feat: add unleash web provider

.github/component_owners.yml

@@ -30,6 +30,8 @@ components:
     - markphelps
   libs/providers/flipt-web:
     - markphelps
+  libs/providers/unleash-web:
+    - jarebudev
 
 ignored-authors:
   - renovate-bot

.release-please-manifest.json

@@ -18,5 +18,6 @@
   "libs/providers/multi-provider-web": "0.0.2",
   "libs/providers/growthbook-client": "0.1.2",
   "libs/providers/config-cat-web": "0.1.3",
-  "libs/shared/config-cat-core": "0.1.0"
+  "libs/shared/config-cat-core": "0.1.0",
+  "libs/providers/unleash-web": "0.1.0"
 }

libs/providers/unleash-web/.eslintrc.json

@@ -0,0 +1,25 @@
+{
+  "extends": ["../../../.eslintrc.json"],
+  "ignorePatterns": ["!**/*"],
+  "overrides": [
+    {
+      "files": ["*.ts", "*.tsx", "*.js", "*.jsx"],
+      "rules": {}
+    },
+    {
+      "files": ["*.ts", "*.tsx"],
+      "rules": {}
+    },
+    {
+      "files": ["*.js", "*.jsx"],
+      "rules": {}
+    },
+    {
+      "files": ["*.json"],
+      "parser": "jsonc-eslint-parser",
+      "rules": {
+        "@nx/dependency-checks": "error"
+      }
+    }
+  ]
+}

libs/providers/unleash-web/README.md

@@ -0,0 +1,82 @@
+# unleash-web Provider
+
+## About this provider
+
+This provider is a community-developed implementation for Unleash which uses the official [Unleash Proxy Client for the browser Client Side SDK](https://docs.getunleash.io/reference/sdks/javascript-browser).
+
+This provider uses a **static evaluation context** suitable for client-side implementation.
+
+Suitable for connecting to an Unleash instance
+
+* Via the [Unleash front-end API](https://docs.getunleash.io/reference/front-end-api).
+* Via [Unleash Edge](https://docs.getunleash.io/reference/unleash-edge).
+* Via [Unleash Proxy](https://docs.getunleash.io/reference/unleash-proxy).
+
+[Gitlab Feature Flags](https://docs.gitlab.com/ee/operations/feature_flags.html) can also be used with this provider - although note that Unleash Edge is not currently supported by Gitlab.
+
+### Concepts
+* Boolean evaluation gets feature enabled status.
+* String, Number, and Object evaluation gets feature variant value.
+* Object evaluation should be used for JSON/CSV payloads in variants.
+
+## Installation
+
+```shell
+$ npm install @openfeature/unleash-web-provider @openfeature/web-sdk
+```
+
+## Usage
+
+To initialize the OpenFeature client with Unleash, you can use the following code snippet:
+
+```ts
+import { UnleashWebProvider } from '@openfeature/unleash-web-provider';
+
+const provider = new UnleashWebProvider({
+      url: 'http://your.upstream.unleash.instance',
+      clientKey: 'theclientkey',
+      appName: 'your app',
+  });
+
+await OpenFeature.setProviderAndWait(provider);
+```
+
+After the provider gets initialized, you can start evaluations of feature flags like so:
+
+```ts
+// Note - this can also be set within the contructor
+const evaluationCtx: EvaluationContext = {
+  usedId: 'theuser',
+  currentTime: 'time',
+  sessionId: 'theSessionId',
+  remoteAddress: 'theRemoteAddress',
+  environment: 'theEnvironment',
+  appName: 'theAppName',
+  aCustomProperty: 'itsValue',
+  anotherCustomProperty: 'somethingForIt',
+};
+
+// Set the static context for OpenFeature
+await OpenFeature.setContext(evaluationCtx);
+
+// Get the client 
+const client = await OpenFeature.getClient();
+
+// You can now use the client to evaluate your flags
+const details = client.getBooleanValue('my-feature', false);
+```
+### Available Options
+
+Unleash has a variety of configuration options that can be provided to the the `UnleashWebProvider` constructor.
+
+Please refer to the options described in the official [Unleash Proxy Client for the browser Client Side SDK](https://docs.getunleash.io/reference/sdks/javascript-browser#available-options).
+
+## Contribute
+
+### Building
+
+Run `nx package providers-unleash-web` to build the library.
+
+### Running unit tests
+
+Run `nx test providers-unleash-web` to execute the unit tests via [Jest](https://jestjs.io).

