esmp3/include/playlist.h

#pragma once
#include <Arduino.h>
#include <vector>
#include <ArduinoJson.h>
#include "main.h"
#include "http_client_wrapper.h"

enum PlaylistPersistence {
	PERSIST_NONE,
	PERSIST_TEMPORARY,
	PERSIST_PERMANENTLY
};

struct PlaylistEntry {
	String filename;
	String title;
	String id;
	
	bool operator<(PlaylistEntry p) { return title < p.title; }
};

class Playlist {
private:
	uint32_t _position = 0;
	uint32_t _current_track = 0;
	bool _started = false;
	bool _shuffled = false;
	std::vector<PlaylistEntry> _files;
	String _title = "";
	String _path;
	void _add_path(String path);
	void _examine_http_url(String url);
	void _parse_rss(HTTPClientWrapper* http);
	void _parse_m3u(HTTPClientWrapper* http);
	void _parse_pls(HTTPClientWrapper* http);
public:
	PlaylistPersistence persistence = PERSIST_TEMPORARY;
	Playlist(String path);
	void start();
	uint16_t get_file_count();
	bool has_track_next();
	bool has_track_prev();
	bool track_next();
	bool track_prev();
	void track_restart();
	bool set_track(uint8_t track);
	void set_track_by_id(String id);
	void reset();
	String path();
	bool is_empty();
	bool get_current_file(String* dst);
	String get_current_track_id();
	uint32_t get_position();
	void set_position(uint32_t p);
	void shuffle(uint8_t random_offset=0);
	void advent_shuffle(uint8_t day);
	bool is_fresh();
	void dump();
	void json(JsonObject json);
};