From 66f7825ed9638606665b9e61c6f8132de013da14 Mon Sep 17 00:00:00 2001
From: HsiangNianian <i@jyunko.cn>
Date: Tue, 13 Jan 2026 15:56:20 +0800
Subject: feat: implement download functionality with progress monitoring and
 version management

---
 ui/src/lib/DownloadMonitor.svelte | 92 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 ui/src/lib/DownloadMonitor.svelte

(limited to 'ui/src/lib')

diff --git a/ui/src/lib/DownloadMonitor.svelte b/ui/src/lib/DownloadMonitor.svelte
new file mode 100644
index 0000000..b2751fe
--- /dev/null
+++ b/ui/src/lib/DownloadMonitor.svelte
@@ -0,0 +1,92 @@
+<script lang="ts">
+  import { listen } from "@tauri-apps/api/event";
+  import { onMount, onDestroy } from "svelte";
+
+  export let visible = false;
+
+  interface DownloadEvent {
+    file: string;
+    downloaded: number; // in bytes
+    total: number; // in bytes
+    status: string;
+  }
+
+  let currentFile = "";
+  let progress = 0; // percentage 0-100
+  let totalFiles = 0;
+  let statusText = "Preparing...";
+  let unlistenProgress: () => void;
+  let unlistenStart: () => void;
+  let unlistenComplete: () => void;
+  let downloadedBytes = 0;
+  let totalBytes = 0;
+
+  onMount(async () => {
+    unlistenStart = await listen<number>("download-start", (event) => {
+        visible = true;
+        totalFiles = event.payload;
+        progress = 0;
+        statusText = "Starting download...";
+        currentFile = "";
+    });
+
+    unlistenProgress = await listen<DownloadEvent>("download-progress", (event) => {
+        const payload = event.payload;
+        currentFile = payload.file;
+        
+        // Simple file progress for now. Global progress would require tracking all files.
+        // For single file (Client jar), this is accurate.
+        downloadedBytes = payload.downloaded;
+        totalBytes = payload.total;
+        
+        statusText = payload.status;
+        
+        if (payload.total > 0) {
+            progress = (payload.downloaded / payload.total) * 100;
+        }
+    });
+
+    unlistenComplete = await listen("download-complete", () => {
+        statusText = "Done!";
+        progress = 100;
+        setTimeout(() => { visible = false; }, 2000);
+    });
+  });
+
+  onDestroy(() => {
+    if (unlistenProgress) unlistenProgress();
+    if (unlistenStart) unlistenStart();
+    if (unlistenComplete) unlistenComplete();
+  });
+  
+  function formatBytes(bytes: number) {
+      if (bytes === 0) return '0 B';
+      const k = 1024;
+      const sizes = ['B', 'KB', 'MB', 'GB'];
+      const i = Math.floor(Math.log(bytes) / Math.log(k));
+      return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
+  }
+</script>
+
+{#if visible}
+<div class="fixed bottom-28 right-8 z-50 w-80 bg-zinc-900/90 backdrop-blur-md border border-zinc-700 rounded-lg shadow-2xl p-4 animate-in slide-in-from-right-10 fade-in duration-300">
+    <div class="flex items-center justify-between mb-2">
+        <h3 class="text-white font-bold text-sm">Downloads</h3>
+        <span class="text-xs text-zinc-400">{statusText}</span>
+    </div>
+    
+    <div class="text-xs text-zinc-300 truncate mb-1" title={currentFile}>
+        {currentFile || "Waiting..."}
+    </div>
+
+    <!-- Progress Bar -->
+    <div class="w-full bg-zinc-800 rounded-full h-2 mb-2 overflow-hidden">
+        <div class="bg-gradient-to-r from-green-500 to-emerald-400 h-2 rounded-full transition-all duration-200" style="width: {progress}%"></div>
+    </div>
+
+    <div class="flex justify-between text-[10px] text-zinc-500 font-mono">
+        <span>{formatBytes(downloadedBytes)} / {formatBytes(totalBytes)}</span>
+        <span>{Math.round(progress)}%</span>
+    </div>
+</div>
+{/if}
-- 
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