chore: check in firebase function used for populating caretaker app (#20120)

* chore: update caretaker resyncing script to include new fields.

New fields have been added to the synced information from each PR
in the caretaker application.  This change updates the resync script
to also include these new fields.

* chore: check in firebase function used for populating caretaker app

Previously the caretaker app's firebase function were only stored
locally on a computer rather than checked into github. Checking in
the currently running code provides us with a bit more resilience
long term around any issues with redeployments and deprecations.

(cherry picked from commit a79a71d)

Author: josephperrott

scripts/caretaking/firebase-functions/.gitignore

@@ -0,0 +1,8 @@
+## Compiled JavaScript files
+**/*.js
+**/*.js.map
+
+node_modules/
+
+firebase-debug.log
+ui-debug.log

scripts/caretaking/firebase-functions/firebase.json

@@ -0,0 +1,6 @@
+{
+  "functions": {
+    "source": "./",
+    "predeploy": "npm --prefix \"$RESOURCE_DIR\" run build"
+  }
+}

scripts/caretaking/firebase-functions/package.json

@@ -0,0 +1,21 @@
+{
+  "name": "caretaker-firebase-functions",
+  "scripts": {
+    "build": "tsc",
+    "serve": "yarn build && firebase emulators:start --only functions --project test-jperrott",
+    "deploy": "yarn build && firebase deploy --only functions --project test-jperrott"
+  },
+  "engines": {
+    "node": "12"
+  },
+  "main": "lib/index.js",
+  "dependencies": {
+    "firebase-admin": "^9.0.0",
+    "firebase-functions": "^3.8.0"
+  },
+  "devDependencies": {
+    "typescript": "^3.9.7",
+    "firebase-tools": "^8.6.0"
+  },
+  "private": true
+}

scripts/caretaking/firebase-functions/src/github-pr.ts

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+import * as functions from 'firebase-functions';
+import * as admin from 'firebase-admin';
+
+export const githubPR = functions.https.onRequest(async (req, resp) => {
+  const github = req.body;
+  const action = req.get('X-GitHub-Event');
+  const fullRepoName = github.repository.full_name.replace(/[\.\#\$\[\]]/g, '');
+  let actionTaken = 'None';
+  let prEffected = 'Unknown';
+  if (action === 'pull_request') {
+    const pullsRef = admin.database().ref(`/pulls/${fullRepoName}/${github.number}/github`);
+    const pull_request = github.pull_request;
+    pullsRef.update({
+      'branch': pull_request.base.ref,
+      'title': pull_request.title,
+      'pull_number': pull_request.number,
+      'state': pull_request.state,
+      'commit_sha': pull_request.head.sha,
+      'author': pull_request.user,
+      'labels': pull_request.labels,
+      'created_at': pull_request.created_at,
+      'updated_at': pull_request.updated_at,
+    });
+    prEffected = pull_request.number;
+    actionTaken = 'Updated PR';
+  } else if (action === 'status') {
+    const ref = admin
+        .database()
+        .ref(`/pulls/${fullRepoName}`)
+        .orderByChild('github/commit_sha')
+        .equalTo(github.sha);
+    await ref.once('value', snapshot => {
+      snapshot.forEach(d => {
+        d.child(`statuses`).ref.update({
+          [github.context.replace(/\W/g, '')]: {
+            context: github.context,
+            build_url: github.target_url,
+            status: github.state
+          }
+        });
+        prEffected = d.val().github.pull_number;
+        actionTaken = 'Updated Status';
+      });
+    });
+  }
+
+  const logAndOutputString = `Repo: ${fullRepoName} | PR: ${prEffected} | Action: ${actionTaken}`;
+  console.log(logAndOutputString);
+  resp.send(logAndOutputString);
+});

scripts/caretaking/firebase-functions/src/index.ts

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+import * as functions from 'firebase-functions';
+import * as admin from 'firebase-admin';
+
+admin.initializeApp(functions.config().firebase);
+
+export {githubPR} from './github-pr';

scripts/caretaking/firebase-functions/tsconfig.json

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+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "noImplicitReturns": true,
+    "noUnusedLocals": true,
+    "outDir": "lib",
+    "sourceMap": true,
+    "strict": true,
+    "target": "es2017",
+    "typeRoots": [],
+    "types": []
+  },
+  "compileOnSave": true,
+  "include": [
+    "src"
+  ]
+}