Custom HTML parsing for Rucphen RTV

Add a very dirty html parser to get the schedule for Rucphen RTV.

README.md

@@ -1,7 +1,10 @@
 # zwfm-metadata
-Pushes metadata to icecast servers and generates RDS on https://rds.zuidwestfm.nl/. 
+This repository contains a metadata management solution specifically designed for ZuidWest FM in the Netherlands. It includes two small services: one that pushes metadata to Icecast servers and another that generates program information for various purposes, including RDS (Radio Data System).
+
+These services operate on https://rds.zuidwestfm.nl/ and https://rds-rucphen.zuidwestfm.nl/. 
 
 - **rds.js**: Generates RDS data. Use it with `?ps` to display the programme service or `?rt` to display the radio text. Defaults to radio text for legacy integrations.
+- **rds-rucphen.js**: Generates RDS data for Rucphen RTV. Custom implementation based on html parsing of the website rucphenrtv.nl.
 - **push.js**: Pushes metadata to Icecast servers. Use this with the scheduler of Cloudflare Workers to update the metadata as often as you want.
 
-Both scripts run serverless as Cloudflare Worker.
+All scripts run serverless as Cloudflare Worker.

rds-rucphen.js

@@ -0,0 +1,112 @@
+addEventListener('fetch', event => {
+  event.respondWith(handleRequest(event.request))
+})
+
+async function handleRequest (request) {
+  const url = 'https://rucphenrtv.nl/programmering/'
+
+  try {
+    // Fetch the HTML content from the URL
+    const response = await fetch(url)
+    const html = await response.text()
+
+    // Decode HTML entities in the fetched HTML
+    const decodedHtml = decodeHtmlEntities(html)
+
+    // Get the current time in Europe/Amsterdam timezone
+    const now = new Date().toLocaleString('en-US', { timeZone: 'Europe/Amsterdam' })
+    const currentDate = new Date(now)
+    const currentDayIndex = currentDate.getDay()
+    const daysOfWeek = ['Zondag', 'Maandag', 'Dinsdag', 'Woensdag', 'Donderdag', 'Vrijdag', 'Zaterdag']
+    const currentDay = daysOfWeek[currentDayIndex]
+    const currentHour = currentDate.toTimeString().slice(0, 5)
+
+    // Log the current day and time for debugging
+    console.log(`Current day: ${currentDay}`)
+    console.log(`Current time: ${currentHour}`)
+
+    // Regular expression to capture the current day's section
+    const dayRegex = new RegExp(`<a[^>]*class="elementor-accordion-title"[^>]*>\\s*${currentDay}\\s*</a>[\\s\\S]*?<div[^>]*class="elementor-tab-content[^>]*"[^>]*>([\\s\\S]*?)</div>`, 'i')
+    const dayMatch = decodedHtml.match(dayRegex)
+
+    if (!dayMatch) {
+      console.log('Schedule section not found for today.')
+      return new Response('Error: Unable to find the schedule for today.', { status: 500 })
+    }
+
+    // Extract the schedule for the current day
+    const scheduleHtml = dayMatch[1]
+
+    // Log the extracted HTML for debugging
+    console.log(`Extracted schedule HTML: ${scheduleHtml}`)
+
+    // Decode HTML entities in the extracted schedule
+    const decodedScheduleHtml = decodeHtmlEntities(scheduleHtml)
+
+    // Regular expression to find program entries
+    const programRegex = /(\d{2}:\d{2})\s*–\s*(\d{2}:\d{2})\s*\|\s*([^<\n\r]*)/g
+    let match
+    let currentProgramName = 'No program scheduled for the current time.'
+
+    while ((match = programRegex.exec(decodedScheduleHtml)) !== null) {
+      const startTime = match[1]
+      const endTime = match[2]
+      const programName = match[3].trim()
+
+      // Convert times to Date objects for comparison
+      const startTimeParts = startTime.split(':').map(Number)
+      const endTimeParts = endTime.split(':').map(Number)
+
+      const startTimeDate = new Date(currentDate)
+      startTimeDate.setHours(startTimeParts[0], startTimeParts[1], 0, 0)
+
+      const endTimeDate = new Date(currentDate)
+      endTimeDate.setHours(endTimeParts[0], endTimeParts[1], 0, 0)
+
+      const currentHourParts = currentHour.split(':').map(Number)
+      const currentHourDate = new Date(currentDate)
+      currentHourDate.setHours(currentHourParts[0], currentHourParts[1], 0, 0)
+
+      // Adjust for overnight programs that might end past midnight
+      if (endTimeDate < startTimeDate) {
+        endTimeDate.setDate(endTimeDate.getDate() + 1)
+      }
+
+      // Log the times for debugging
+      console.log(`Comparing ${currentHourDate} with ${startTimeDate} - ${endTimeDate}`)
+
+      if (currentHourDate >= startTimeDate && currentHourDate < endTimeDate) {
+        currentProgramName = programName
+        break
+      }
+    }
+
+    return new Response(currentProgramName, {
+      status: 200,
+      headers: {
+        'Content-Type': 'text/plain; charset=UTF-8'
+      }
+    })
+  } catch (error) {
+    console.log(`Error: ${error.message}`)
+    return new Response(`Error: ${error.message}`, { status: 500 })
+  }
+}
+
+// Function to decode HTML entities
+function decodeHtmlEntities (str) {
+  const entities = {
+    '&#8211;': '–',
+    '&#8217;': "'",
+    '&#8220;': '“',
+    '&#8221;': '”',
+    '&amp;': '&',
+    '&lt;': '<',
+    '&gt;': '>',
+    '&quot;': '"',
+    '&nbsp;': ' '
+    // Add more entities if needed
+  }
+
+  return str.replace(/&#?\w+;/g, match => entities[match] || match)
+}