Enhance file upload experience with drag-and-drop support and file removal functionality

app/src/index.css

@@ -29,7 +29,7 @@ body {
   display: flex;
   place-items: center;
   min-width: 320px;
-  min-height: 100vh;
+  height: 98vh;
 }
 
 h1 {

app/src/pages/Home.tsx

@@ -1,39 +1,141 @@
-import { useState } from 'react'
-import { useNavigate } from 'react-router-dom'
-import { readFiles } from '../model/parser'
-import { addStreams } from '../util/db'
+import { useState, useRef } from "react";
+import { useNavigate } from "react-router-dom";
+import { readFiles } from "../model/parser";
+import { addStreams } from "../util/db";
 
 const Home = () => {
-    const [files, setFiles] = useState<File[]>([])
-    const navigate = useNavigate()
+	const [files, setFiles] = useState<File[]>([]);
+	const [dragOver, setDragOver] = useState(false);
+	const navigate = useNavigate();
+	const fileInputRef = useRef<HTMLInputElement>(null);
 
-    const handleUpload = async () => {
-        if (files.length === 0) return;
+	const handleFiles = (fileList: FileList | null) => {
+		if (fileList) {
+			const jsonFiles = Array.from(fileList).filter((file) => file.type === "application/json" || file.name.endsWith(".json"));
+			setFiles(jsonFiles);
+		}
+	};
 
-        const streams = await readFiles(files); // your parser
-        await addStreams(streams);              // save to IndexedDB
-        navigate('/stats');                     // go to StatView
-      };
+	//#region File handling methods
+	const handleFileSelect = (e: React.ChangeEvent<HTMLInputElement>) => {
+		handleFiles(e.target.files);
+	};
 
-    return (
-        <div>
-            <h1>Upload Spotify files</h1>
-            <input 
-                type="file" 
-                accept=".json" 
-                multiple 
-                onChange={(e) => {
-                    if (e.target.files) {
-                        setFiles(Array.from(e.target.files));
-                    }
-                }}
-            />
-            <button
-                onClick={handleUpload}> 
-                Upload
-            </button>
-        </div>
-    )
-}
+	const handleDrop = (e: React.DragEvent) => {
+		e.preventDefault();
+		setDragOver(false);
+		handleFiles(e.dataTransfer.files);
+	};
+
+	const handleDragOver = (e: React.DragEvent) => {
+		e.preventDefault();
+		setDragOver(true);
+	};
+
+	const handleDragLeave = (e: React.DragEvent) => {
+		e.preventDefault();
+		setDragOver(false);
+	};
+	//#endregion
+
+	const handleUpload = async () => {
+		if (files.length === 0) return;
+
+		const streams = await readFiles(files);
+		await addStreams(streams);
+		navigate("/stats");
+	};
+
+	const openFileDialog = () => {
+		fileInputRef.current?.click();
+	};
+
+	const removeFile = (index: number) => {
+		setFiles(files.filter((_, i) => i !== index));
+	};
+
+	return (
+		<div>
+			<h1>Upload Spotify files</h1>
+
+			{/* Hidden actual input */}
+			<input ref={fileInputRef} type="file" accept=".json" multiple onChange={handleFileSelect} style={{ display: "none" }} />
+
+			{/* Custom drop zone */}
+			<div
+				onClick={openFileDialog}
+				onDrop={handleDrop}
+				onDragOver={handleDragOver}
+				onDragLeave={handleDragLeave}
+				style={{
+					border: `2px dashed ${dragOver ? "#007bff" : "#ccc"}`,
+					borderRadius: "8px",
+					padding: "40px 20px",
+					textAlign: "center",
+					cursor: "pointer",
+					backgroundColor: dragOver ? "#f8f9fa1c" : "",
+					transition: "all 0.3s ease",
+					margin: "20px 0",
+				}}
+			>
+				<div style={{ fontSize: "48px", marginBottom: "10px" }}>📁</div>
+				<p style={{ margin: "10px 0", fontSize: "16px", fontWeight: "bold" }}>Drop JSON files here or click to browse</p>
+				<p style={{ margin: "5px 0", fontSize: "14px", color: "#666" }}>Multiple .json files accepted</p>
+			</div>
+
+			{files.length > 0 && (
+				<div style={{ margin: "20px 0" }}>
+					<h3>{files.length} files selected:</h3>
+					{files.map((file, index) => (
+						<div
+							key={index}
+							style={{
+								display: "flex",
+								justifyContent: "space-between",
+								alignItems: "center",
+								padding: "8px 12px",
+								margin: "5px 0",
+								borderRadius: "4px",
+							}}
+						>
+							<span>{file.name}</span>
+							<button
+								onClick={(e) => {
+									e.stopPropagation();
+									removeFile(index);
+								}}
+								style={{
+									background: "#ff4444",
+									color: "white",
+									border: "none",
+									borderRadius: "3px",
+									padding: "4px 8px",
+									cursor: "pointer",
+								}}
+							>
+								✕
+							</button>
+						</div>
+					))}
+					<button
+						onClick={handleUpload}
+						style={{
+							backgroundColor: "#007bff",
+							color: "white",
+							border: "none",
+							padding: "12px 24px",
+							borderRadius: "6px",
+							cursor: "pointer",
+							fontSize: "16px",
+							marginTop: "10px",
+						}}
+					>
+						Upload Files
+					</button>
+				</div>
+			)}
+		</div>
+	);
+};
 
 export default Home;