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// SPDX-License-Identifier: Apache-2.0
import 'dart:async';
import 'dart:io';
import 'package:musicplayer/music_methods/mpd.dart';
class MPDTalker {
String host;
int port;
// Socket socket;
MPDTalker({
this.host: "localhost",
this.port: 6600,
});
/**
* Send a request to MPD and get the output as a String.
*/
Future<String> cmdStr(String cmd) {
Completer<String> com = new Completer<String>();
String data = "";
// Connect to MPD.
Socket.connect(host, port)
.then((Socket socket) {
// Write the command to MPD.
socket.write("$cmd\n");
// Listen for MPD.
socket.listen((List<int> chars) {
// Get the response.
String line = new String.fromCharCodes(chars);
data += line;
// Check if MPD is done sending data.
try {
if(_atEnd(line)) {
socket.close();
}
} catch(error, stacktrace) {
com.completeError(error, stacktrace);
}
},
onDone: () {
// Finish the future if there hasn't been an error.
if(!com.isCompleted) {
com.complete(data);
}
});
});
return com.future;
}
/**
* Check if MPD is done sending data.
*/
bool _atEnd(String str) {
//str.contains(new RegExp("ACK \[[0-9]?([0-9])@[0-9]?([0-9])\]"));
if(str.contains("ACK [")) {
for(String line in str.split("\n")) {
if(line.startsWith("ACK [")) {
throw new MPDError(line);
break;
}
}
}
return str.endsWith("OK\n");
}
Future cmd(String str) {
Completer com = new Completer();
cmdStr(str).then((String data) {
com.complete();
});
return com.future;
}
/**
* Send a request to MPD and get the output as a List of Strings.
*/
Future cmdList(String cmd) {
Completer com = new Completer();
// Get the data as a String, then turn it into a List.
cmdStr(cmd).then((String dataStr) {
List<String> data = [];
// For each line in the string:
for(String line in dataStr.split("\n")) {
// It will be separated into key/value pairs.
List<String> kv = line.split(":");
// We care about the value in this case, so add it to our list.
if(kv.length > 1)
data.add(kv[1].trim());
}
// Finished.
com.complete(data);
});
return com.future;
}
/**
* Send a request to MPD and get the output as a Map of Strings keyed to Strings.
*/
Future<Map<String, String>> cmdMap(String cmd) async{
Map<String, String> data = new Map<String, String>();
// Get the data as a String, then turn it into a Map.
String dataStr = await cmdStr(cmd);
// For every line in the String:
for(String line in dataStr.split("\n")) {
// Split it into key value pairs like a map.
List<String> kv = line.split(":");
if(kv.length > 1) {
// Add our keys/values to the map.
data[kv[0].trim()] = kv[1].trim();
}
}
return data;
}
/**
* Send a request to MPD and get the output as a List of Maps of Strings keyed to Strings.
*
* String newKey: The key that defines a new item in the list.
*/
Future<List<Map<String, String>>> cmdListMap(String cmd, {List<String>? newKeys}) async{
Completer com = new Completer();
// Set newKey's default to ["file"].
if(newKeys == null)
newKeys = ["file"];
List<Map<String, String>> data = [];
// Get the data as a String, then turn it into a List of Maps.
String dataStr = await cmdStr(cmd);
// For every line:
for(String line in dataStr.split("\n")) {
// Split it into keys/values.
List<String> kv = line.split(":");
if(kv.length > 1) {
// If the key is a new key, create a new Map in our list.
for(String key in newKeys) {
if(kv[0].trim() == key) {
data.add(Map<String, String>());
break;
}
}
// If we have Maps in our list, add the new item to the last Map.
if(data.isNotEmpty) {
data.last[kv[0].trim()] = kv[1].trim();
}
}
}
return data;
}
}
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