community goal system

server/src/services/communityGoalService.js

@@ -0,0 +1,95 @@
+const fs = require('fs');
+const path = require('path');
+const io = require('../globals/io');
+const logger = require('../globals/logger').child('communityGoalService');
+const { isAdmin } = require('./roleService');
+const { publishEvent } = require('./eventBus');
+
+const DATA_DIR = path.join(__dirname, '..', '..', 'data');
+const STORE_PATH = path.join(DATA_DIR, 'community-goal.json');
+const MAX_GOAL_LENGTH = 240;
+
+let cache = null;
+
+function loadStore() {
+  if (cache) return cache;
+  try {
+    const raw = fs.readFileSync(STORE_PATH, 'utf8');
+    cache = JSON.parse(raw);
+  } catch (err) {
+    if (err.code !== 'ENOENT') {
+      logger.warn('Failed to load community goal', err.message);
+    }
+    cache = null;
+  }
+  return cache;
+}
+
+function saveStore(next) {
+  fs.mkdirSync(DATA_DIR, { recursive: true });
+  fs.writeFileSync(STORE_PATH, `${JSON.stringify(next, null, 2)}\n`, 'utf8');
+  cache = next;
+}
+
+function normalizeText(input) {
+  if (typeof input !== 'string') return '';
+  return input.replace(/\s+/g, ' ').trim();
+}
+
+function getCommunityGoal() {
+  return loadStore();
+}
+
+function setCommunityGoal(text, meta = {}) {
+  const clean = normalizeText(text);
+  if (!clean) {
+    throw new Error('Goal text required');
+  }
+  if (clean.length > MAX_GOAL_LENGTH) {
+    throw new Error(`Goal too long (max ${MAX_GOAL_LENGTH} chars)`);
+  }
+  const payload = {
+    text: clean,
+    updatedAt: Date.now(),
+    updatedBy: meta.by || null,
+  };
+  saveStore(payload);
+  publishEvent({ source: 'communityGoal', type: 'communityGoal.updated', payload });
+  return payload;
+}
+
+function clearCommunityGoal(meta = {}) {
+  const payload = {
+    text: null,
+    updatedAt: Date.now(),
+    updatedBy: meta.by || null,
+  };
+  saveStore(payload);
+  publishEvent({ source: 'communityGoal', type: 'communityGoal.updated', payload });
+  return payload;
+}
+
+io.on('connection', (socket) => {
+  socket.on('communityGoal:set', ({ text } = {}, cb = () => {}) => {
+    if (!isAdmin(socket)) {
+      cb({ error: 'Not authorized' });
+      return;
+    }
+    try {
+      const result =
+        text == null || String(text).trim() === ''
+          ? clearCommunityGoal({ by: socket?.data?.user?.username || socket?.id })
+          : setCommunityGoal(text, { by: socket?.data?.user?.username || socket?.id });
+      cb({ success: true, goal: result });
+    } catch (err) {
+      cb({ error: err.message });
+    }
+  });
+});
+
+module.exports = {
+  getCommunityGoal,
+  setCommunityGoal,
+  clearCommunityGoal,
+  MAX_GOAL_LENGTH,
+};