feat: bring github (#39)

* wip

* Update github/lib.test.w

* Update github/lib.test.w

* updates

* updates

* updated README

* ignore test due to winglang/wing#5408

* adding description to github/package.json

* adding author to github/package.json

---------

Co-authored-by: Eyal Keren <[email protected]>

.github/workflows/github-pull.yaml

@@ -0,0 +1,29 @@
+name: github-pull
+on:
+  pull_request:
+    paths:
+      - github/**
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          sparse-checkout: github
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18.x
+          registry-url: https://registry.npmjs.org
+      - name: Install winglang
+        run: npm i -g winglang
+      - name: Install dependencies
+        run: npm install --include=dev
+        working-directory: github
+      - name: Test
+        run: wing test
+        working-directory: github
+      - name: Pack
+        run: wing pack
+        working-directory: github

.github/workflows/github-release.yaml

@@ -0,0 +1,37 @@
+name: github-release
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - github/**
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          sparse-checkout: github
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18.x
+          registry-url: https://registry.npmjs.org
+      - name: Install winglang
+        run: npm i -g winglang
+      - name: Install dependencies
+        run: npm install --include=dev
+        working-directory: github
+      - name: Test
+        run: wing test
+        working-directory: github
+      - name: Pack
+        run: wing pack
+        working-directory: github
+      - name: Publish
+        run: npm publish --access=public --registry https://registry.npmjs.org --tag
+          latest *.tgz
+        working-directory: github
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

github/.gitignore

@@ -0,0 +1,2 @@
+target/
+node_modules/

github/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 Wing
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

github/README.md

@@ -0,0 +1,140 @@
+# github
+
+A Wing library for working with [GitHub Probot](https://github.com/probot/probot)
+
+
+## Prerequisites
+
+* [winglang](https://winglang.io).
+* [Install ngrok](https://ngrok.com/docs/getting-started/)
+
+
+## Installation
+
+`sh
+npm i @winglibs/github
+`
+
+## Usage
+
+This following application is a simple GitHub application that listens to created and reopened 
+pull requests, look for any `*.md` files that where changed and replace their content with their 
+uppercase version. 
+
+* It requires a GitHub application
+* Configured secrets 
+
+In order to start you need to create a GitHub application:
+
+### Create a GitHub App
+
+1. Goto https://github.com/settings/apps
+2. Click "New GitHub App" and complete form
+3. GitHub App Name
+4. Homepage URL: e.g. https://winglang.io
+5. Webhook:
+   1. Active: ✅
+   2. URL: http://this-will-change-automatically.com
+   3. Webhook secret: "this-is-a-bad-secret"
+6. Permissions -> Repository permissions:
+   1. Contents: Read and write 
+   2. Pull requests: Read and write
+7. Subscribe to events
+   1. Pull request
+   2. Push
+8. Save
+9. Notice the app id and save it 
+10. Generate & download a private key for the app 
+
+### Create Local Secret File 
+
+`github.ProbotApp` class expects three secrets on construction, the application id, private key (AKA `pem` file) and webhook secret.
+
+Storing the `pem` file in a json format is a bit tricky, because of the sensitivity to any white space chars and its structure.
+
+You can use `jq`` ([Install jq](https://jqlang.github.io/jq/)) to generate your `~/.wing/secret.json` with the following command:
+
+```sh
+jq --null-input \
+  --arg secret "this-is-a-bad-secret" \
+  --arg app_id "some-app-id" \
+  --arg private_key "$(cat '/path/to/private-key.pem')" \
+  '{"github.webhook_secret": $secret, "github.app_id": $app_id, "gitub.app_key": $private_key}' > ~/.wing/secrets.json
+```
+
+### `main.w`
+
+```js
+bring util;
+bring cloud;
+bring github;
+
+let uppercaseAllMarkdownFiles = inflight (ctx) => {
+  let repo = ctx.payload.repository;
+
+  // find all changed mdfiles by comparing the commits of the PR
+  let compare = ctx.octokit.repos.compareCommits(
+    owner: repo.owner.login,
+    repo: repo.name,
+    base: ctx.payload.pull_request.base.sha,
+    head: ctx.payload.pull_request.head.sha,
+  );
+
+  let mdFiles = MutMap<str>{};
+  for commit in compare.data.commits {
+    let commitContent = ctx.octokit.repos.getCommit(
+      owner: repo.owner.login,
+      repo: repo.name,
+      ref: ctx.payload.pull_request.head.ref,
+    );
+    if let files = commitContent.data.files {
+      for file in files {
+        if file.filename.endsWith(".md") &&
+         (file.status == "modified" || file.status == "added" || file.status == "changed") {
+          mdFiles.set(file.filename, file.sha);
+        }
+      }
+    }
+  }
+
+  // list over mdfiles and update them
+  for filename in mdFiles.keys() {
+    let contents = ctx.octokit.repos.getContent(
+      owner: repo.owner.login,
+      repo: repo.name,
+      path: filename,
+      ref: ctx.payload.pull_request.head.sha
+    );
+
+    let fileContents = util.base64Decode("{contents.data.content}");
+
+    ctx.octokit.repos.createOrUpdateFileContents(
+      owner: repo.owner.login,
+      repo: repo.name,
+      branch: ctx.payload.pull_request.head.ref,
+      sha: contents.data.sha,
+      path: filename,
+      message: "uppercase {filename}",
+      content: util.base64Encode(fileContents.uppercase())
+    );    
+  }
+};
+
+let appId = new cloud.Secret(name:"github.app_id") as "appId";
+let privateKey = new cloud.Secret(name:"gitub.app_key") as "privateKey";
+let webhookSecret = new cloud.Secret(name:"github.webhook_secret") as "webhookSecret";
+
+
+let markdown = new github.ProbotApp(
+  appId: appId,
+  privateKey: privateKey,
+  webhookSecret: webhookSecret,
+  onPullRequestOpened: uppercaseAllMarkdownFiles,
+  onPullRequestReopened: uppercaseAllMarkdownFiles
+);
+
+```
+
+## License
+
+This library is licensed under the [MIT License](./LICENSE).

