYyShUn81hA=="
     },
+    "uuid": {
+      "version": "8.3.2",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz",
+      "integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg=="
+    },
     "uuidv4": {
       "version": "6.2.13",
       "resolved": "https://registry.npmjs.org/uuidv4/-/uuidv4-6.2.13.tgz",
@@ -2355,11 +3072,6 @@
           "version": "8.3.4",
           "resolved": "https://registry.npmjs.org/@types/uuid/-/uuid-8.3.4.tgz",
           "integrity": "sha512-c/I8ZRb51j+pYGAu5CrFMRxqZ2ke4y2grEBO5AUjgSkSk+qT2Ea+OdWElz/OiMf5MNpn2b17kuVBwZLQJXzihw=="
-        },
-        "uuid": {
-          "version": "8.3.2",
-          "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz",
-          "integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg=="
         }
       }
     },
@@ -2369,22 +3081,38 @@
       "integrity": "sha512-wa7YjyUGfNZngI/vtK0UHAN+lgDCxBPCylVXGp0zu59Fz5aiGtNXaq3DhIov063MorB+VfufLh3JlF2KdTK3xg==",
       "dev": true
     },
+    "validator": {
+      "version": "13.9.0",
+      "resolved": "https://registry.npmjs.org/validator/-/validator-13.9.0.tgz",
+      "integrity": "sha512-B+dGG8U3fdtM0/aNK4/X8CXq/EcxU2WPrPEkJGslb47qyHsxmbggTWK0yEA4qnYVNF+nxNlN88o14hIcPmSIEA=="
+    },
     "vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
       "integrity": "sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg=="
     },
+    "wkx": {
+      "version": "0.5.0",
+      "resolved": "https://registry.npmjs.org/wkx/-/wkx-0.5.0.tgz",
+      "integrity": "sha512-Xng/d4Ichh8uN4l0FToV/258EjMGU9MGcA0HV2d9B/ZpZB3lqQm7nkOdZdm5GhKtLLhAE7PiVQwN4eN+2YJJUg==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
-      "dev": true
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="
     },
     "xtend": {
       "version": "4.0.2",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
-      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
-      "dev": true
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ=="
+    },
+    "yallist": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
     },
     "yn": {
       "version": "3.1.1",

package.json

@@ -10,12 +10,21 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
+    "cors": "^2.8.5",
+    "dotenv": "^16.0.3",
     "express": "^4.18.2",
+    "pg": "^8.9.0",
+    "pg-hstore": "^2.3.4",
+    "sequelize": "^6.29.0",
+    "sequelize-typescript": "^2.1.5",
     "uuidv4": "^6.2.13"
   },
   "devDependencies": {
+    "@types/cors": "^2.8.13",
+    "@types/dotenv": "^8.2.0",
     "@types/express": "^4.17.17",
     "@types/uuidv4": "^5.0.0",
+    "@types/validator": "^13.7.12",
     "ts-node-dev": "^2.0.0"
   }
 }

src/controllers/healthCheck.ts

 import express, { Router, Request, Response } from 'express'
-import { EStatuses } from '../enums/EStatuses'
-import IResponse from '../interfaces/IResponse'
 
-const router: Router = express.Router()
 
-router.get('/', (req: Request, res: Response) => {
-    try {
-        const response: IResponse = {
-            status: EStatuses.OK,
-            result: undefined,
-            message: 'Server is ok'
-        }
-        res.send(response)
-    } catch (err: unknown) {
-        const error = err as Error
-        const response: IResponse = {
-            status: EStatuses.NOT_OK,
-            result: undefined,
-            message: error.message
-        }
-        res.status(200).send(response)
+export class HealthCheckController {
+    private router: Router
+
+    constructor() {
+        this.router = express.Router()
+        this.router.get('/', this.checkHealth)
     }
-})
 
-export const healthCheckRouter = router
\ No newline at end of file
+    public getRouter = (): Router => {
+        return this.router
+    }
+    
+    private checkHealth = (req: Request, res: Response): void => {
+        res.send('Server is OK')
+    }
+}
\ No newline at end of file

src/controllers/products.ts

 import express, { Router, Request, Response } from 'express'
-import { productService } from '../services/products'
+import { ProductService, productService } from '../services/products'
+import { ProductServicePg, productServicePg } from '../services/productsPg'
+export class ProductsController {
+    private router: Router
+    private service: ProductService | ProductServicePg
 
