feat: add core modules - dienstService, whatsappApi, messageHandler, webhook server

src/messageHandler.js

@@ -0,0 +1,62 @@
+const { findDienst, getPngFilePaths } = require('./dienstService')
+const { sendTextMessage, sendImageMessage, notifyAdmin } = require('./whatsappApi')
+
+const BOT_NAME = (process.env.BOT_NAME || 'EdGpt').toLowerCase()
+const ALLOWED_GROUP = process.env.ALLOWED_GROUP
+
+function extractDienstnummer(body) {
+  const match = body.match(/\b(\d{4})\b/)
+  return match ? match[1] : null
+}
+
+function isBotMentioned(message) {
+  if (message._data?.mentionedJidList?.length > 0) {
+    return true
+  }
+  if (message.body && message.body.toLowerCase().includes(`@${BOT_NAME}`)) {
+    return true
+  }
+  return false
+}
+
+async function handleWebhook(payload) {
+  if (payload.dataType !== 'message') return
+  if (payload.sessionId !== process.env.WHATSAPP_SESSION) return
+
+  const message = payload.data?.message
+  if (!message) return
+  if (message.fromMe) return
+  if (message.from !== ALLOWED_GROUP) return
+  if (!isBotMentioned(message)) return
+
+  const dienstnummer = extractDienstnummer(message.body || '')
+  if (!dienstnummer) return
+
+  const author = message.author
+  if (!author) return
+
+  const dienst = findDienst(dienstnummer)
+  if (!dienst) {
+    await sendTextMessage(author, `Dienstnummer ${dienstnummer} niet gevonden.`)
+    return
+  }
+
+  const pngPaths = getPngFilePaths(dienst)
+  if (!pngPaths || pngPaths.length === 0) {
+    await sendTextMessage(author, `Geen pagina's gevonden voor dienst ${dienstnummer}.`)
+    return
+  }
+
+  for (const pngPath of pngPaths) {
+    const filename = pngPath.split('/').pop()
+    try {
+      await sendImageMessage(author, pngPath, filename)
+    } catch (err) {
+      const errorMsg = `Fout bij verzenden ${filename} naar ${author}: ${err.message}`
+      console.error(errorMsg)
+      await notifyAdmin(errorMsg)
+    }
+  }
+}
+
+module.exports = { handleWebhook }