From 4be364ce2ee977eead4deccecbe2ca10eb218d88 Mon Sep 17 00:00:00 2001
From: Muaz Ahmad <mahmad2000@protonmail.com>
Date: Tue, 22 Aug 2023 18:20:09 +0500
Subject: [PATCH] m3u8 parsing and segment fetch queue

---
 hls-player.js | 30 +++++++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/hls-player.js b/hls-player.js
index 2086af9..617e372 100644
--- a/hls-player.js
+++ b/hls-player.js
@@ -7,16 +7,40 @@ class PlaylistLoader {
 		this.refresh_interval = null;
 		this.new_segments = [];
 	}
+
 	fetch_playlist() {
 		var xmlHttp = new XMLHttpRequest();
-		xmlHttp.onreadystatechange = function() {
+		xmlHttp.onreadystatechange = ( function() {
 			if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {
-				console.log(xmlHttp.responseText);
+				this.parse_playlist(xmlHttp.responseText);
 			}
-		}
+		} ).bind(this)
 		xmlHttp.open("GET", this.playlist_src, true);
 		xmlHttp.send(null);
 	}
+
+	parse_playlist(playlist_content) {
+		var lines = playlist_content.split('\n');
+		var segments = [];
+		var segment_block_flag = this.last_segment === null ? false : true;
+		for (var i = 0; i < lines.length; i++) {
+			if (lines[i].startsWith("#")) {
+				if (lines[i].startsWith("EXT-X-TARGETDURATION", 1)) {
+					this.refresh_interval = parseFloat(lines[i].split(':')[1]);
+				}
+			} else {
+				if (segment_block_flag || lines[i] == '') {
+					if (lines[i] == this.last_segment) {
+						segment_block_flag = false;
+					}
+				} else {
+					segments.push(lines[i]);
+				}
+			}
+		}
+		this.new_segments = segments;
+		this.last_segment = segments.at(-1);
+}
 }
 
 var test = new PlaylistLoader();