libs/providers/unleash-web/babel.config.json

@@ -0,0 +1,3 @@
+{
+  "presets": [["minify", { "builtIns": false }]]
+}

libs/providers/unleash-web/jest.config.ts

@@ -0,0 +1,10 @@
+/* eslint-disable */
+export default {
+  displayName: 'providers-unleash-web',
+  preset: '../../../jest.preset.js',
+  transform: {
+    '^.+\\.[tj]s$': ['ts-jest', { tsconfig: '<rootDir>/tsconfig.spec.json' }],
+  },
+  moduleFileExtensions: ['ts', 'js', 'html'],
+  coverageDirectory: '../../../coverage/libs/providers/unleash-web',
+};

libs/providers/unleash-web/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "@openfeature/unleash-web-provider",
+  "version": "0.0.1",
+  "dependencies": {
+    "tslib": "^2.3.0",
+    "unleash-proxy-client": "^3.6.1"
+  },
+  "main": "./src/index.js",
+  "typings": "./src/index.d.ts",
+  "scripts": {
+    "publish-if-not-exists": "cp $NPM_CONFIG_USERCONFIG .npmrc && if [ \"$(npm show $npm_package_name@$npm_package_version version)\" = \"$(npm run current-version -s)\" ]; then echo 'already published, skipping'; else npm publish --access public; fi",
+    "current-version": "echo $npm_package_version"
+  },
+  "peerDependencies": {
+    "@openfeature/web-sdk": "^1.0.0"
+  }
+}

libs/providers/unleash-web/project.json

@@ -0,0 +1,77 @@
+{
+  "name": "providers-unleash-web",
+  "$schema": "../../../node_modules/nx/schemas/project-schema.json",
+  "sourceRoot": "libs/providers/unleash-web/src",
+  "projectType": "library",
+  "targets": {
+    "publish": {
+      "executor": "nx:run-commands",
+      "options": {
+        "command": "npm run publish-if-not-exists",
+        "cwd": "dist/libs/providers/unleash-web"
+      },
+      "dependsOn": [
+        {
+          "projects": "self",
+          "target": "package"
+        }
+      ]
+    },
+    "lint": {
+      "executor": "@nx/linter:eslint",
+      "outputs": ["{options.outputFile}"],
+      "options": {
+        "lintFilePatterns": ["libs/providers/unleash-web/**/*.ts", "libs/providers/unleash-web/package.json"]
+      }
+    },
+    "test": {
+      "executor": "@nx/jest:jest",
+      "outputs": ["{workspaceRoot}/coverage/{projectRoot}"],
+      "options": {
+        "jestConfig": "libs/providers/unleash-web/jest.config.ts",
+        "passWithNoTests": true
+      },
+      "configurations": {
+        "ci": {
+          "ci": true,
+          "codeCoverage": true
+        }
+      }
+    },
+    "package": {
+      "executor": "@nx/rollup:rollup",
+      "outputs": ["{options.outputPath}"],
+      "options": {
+        "project": "libs/providers/unleash-web/package.json",
+        "outputPath": "dist/libs/providers/unleash-web",
+        "entryFile": "libs/providers/unleash-web/src/index.ts",
+        "tsConfig": "libs/providers/unleash-web/tsconfig.lib.json",
+        "buildableProjectDepsInPackageJsonType": "dependencies",
+        "updateBuildableProjectDepsInPackageJson": true,
+        "compiler": "tsc",
+        "generateExportsField": true,
+        "umdName": "unleash-web",
+        "external": "all",
+        "format": ["cjs", "esm"],
+        "assets": [
+          {
+            "glob": "package.json",
+            "input": "./assets",
+            "output": "./src/"
+          },
+          {
+            "glob": "LICENSE",
+            "input": "./",
+            "output": "./"
+          },
+          {
+            "glob": "README.md",
+            "input": "./libs/providers/unleash-web",
+            "output": "./"
+          }
+        ]
+      }
+    }
+  },
+  "tags": []
+}

libs/providers/unleash-web/src/index.ts

@@ -0,0 +1 @@
+export * from './lib/unleash-web-provider';

libs/providers/unleash-web/src/lib/test-logger.ts

@@ -0,0 +1,39 @@
+/**
+ * TestLogger is a logger build for testing purposes.
+ * This is not ready to be production ready, so please avoid using it.
+ */
+export default class TestLogger {
+  public inMemoryLogger: Record<string, string[]> = {
+    error: [],
+    warn: [],
+    info: [],
+    debug: [],
+  };
+
+  error(...args: unknown[]): void {
+    this.inMemoryLogger['error'].push(args.join(' '));
+  }
+
+  warn(...args: unknown[]): void {
+    this.inMemoryLogger['warn'].push(args.join(' '));
+  }
+
+  info(...args: unknown[]): void {
+    console.log(args);
+    this.inMemoryLogger['info'].push(args.join(' '));
+  }
+
+  debug(...args: unknown[]): void {
+    console.log(args);
+    this.inMemoryLogger['debug'].push(args.join(' '));
+  }
+
+  reset() {
+    this.inMemoryLogger = {
+      error: [],
+      warn: [],
+      info: [],
+      debug: [],
+    };
+  }
+}