-const router: Router = express.Router()
+    constructor() {
+        this.router = express.Router()
+        this.router.get('/', this.getProducts)
+        this.router.get('/:id', this.getProductById)
+        this.router.post('/', this.addProduct)
+        switch(process.env.DB) {
+            case 'file':
+                this.service = productService
+                break
+            case 'postgres':
+                this.service = productServicePg
+                break
+            default:
+                this.service = productServicePg
+        }
+    }
 
-router.get('/', (req: Request, res: Response) => {
-    const response = productService.getProducts()
-    res.send(response)
-})
+    public getRouter = (): Router => {
+        return this.router
+    }
 
-router.get('/:id', (req: Request, res: Response) => {
-    const response = productService.getProductById(req.params.id)
-    res.send(response)
-})
+    private getProducts = async (req: Request, res: Response): Promise<void> => {
+        const response = await this.service.getProducts()
+        res.send(response)
+    }
 
-router.post('/', (req: Request, res: Response) => {
-    const response = productService.addProduct(req.body)
-    res.send(response)
-})
+    private getProductById = async (req: Request, res: Response): Promise<void> => {
+        const response = await this.service.getProductById(req.params.id)
+        res.send(response)
+    }
 
-export const productsRouter = router
\ No newline at end of file
+    private addProduct = async (req: Request, res: Response): Promise<void> => {
+        const response = await this.service.addProduct(req.body)
+        res.send(response)
+    }
+}
\ No newline at end of file

src/index.ts

 import express, { Express } from 'express'
-import { config } from './index.config'
-import { healthCheckRouter } from './controllers/healthCheck'
-import { productsRouter } from './controllers/products'
+import { HealthCheckController } from './controllers/healthCheck'
+import { ProductsController } from './controllers/products'
 import { db } from './repository/fileDB'
+import cors from 'cors'
+import dotenv from 'dotenv'
+import { postgresDB } from './repository/postgresDB'
+dotenv.config()
 
-const app: Express = express()
-app.use(express.json())
 
-const run = async () => {
-    db.init()
-    app.use('/health-check', healthCheckRouter)
-    app.use('/products', productsRouter)
-    app.listen(config.port, () => {
-        console.log(`Server is running on port ${config.port}`)
-    })
+class App {
+    private app: Express
+    constructor() {
+        this.app = express()
+        this.app.use(express.json())
+        this.app.use(cors())
+    }
+
+    public init = async (): Promise<void> => {
+        try {
+            this.app.use('/health-check', new HealthCheckController().getRouter())
+            this.app.use('/products', new ProductsController().getRouter())
+            this.app.listen(process.env.APP_PORT, () => {
+                console.log(`Server is running on port ${process.env.APP_PORT}`)
+            })
+            
+            switch(process.env.DB) {
+                case 'file':
+                    db.init()
+                    break
+                case 'postgres':
+                    await postgresDB.init()
+                    break
+                default:
+                    await postgresDB.init()
+            }
+        } catch(err) {
+            console.log(err)
+        }
+    }
+
 }
 
-run()
-.then(() => {
-    console.log('Everything is ok')
-})
-.catch((err: unknown) => {
-    const error = err as Error
-    console.log(error.message)
-})
\ No newline at end of file
+
+const app = new App()
+app.init()
\ No newline at end of file

src/interfaces/IAction.ts

+export default interface IAction {
+    id: string
+    product_id: string
+    supplier_id: string
+    action_date: Date
+    price: number
+    qty: number
+}
\ No newline at end of file

src/interfaces/IActionDto.ts

+export default interface IActionDto {
+    product_id: string
+    supplier_id: string
+    action_date: Date
+    price: number
+    qty: number
+}
\ No newline at end of file

src/interfaces/IBrand.ts

+export default interface IBrand {
+    id: string
+    brand: string
+}
\ No newline at end of file

