76 lines
No EOL
2.9 KiB
JavaScript
76 lines
No EOL
2.9 KiB
JavaScript
// preset-manager.js - Verwaltung der Radio-Sender
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window.PresetManager = {
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presets: [],
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// Lädt Presets aus LocalStorage oder der JSON-Datei
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async load(callback) {
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this.presets = JSON.parse(localStorage.getItem('presets')) || [];
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if (this.presets.length === 0) {
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try {
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const response = await fetch('webradio_presets.json');
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if (!response.ok) throw new Error('Datei konnte nicht geladen werden');
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this.presets = await response.json();
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this.save();
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} catch (error) {
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if (window.UI) window.UI.showAlert("Fehler", 'Fehler beim Laden der Presets: ' + error.message);
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}
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}
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if (callback) callback(this.presets);
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},
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save() {
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localStorage.setItem('presets', JSON.stringify(this.presets));
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},
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// --- EXPORT/IMPORT (Gzip/Base64) ---
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async generateExportCode() {
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try {
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if (!this.presets || this.presets.length === 0) return;
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const compactData = this.presets.map(p => [p.name, p.url]);
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const jsonString = JSON.stringify(compactData);
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const stream = new Blob([jsonString]).stream();
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const compressedStream = stream.pipeThrough(new CompressionStream('gzip'));
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const response = new Response(compressedStream);
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const buffer = await response.arrayBuffer();
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const base64String = btoa(String.fromCharCode(...new Uint8Array(buffer)));
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const exportField = document.getElementById('export-string-field');
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if (exportField) exportField.value = base64String;
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} catch (e) {
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console.error("Export-Fehler:", e);
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}
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},
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async importFromString(code) {
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try {
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const binary = atob(code);
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const bytes = Uint8Array.from(binary, c => c.charCodeAt(0));
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const stream = new Blob([bytes]).stream();
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const decompressedStream = stream.pipeThrough(new DecompressionStream('gzip'));
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const response = new Response(decompressedStream);
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const resultText = await response.text();
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const importedArray = JSON.parse(resultText);
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this.presets = importedArray.map(item => ({ name: item[0], url: item[1] }));
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this.save();
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location.reload();
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} catch (e) {
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console.error("Import-Fehler:", e);
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if (window.UI) window.UI.showAlert("Fehler", "Code ungültig oder beschädigt!");
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}
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},
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exportToFile() {
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const presetsJSON = JSON.stringify(this.presets, null, 2);
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const blob = new Blob([presetsJSON], { type: 'application/json' });
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const url = URL.createObjectURL(blob);
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const a = document.createElement('a');
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a.href = url;
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a.download = 'radio_presets.json';
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document.body.appendChild(a);
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a.click();
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document.body.removeChild(a);
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URL.revokeObjectURL(url);
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}
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}; |