github/lib.test.w

@@ -0,0 +1,72 @@
+bring util;
+bring cloud;
+bring "./lib.w" as probot;
+
+// see https://github.com/winglang/wing/issues/5408
+if false {
+
+  let handler = inflight (ctx) => {
+    let repo = ctx.payload.repository;
+
+    // find all changed mdfiles by comparing the commits of the PR
+    let compare = ctx.octokit.repos.compareCommits(
+      owner: repo.owner.login,
+      repo: repo.name,
+      base: ctx.payload.pull_request.base.sha,
+      head: ctx.payload.pull_request.head.sha,
+    );
+
+    let mdFiles = MutMap<str>{};
+    for commit in compare.data.commits {
+      let commitContent = ctx.octokit.repos.getCommit(
+        owner: repo.owner.login,
+        repo: repo.name,
+        ref: ctx.payload.pull_request.head.ref,
+      );
+      if let files = commitContent.data.files {
+        for file in files {
+          if file.filename.endsWith(".md") &&
+          (file.status == "modified" || file.status == "added" || file.status == "changed") {
+            mdFiles.set(file.filename, file.sha);
+          }
+        }
+      }
+    }
+
+    // list over mdfiles and update them
+    for filename in mdFiles.keys() {
+      let contents = ctx.octokit.repos.getContent(
+        owner: repo.owner.login,
+        repo: repo.name,
+        path: filename,
+        ref: ctx.payload.pull_request.head.sha
+      );
+
+      let fileContents = util.base64Decode("{contents.data.content}");
+
+      ctx.octokit.repos.createOrUpdateFileContents(
+        owner: repo.owner.login,
+        repo: repo.name,
+        branch: ctx.payload.pull_request.head.ref,
+        sha: contents.data.sha,
+        path: filename,
+        message: "uppercase {filename}",
+        content: util.base64Encode(fileContents.uppercase())
+      );    
+    }
+  };
+  let appId = new cloud.Secret(name:"github.app_id") as "appId";
+  let privateKey = new cloud.Secret(name:"gitub.app_key") as "privateKey";
+  let webhookSecret = new cloud.Secret(name:"github.webhook_secret") as "webhookSecret";
+
+
+  let markdown = new probot.ProbotApp(
+    appId: appId,
+    privateKey: privateKey,
+    webhookSecret: webhookSecret,
+    onPullRequestOpened: handler,
+    onPullRequestReopened: handler
+  );
+
+
+}