src/interfaces/IBrandDto.ts

+export default interface IBrandDto {
+    brand: string
+}
\ No newline at end of file

src/interfaces/ICategory.ts

+export default interface ICategory {
+    id: string
+    category: string
+    description: string
+}
\ No newline at end of file

src/interfaces/ICategoryDto.ts

+export default interface ICategoryDto {
+    category: string
+    description: string
+}
\ No newline at end of file

src/interfaces/IProduct.ts

+import ISupplier from "./ISupplier"
+
 export default interface IProduct {
     id: string
-    title: string
+    product: string
     price: number
+    category_id: string
+    brand_id: string
     description: string
+    suppliers?: ISupplier[]
 }
\ No newline at end of file

src/interfaces/IProductDto.ts

+export default interface IProductDto {
+    product: string
+    price: number
+    description: string
+    category_id: string
+    brand_id: string
+}
\ No newline at end of file

src/interfaces/IRequest.ts

-export default interface IRequest {
-    title: string
-    price: number
-    description: string
-}
\ No newline at end of file

src/interfaces/IResponse.ts

@@ -2,7 +2,7 @@ import { EStatuses } from "../enums/EStatuses";
 import IProduct from "./IProduct";
 
 export default interface IResponse {
-    result: IProduct[] | IProduct | undefined
+    result: IProduct[] | IProduct | undefined | null
     message: string
     status: EStatuses
 }
\ No newline at end of file

src/interfaces/ISupplier.ts

+import IProduct from "./IProduct"
+
+export default interface ISupplier {
+    id: string
+    supplier: string
+    address: string
+    contacts: string
+    products: IProduct[]
+}
\ No newline at end of file

src/interfaces/ISupplierDto.ts

+export default interface ISupplierDto {
+    supplier: string
+    address: string
+    contacts: string
+}
\ No newline at end of file

src/models/Action.ts

+import {Model, Table, Column, PrimaryKey, DataType, NotNull, ForeignKey} from 'sequelize-typescript'
+import { uuid } from 'uuidv4'
+import { Product } from './Product'
+import { Supplier } from './Supplier'
+
+
+@Table({
+    tableName: 'actions',
+    timestamps: false
+})
+export class Action extends Model {
+    @PrimaryKey
+    @Column({
+        type: DataType.STRING,
+        allowNull: false,
+        defaultValue: uuid()
+    })
+    id!: string
+
+    @ForeignKey(() =>  Product)
+    @NotNull
+    @Column({
+        allowNull: false
+    })
+    product_id!: string
+
+    @ForeignKey(() => Supplier)
+    @NotNull
+    @Column({
+        allowNull: false
+    })
+    supplier_id!: string
+
+    @NotNull
+    @Column({
+        allowNull: false
+    })
+    action_date!: Date
+
+    @NotNull
+    @Column({
+        allowNull: false
+    })
+    price!: number
+
+    @NotNull
+    @Column({
+        allowNull: false
+    })
+    qty!: number
+}
\ No newline at end of file

src/models/Brand.ts

+import {Model, Table, Column, PrimaryKey, DataType, NotNull} from 'sequelize-typescript'
+import { uuid } from 'uuidv4'
+
+
+@Table({
+    tableName: 'brands',
+    timestamps: false
+})
+export class Brand extends Model {
+    @PrimaryKey
+    @Column({
+        type: DataType.STRING,
+        allowNull: false,
+        defaultValue: uuid()
+    })
+    id!: string
+
+    @NotNull
+    @Column({
+        allowNull: false
+    })
+    brand!: string
+}
\ No newline at end of file

src/models/Category.ts

+import {Model, Table, Column, PrimaryKey, DataType, NotNull} from 'sequelize-typescript'
+import { uuid } from 'uuidv4'
+
+
+@Table({
+    tableName: 'categories',
+    timestamps: false
+})
+export class Category extends Model {
+    @PrimaryKey
+    @Column({
+        type: DataType.STRING,
+        allowNull: false,
+        defaultValue: uuid()
+    })
+    id!: string
+
+    @NotNull
+    @Column({
+        allowNull: false
+    })
+    category!: string
+
+    @NotNull
+    @Column({
+        allowNull: false
+    })
+    description!: string
+}
\ No newline at end of file

