Feat(modules-sdk,inventory,stock-location): modules isolated connection (#3329)

* feat: scoped container for modules

packages/utils/jest.config.js

@@ -0,0 +1,13 @@
+module.exports = {
+  globals: {
+    "ts-jest": {
+      tsConfig: "tsconfig.json",
+      isolatedModules: false,
+    },
+  },
+  transform: {
+    "^.+\\.[jt]s?$": "ts-jest",
+  },
+  testEnvironment: `node`,
+  moduleFileExtensions: [`js`, `ts`],
+}

packages/utils/package.json

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+{
+  "name": "@medusajs/utils",
+  "version": "0.0.1",
+  "description": "Medusa utilities functions shared by Medusa core and Modules",
+  "main": "dist/index.js",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/medusajs/medusa",
+    "directory": "packages/utils"
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "files": [
+    "dist"
+  ],
+  "author": "Medusa",
+  "license": "MIT",
+  "devDependencies": {
+    "@medusajs/types": "*",
+    "cross-env": "^5.2.1",
+    "jest": "^25.5.4",
+    "ts-jest": "^25.5.1",
+    "typeorm": "^0.3.11",
+    "typescript": "^4.4.4"
+  },
+  "peerDependencies": {
+    "@medusajs/types": "^0.0.1"
+  },
+  "scripts": {
+    "prepare": "cross-env NODE_ENV=production yarn run build",
+    "build": "tsc --build",
+    "test": "jest --passWithNoTests src"
+  }
+}

packages/utils/src/decorators/context-parameter.ts

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+export function MedusaContext() {
+  return function (
+    target: any,
+    propertyKey: string | symbol,
+    parameterIndex: number
+  ) {
+    if (!target.MedusaContext_) {
+      target.MedusaContext_ = {}
+    }
+
+    if (propertyKey in target.MedusaContext_) {
+      throw new Error(
+        `Only one MedusaContext is allowed on method "${String(propertyKey)}".`
+      )
+    }
+
+    target.MedusaContext_[propertyKey] = parameterIndex
+  }
+}

packages/utils/src/decorators/index.ts

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+export * from "./context-parameter"
+export * from "./inject-entity-manager"

packages/utils/src/decorators/inject-entity-manager.ts

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+import { SharedContext } from "@medusajs/types"
+
+export function InjectEntityManager(
+  managerProperty = "manager_"
+): MethodDecorator {
+  return function (
+    target: any,
+    propertyKey: string | symbol,
+    descriptor: any
+  ): void {
+    if (!target.MedusaContext_) {
+      throw new Error(
+        `To apply @InjectEntityManager you have to flag a parameter using @MedusaContext`
+      )
+    }
+
+    const originalMethod = descriptor.value
+
+    const argIndex = target.MedusaContext_[propertyKey]
+    descriptor.value = async function (...args: any[]) {
+      const context: SharedContext = args[argIndex] ?? {}
+
+      if (context?.transactionManager) {
+        return await originalMethod.apply(this, args)
+      }
+
+      return await this[managerProperty].transaction(
+        async (transactionManager) => {
+          args[argIndex] = args[argIndex] ?? {}
+          args[argIndex].transactionManager = transactionManager
+
+          return await originalMethod.apply(this, args)
+        }
+      )
+    }
+  }
+}

packages/utils/src/index.ts

@@ -0,0 +1 @@
+export * from "./decorators"

packages/utils/tsconfig.json

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+{
+  "compilerOptions": {
+    "lib": ["es2020"],
+    "target": "es2020",
+    "outDir": "./dist",
+    "esModuleInterop": true,
+    "declaration": true,
+    "module": "commonjs",
+    "moduleResolution": "node",
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "sourceMap": true,
+    "noImplicitReturns": true,
+    "strictNullChecks": true,
+    "strictFunctionTypes": true,
+    "noImplicitThis": true,
+    "allowJs": true,
+    "skipLibCheck": true
+  },
+  "include": ["src"],
+  "exclude": [
+    "dist",
+    "./src/**/__tests__",
+    "./src/**/__mocks__",
+    "node_modules"
+  ]
+}