Adds dynamic coupon codes and segment plugin

packages/medusa-plugin-discount-generator/.babelrc

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+{
+  "plugins": [
+    "@babel/plugin-proposal-class-properties",
+    "@babel/plugin-transform-instanceof",
+    "@babel/plugin-transform-classes"
+  ],
+  "presets": ["@babel/preset-env"],
+  "env": {
+    "test": {
+      "plugins": ["@babel/plugin-transform-runtime"]
+    }
+  }
+}

packages/medusa-plugin-discount-generator/.eslintrc

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+{
+  "plugins": ["prettier"],
+  "extends": ["prettier"],
+  "rules": {
+    "prettier/prettier": "error",
+    "semi": "error",
+    "no-unused-expressions": "true"
+  }
+}

packages/medusa-plugin-discount-generator/.gitignore

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+/lib
+node_modules
+.DS_store
+.env*
+/*.js
+!index.js
+!jest.config.js
+
+/dist
+
+/api
+/services
+/models
+/subscribers
+

packages/medusa-plugin-discount-generator/.npmignore

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+/lib
+node_modules
+.DS_store
+.env*
+/*.js
+!index.js
+yarn.lock
+
+

packages/medusa-plugin-discount-generator/.prettierrc

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+{
+  "endOfLine": "lf",
+  "semi": false,
+  "singleQuote": false,
+  "tabWidth": 2,
+  "trailingComma": "es5"
+}

packages/medusa-plugin-discount-generator/jest.config.js

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+module.exports = {
+  testEnvironment: "node",
+}

packages/medusa-plugin-discount-generator/package.json

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+{
+  "name": "medusa-plugin-discount-generator",
+  "version": "1.0.0",
+  "main": "index.js",
+  "license": "MIT",
+  "author": "Sebastian Rindom",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/medusajs/medusa",
+    "directory": "packages/medusa-plugin-discount-generator"
+  },
+  "devDependencies": {
+    "@babel/cli": "^7.7.5",
+    "@babel/core": "^7.7.5",
+    "@babel/node": "^7.7.4",
+    "@babel/plugin-proposal-class-properties": "^7.7.4",
+    "@babel/plugin-transform-instanceof": "^7.8.3",
+    "@babel/plugin-transform-runtime": "^7.7.6",
+    "@babel/preset-env": "^7.7.5",
+    "@babel/register": "^7.7.4",
+    "@babel/runtime": "^7.9.6",
+    "client-sessions": "^0.8.0",
+    "cross-env": "^5.2.1",
+    "eslint": "^6.8.0",
+    "jest": "^25.5.2"
+  },
+  "scripts": {
+    "build": "babel src -d .",
+    "prepare": "cross-env NODE_ENV=production npm run build",
+    "watch": "babel -w src --out-dir . --ignore **/__tests__",
+    "test": "jest"
+  },
+  "dependencies": {
+    "body-parser": "^1.19.0",
+    "express": "^4.17.1",
+    "medusa-core-utils": "^0.1.27",
+    "randomatic": "^3.1.1"
+  }
+}

packages/medusa-plugin-discount-generator/src/api/index.js

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+import { Router } from "express"
+import bodyParser from "body-parser"
+import { Validator, MedusaError } from "medusa-core-utils"
+
+export default (container) => {
+  const route = Router()
+
+  route.post("/discount-code", bodyParser.json(), async (req, res) => {
+    const schema = Validator.object().keys({
+      discount_code: Validator.string().required(),
+    })
+
+    const { value, error } = schema.validate(req.body)
+    if (error) {
+      throw new MedusaError(MedusaError.Types.INVALID_DATA, error.details)
+    }
+
+    const discountGenerator = req.scope.resolve("discountGeneratorService")
+    const code = await discountGenerator.generateDiscount(value.discount_code)
+
+    res.json({
+      code
+    })
+  })
+
+
+  return route
+}
+

packages/medusa-plugin-discount-generator/src/services/discount-generator.js

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+import randomize from "randomatic"
+import { BaseService } from "medusa-interfaces"
+
+class DiscountGeneratorService extends BaseService {
+  constructor({ discountService }) {
+    super()
+
+    this.discountService_ = discountService
+  }
+
+  async generateDiscount(dynamicDiscountCode) {
+    const discount = await this.discountService_.retrieveByCode(dynamicDiscountCode)
+    const data = {
+      code: randomize("A0", 10)
+    }
+    return this.discountService_.createDynamicCode(discount._id, data)
+  }
+}
+
+export default DiscountGeneratorService