src/models/Product.ts

+import {Model, Table, Column, PrimaryKey, DataType, NotNull, ForeignKey, BelongsToMany} from 'sequelize-typescript'
+import { uuid } from 'uuidv4'
+import { Action } from './Action'
+import { Brand } from './Brand'
+import { Category } from './Category'
+import { Supplier } from './Supplier'
+
+
+@Table({
+    tableName: 'products',
+    timestamps: false
+})
+export class Product extends Model {
+    @BelongsToMany(() => Supplier, () => Action)
+    suppliers!: Supplier[]
+
+    @PrimaryKey
+    @Column({
+        type: DataType.STRING,
+        allowNull: false,
+        defaultValue: uuid()
+    })
+    id!: string
+
+    @ForeignKey(() =>  Category)
+    @Column({
+        allowNull: true
+    })
+    category_id!: string
+
+    @ForeignKey(() => Brand)
+    @Column({
+        allowNull: true
+    })
+    brand_id!: string
+
+    @NotNull
+    @Column({
+        allowNull: false
+    })
+    product!: string
+
+    @NotNull
+    @Column({
+        allowNull: false
+    })
+    description!: string
+
+    @NotNull
+    @Column({
+        type: DataType.DECIMAL,
+        allowNull: false
+    })
+    price!: number
+}
\ No newline at end of file

src/models/Supplier.ts

+import {Model, Table, Column, PrimaryKey, DataType, NotNull, BelongsToMany} from 'sequelize-typescript'
+import { uuid } from 'uuidv4'
+import { Action } from './Action'
+import { Product } from './Product'
+
+
+@Table({
+    tableName: 'suppliers',
+    timestamps: false
+})
+export class Supplier extends Model {
+    @BelongsToMany(() => Product, () => Action)
+    products!: Product[]
+
+    @PrimaryKey
+    @Column({
+        type: DataType.STRING,
+        allowNull: false,
+        defaultValue: uuid()
+    })
+    id!: string
+
+    @NotNull
+    @Column({
+        allowNull: false
+    })
+    supplier!: string
+
+    @NotNull
+    @Column({
+        allowNull: false
+    })
+    address!: string
+
+    @Column({
+        allowNull: true
+    })
+    contacts!: string
+}
\ No newline at end of file

src/repository/fileDB.ts

 import IProduct from "../interfaces/IProduct";
 import fs from 'node:fs/promises'
 import { uuid } from 'uuidv4';
-import IRequest from "../interfaces/IRequest";
+import IProductDto from "../interfaces/IProductDto";
 
 class FileDB {
     data: IProduct[]
@@ -34,7 +34,7 @@ class FileDB {
         return this.data.find(p => p.id === id);
       }
      
-      addItem = (item: IRequest): IProduct => {
+      addItem = (item: IProductDto): IProduct => {
         const id: string = uuid()
         const product: IProduct = {...item, id}
         this.data.push(product);

src/repository/postgresDB.ts

+
+
+import dotenv from 'dotenv'
+import { Sequelize } from 'sequelize-typescript'
+dotenv.config()
+import path from 'path'
+
+export class PostgresDB {
+   private sequelize: Sequelize 
+   constructor() {
+    this.sequelize = new Sequelize({
+        database: process.env.PG_DB,
+        dialect: 'postgres',
+        host: process.env.PG_HOST,
+        username: process.env.PG_USER,
+        password: process.env.PG_PASS,
+        storage: ':memory',
+        models: [path.join(__dirname, '../models')]
+    })
+   }
+
+   public getSequelize = (): Sequelize => {
+        return this.sequelize
+   }
+
+   public close = async(): Promise<void> => {
+        await this.sequelize.close()
+   }
+
+   public init = async (): Promise<void> => {
+        try {
+            await this.sequelize.authenticate()
+            await this.sequelize.sync({
+                alter: true
+            })
+            console.log('DB postgres is connected')
+        } catch (err) {
+            console.log(err)
+        }
+   }
+}
+
+export const postgresDB = new PostgresDB()
\ No newline at end of file

src/services/products.ts

 import { EStatuses } from "../enums/EStatuses"
 import IProduct from "../interfaces/IProduct"
-import IRequest from "../interfaces/IRequest"
+import IProductDto from "../interfaces/IProductDto"
 import IResponse from "../interfaces/IResponse"
 import { db } from "../repository/fileDB"
 
