From 106efcc35fe6deab12047fef3f6b606cb79dac87 Mon Sep 17 00:00:00 2001
From: karishma-chawla <74574173+karishma-chawla@users.noreply.github.com>
Date: Tue, 3 Sep 2024 18:41:18 -0700
Subject: [PATCH] Add command to automate issue assignment

Signed-off-by: karishma-chawla <74574173+karishma-chawla@users.noreply.github.com>
---
 .github/scripts/radius-bot.js     | 75 +++++++++++++++++++++++++++++++
 .github/workflows/radius-bot.yaml | 24 ++++++++++
 2 files changed, 99 insertions(+)
 create mode 100644 .github/scripts/radius-bot.js
 create mode 100644 .github/workflows/radius-bot.yaml

diff --git a/.github/scripts/radius-bot.js b/.github/scripts/radius-bot.js
new file mode 100644
index 00000000..72c6a55e
--- /dev/null
+++ b/.github/scripts/radius-bot.js
@@ -0,0 +1,75 @@
+/*
+Copyright 2023 The Radius Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+module.exports = async ({ github, context }) => {
+    if (context.eventName === 'issue_comment' && context.payload.action === 'created') {
+        try {
+            await handleIssueCommentCreate({ github, context });
+        } catch (error) {
+            console.log(`[handleIssueCommentCreate] unexpected error: ${error}`);
+        }
+    }
+}
+
+// Handle issue comment create event.
+async function handleIssueCommentCreate({ github, context }) {
+    const payload = context.payload;
+    const issue = context.issue;
+    const isFromPulls = !!payload.issue.pull_request;
+    const commentBody = payload.comment.body;
+    const username = context.actor;
+
+    if (!commentBody) {
+        console.log('[handleIssueCommentCreate] comment body not found, exiting.');
+        return;
+    }
+
+    const commandParts = commentBody.split(/\s+/);
+    const command = commandParts.shift();
+
+    switch (command) {
+        case '/assign':
+            await cmdAssign(github, issue, isFromPulls, username);
+            break;
+        default:
+            console.log(`[handleIssueCommentCreate] command ${command} not found, exiting.`);
+            break;
+    }
+}
+
+/**
+ * Assign issue to the user who commented.
+ * @param {*} github GitHub object reference
+ * @param {*} issue GitHub issue object
+ * @param {*} isFromPulls is the workflow triggered by a pull request?
+ * @param {*} username is the user who trigger the command
+ */
+async function cmdAssign(github, issue, isFromPulls, username) {
+    if (isFromPulls) {
+        console.log('[cmdAssign] pull requests not supported, skipping command execution.');
+        return;
+    } else if (issue.assignees && issue.assignees.length !== 0) {
+        console.log('[cmdAssign] issue already has assignees, skipping command execution.');
+        return;
+    }
+
+    await github.rest.issues.addAssignees({
+        owner: issue.owner,
+        repo: issue.repo,
+        issue_number: issue.number,
+        assignees: [username],
+    });
+}
diff --git a/.github/workflows/radius-bot.yaml b/.github/workflows/radius-bot.yaml
new file mode 100644
index 00000000..6b343d1b
--- /dev/null
+++ b/.github/workflows/radius-bot.yaml
@@ -0,0 +1,24 @@
+name: radius-bot
+
+on:
+  issue_comment:
+    types: [created]
+
+jobs:
+  radius-bot:
+    name: Run Radius Bot script
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+        with:
+          sparse-checkout: |
+            .github/scripts/radius-bot.js
+          sparse-checkout-cone-mode: false
+      - name: Comment analyzer
+        uses: actions/github-script@v7
+        with:
+          github-token: ${{ secrets.GH_RAD_CI_BOT_PAT }}
+          script: |
+            const script = require('./.github/scripts/radius-bot.js')
+            await script({github, context})