Add Markdown dns checking, and persistant logging

.gitignore

@@ -3,3 +3,4 @@ config.json
 data/state.json
 old.js
 package-lock.json
+data/error.log

index.js

@@ -1,18 +1,31 @@
 const axios = require('axios');
 const fs = require('fs');
 const path = require('path');
+const dns = require('dns');
 
 // --- CONFIG ---
 const pollIntervalMs = 30 * 1000; // 30 seconds
 const configPath = path.join(__dirname, 'config.json');
 const statePath = path.join(__dirname, './data/state.json');
+const errorLogPath = path.join(__dirname, './data/error.log');
+
+// --- ERROR LOGGER ---
+function logError(message) {
+  const timestamp = new Date().toLocaleString('en-US', {
+    timeZone: 'America/Los_Angeles'
+  });
+  const line = `[${timestamp}] ${message}\n`;
+  fs.appendFileSync(errorLogPath, line);
+  console.error(message);
+}
+
 
 // Load configs
 let configs;
 try {
   configs = JSON.parse(fs.readFileSync(configPath, 'utf8'));
 } catch (error) {
-  console.error('❗ Failed to load config.json:', error.message);
+  logError('❗ Failed to load config.json: ' + error.message);
   process.exit(1);
 }
 
@@ -22,7 +35,7 @@ if (fs.existsSync(statePath)) {
   try {
     state = JSON.parse(fs.readFileSync(statePath, 'utf8'));
   } catch (error) {
-    console.error('❗ Failed to load state.json:', error.message);
+    logError('❗ Failed to load state.json: ' + error.message);
     process.exit(1);
   }
 }
@@ -37,13 +50,31 @@ function normalizeContent(content) {
   return content.replace(/\r\n/g, '\n').trim();
 }
 
+// Check if the host of a URL is reachable
+async function checkHostAvailability(url) {
+  const { hostname } = new URL(url);
+  return new Promise((resolve) => {
+    dns.lookup(hostname, (err) => {
+      if (err) {
+        logError(`🌐 Host unreachable: ${hostname} – ${err.message}`);
+        resolve(false);
+      } else {
+        resolve(true);
+      }
+    });
+  });
+}
+
 // Fetch markdown content
 async function fetchMarkdown(url) {
+  const hostOK = await checkHostAvailability(url);
+  if (!hostOK) return '';
+
   try {
     const { data } = await axios.get(url);
     return data;
   } catch (error) {
-    console.error('❗ Error fetching markdown:', error.message);
+    logError(`❗ Error fetching markdown from ${url}: ${error.message}`);
     return '';
   }
 }
@@ -59,10 +90,10 @@ async function createNewMessage(config) {
       saveState();
       console.log(`✅ [${config.name}] New message sent and ID saved.`);
     } else {
-      console.error(`❗ [${config.name}] Failed to get message ID.`);
+      logError(`❗ [${config.name}] Failed to get message ID.`);
     }
   } catch (error) {
-    console.error(`❌ [${config.name}] Error sending new message:`, error.message);
+    logError(`❌ [${config.name}] Error sending new message: ${error.message}`);
   }
 }
 
@@ -75,11 +106,11 @@ async function updateMessage(config) {
     console.log(`✅ [${config.name}] Message updated.`);
   } catch (error) {
     if (error.response && error.response.status === 404) {
-      console.error(`⚠️ [${config.name}] Message not found (deleted?). Creating new...`);
+      logError(`⚠️ [${config.name}] Message not found (deleted?). Creating new...`);
       state[config.name].messageId = '';
       await createNewMessage(config);
     } else {
-      console.error(`❌ [${config.name}] Error updating message:`, error.message);
+      logError(`❌ [${config.name}] Error updating message: ${error.message}`);
     }
   }
 }
@@ -92,10 +123,10 @@ async function validateExistingMessage(config) {
     console.log(`✅ [${config.name}] Existing message validated.`);
   } catch (error) {
     if (error.response && error.response.status === 404) {
-      console.error(`⚠️ [${config.name}] Message not found. Will create new.`);
+      logError(`⚠️ [${config.name}] Message not found. Will create new.`);
       state[config.name].messageId = '';
     } else {
-      console.error(`❗ [${config.name}] Error validating message:`, error.message);
+      logError(`❗ [${config.name}] Error validating message: ${error.message}`);
     }
   }
 }

package.json

@@ -3,7 +3,8 @@
   "version": "1.0.5",
   "main": "index.js",
   "scripts": {
-    "test": "node index.js"
+    "test": "node index.js",
+    "run": "node index.js"
   },
   "keywords": [],
   "author": "Sophia Atkinson",
@@ -11,6 +12,7 @@
   "description": "",
   "dependencies": {
     "axios": "^1.9.0",
+    "dns": "^0.2.2",
     "fs": "^0.0.1-security",
     "path": "^0.12.7"
   }