-class ProductService {
-    getProducts = (): IResponse => {
+export class ProductService {
+    public getProducts = (): IResponse => {
         try {
             const data = db.getItems()
             const response: IResponse = {
                 status: EStatuses.OK,
                 result: data,
-                message: ''
+                message: 'Products found'
             }
             return response
         } catch (err: unknown) {
@@ -25,7 +25,7 @@ class ProductService {
         }
     }
 
-    getProductById = (id: string): IResponse => {
+    public getProductById = (id: string): IResponse => {
         try {
             const data: IProduct | undefined = db.getItemById(id)
             const response: IResponse = {
@@ -45,7 +45,7 @@ class ProductService {
         }
     }
 
-    addProduct = (product: IRequest): IResponse => {
+    public addProduct = (product: IProductDto): IResponse => {
         try {
             const data: IProduct | undefined = db.addItem(product)
             const response: IResponse = {

src/services/productsPg.ts

+import { EStatuses } from "../enums/EStatuses"
+import IProduct from "../interfaces/IProduct"
+import IProductDto from "../interfaces/IProductDto"
+import IResponse from "../interfaces/IResponse"
+import { Product } from "../models/Product"
+import { Op } from 'sequelize'
+
+export class ProductServicePg {
+    public getProducts = async (): Promise<IResponse> => {
+        try {
+            const data = await Product.findAll()
+            // {
+            //     where: {
+            //         title:  {
+            //             [Op.like]: '%App%'
+            //         }
+            //     }
+            // }
+            const response: IResponse = {
+                status: EStatuses.OK,
+                result: data,
+                message: 'Products found'
+            }
+            return response
+        } catch (err: unknown) {
+            const error = err as Error
+            const response: IResponse = {
+                status: EStatuses.NOT_OK,
+                result: undefined,
+                message: error.message
+            }
+            return response
+        }
+    }
+
+    public getProductById = async (id: string): Promise<IResponse> => {
+        try {
+            const data: IProduct | null = await Product.findByPk(id)
+            const response: IResponse = {
+                status: EStatuses.OK,
+                result: data,
+                message: ''
+            }
+            return response
+        } catch (err: unknown) {
+            const error = err as Error
+            const response: IResponse = {
+                status: EStatuses.NOT_OK,
+                result: undefined,
+                message: error.message
+            }
+            return response
+        }
+    }
+
+    public addProduct = async (product: IProductDto): Promise<IResponse> => {
+        try {
+            const data: IProduct | undefined = await Product.create({...product})
+            const response: IResponse = {
+                status: EStatuses.OK,
+                result: data,
+                message: ''
+            }
+            return response
+        } catch (err: unknown) {
+            const error = err as Error
+            const response: IResponse = {
+                status: EStatuses.NOT_OK,
+                result: undefined,
+                message: error.message
+            }
+            return response
+        }
+    }
+
+}
+
+export const productServicePg = new ProductServicePg()
\ No newline at end of file

tsconfig.json

@@ -14,8 +14,8 @@
     "target": "es2020",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
     // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
     // "jsx": "preserve",                                /* Specify what JSX code is generated. */
-    // "experimentalDecorators": true,                   /* Enable experimental support for TC39 stage 2 draft decorators. */
-    // "emitDecoratorMetadata": true,                    /* Emit design-type metadata for decorated declarations in source files. */
+    "experimentalDecorators": true,                   /* Enable experimental support for TC39 stage 2 draft decorators. */
+    "emitDecoratorMetadata": true,                    /* Emit design-type metadata for decorated declarations in source files. */
     // "jsxFactory": "",                                 /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h'. */
     // "jsxFragmentFactory": "",                         /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */
     // "jsxImportSource": "",                            /* Specify module specifier used to import the JSX factory functions when using 'jsx: react-jsx*'. */