From f678d7f04afa80d4b575d7f8c8f77f5cd912d946 Mon Sep 17 00:00:00 2001
From: Piras314 <92357316+Piras314@users.noreply.github.com>
Date: Fri, 14 Jun 2024 17:50:15 -0400
Subject: [PATCH] Update changelog.js

---
 Tools/changelog/changelog.js | 209 +++++++++++++++++++++++++----------
 1 file changed, 153 insertions(+), 56 deletions(-)

diff --git a/Tools/changelog/changelog.js b/Tools/changelog/changelog.js
index fa5732e06d9..8396b12db70 100644
--- a/Tools/changelog/changelog.js
+++ b/Tools/changelog/changelog.js
@@ -1,57 +1,154 @@
 // From https://github.com/DeltaV-Station/Delta-v/
-name: PR Changelogs
-concurrency: commit_action
-on:
-  pull_request_target:
-    types: [closed]
-
-env:
-  GITHUB_TOKEN: ${{ secrets.BOT_TOKEN }}
-  CHANGELOG_DIR: ${{ vars.CHANGELOG_DIR }}
-  PR_NUMBER: ${{ github.event.number }}
-
-jobs:
-  changelog:
-    runs-on: self-hosted
-    if: github.event.pull_request.merged == true
-    permissions:
-      contents: write
-    steps:
-      - name: Checkout Master
-        uses: actions/checkout@v3
-        with:
-          token: ${{ secrets.BOT_TOKEN }}
-          ref: "${{ vars.CHANGELOG_BRANCH }}"
-
-      - name: Setup Git
-        run: |
-          git config --global user.name "${{ vars.CHANGELOG_USER }}"
-          git config --global user.email "${{ vars.CHANGELOG_EMAIL }}"
-        shell: bash
-
-      - name: Setup Node
-        uses: actions/setup-node@v3
-        with:
-          node-version: 18.x
-
-      - name: Install Dependencies
-        run: |
-          cd "Tools/changelog"
-          npm install
-        shell: bash
-        continue-on-error: true
-
-      - name: Generate Changelog
-        run: |
-          cd "Tools/changelog"
-          node changelog.js
-        shell: bash
-        continue-on-error: true
-
-      - name: Commit Changelog
-        run: |
-          git add *.yml
-          git commit -m "${{ vars.CHANGELOG_MESSAGE }} (#${{ env.PR_NUMBER }})"
-          git push
-        shell: bash
-        continue-on-error: true
+// Dependencies
+const fs = require("fs");
+const yaml = require("js-yaml");
+const axios = require("axios");
+
+// Use GitHub token if available
+if (process.env.GITHUB_TOKEN) axios.defaults.headers.common["Authorization"] = `Bearer ${process.env.GITHUB_TOKEN}`;
+
+// Regexes
+const HeaderRegex = /^\s*(?::cl:|🆑) *([a-z0-9_\- ]+)?\s+/im; // :cl: or 🆑 [0] followed by optional author name [1]
+const EntryRegex = /^ *[*-]? *(add|remove|tweak|fix): *([^\n\r]+)\r?$/img; // * or - followed by change type [0] and change message [1]
+const CommentRegex = /<!--.*?-->/gs; // HTML comments
+
+// Main function
+async function main() {
+    // Get PR details
+    const pr = await axios.get(`https://api.github.com/repos/${process.env.GITHUB_REPOSITORY}/pulls/${process.env.PR_NUMBER}`);
+    const { merged_at, body, user } = pr.data;
+
+    // Remove comments from the body
+    commentlessBody = body.replace(CommentRegex, '');
+
+    // Get author
+    const headerMatch = HeaderRegex.exec(commentlessBody);
+    if (!headerMatch) {
+        console.log("No changelog entry found, skipping");
+        return;
+    }
+
+    let author = headerMatch[1];
+    if (!author) {
+        console.log("No author found, setting it to author of the PR\n");
+        author = user.login;
+    }
+
+    // Get all changes from the body
+    const entries = getChanges(commentlessBody);
+
+
+    // Time is something like 2021-08-29T20:00:00Z
+    // Time should be something like 2023-02-18T00:00:00.0000000+00:00
+    let time = merged_at;
+    if (time)
+    {
+        time = time.replace("z", ".0000000+00:00").replace("Z", ".0000000+00:00");
+    }
+    else
+    {
+        console.log("Pull request was not merged, skipping");
+        return;
+    }
+
+
+    // Construct changelog yml entry
+    const entry = {
+        author: author,
+        changes: entries,
+        id: getHighestCLNumber() + 1,
+        time: time,
+    };
+
+    // Write changelogs
+    writeChangelog(entry);
+
+    console.log(`Changelog updated with changes from PR #${process.env.PR_NUMBER}`);
+}
+
+
+// Code chunking
+
+// Get all changes from the PR body
+function getChanges(body) {
+    const matches = [];
+    const entries = [];
+
+    for (const match of body.matchAll(EntryRegex)) {
+        matches.push([match[1], match[2]]);
+    }
+
+    if (!matches)
+    {
+        console.log("No changes found, skipping");
+        return;
+    }
+
+
+    // Check change types and construct changelog entry
+    matches.forEach((entry) => {
+        let type;
+
+        switch (entry[0].toLowerCase()) {
+            case "add":
+                type = "Add";
+                break;
+            case "remove":
+                type = "Remove";
+                break;
+            case "tweak":
+                type = "Tweak";
+                break;
+            case "fix":
+                type = "Fix";
+                break;
+            default:
+                break;
+        }
+
+        if (type) {
+            entries.push({
+                type: type,
+                message: entry[1],
+            });
+        }
+    });
+
+    return entries;
+}
+
+// Get the highest changelog number from the changelogs file
+function getHighestCLNumber() {
+    // Read changelogs file
+    const file = fs.readFileSync(`../../${process.env.CHANGELOG_DIR}`, "utf8");
+
+    // Get list of CL numbers
+    const data = yaml.load(file);
+    const entries = data && data.Entries ? Array.from(data.Entries) : [];
+    const clNumbers = entries.map((entry) => entry.id);
+
+    // Return highest changelog number
+    return Math.max(...clNumbers, 0);
+}
+
+function writeChangelog(entry) {
+    let data = { Entries: [] };
+
+    // Create a new changelogs file if it does not exist
+    if (fs.existsSync(`../../${process.env.CHANGELOG_DIR}`)) {
+        const file = fs.readFileSync(`../../${process.env.CHANGELOG_DIR}`, "utf8");
+        data = yaml.load(file);
+    }
+
+    data.Entries.push(entry);
+
+    // Write updated changelogs file
+    fs.writeFileSync(
+        `../../${process.env.CHANGELOG_DIR}`,
+        "Entries:\n" +
+            yaml.dump(data.Entries, { indent: 2 }).replace(/^---/, "")
+    );
+}
+
+// Run main
+main();