feat([2fd88f42]): initial setup of heatmap tool

heatmap-tool/frontend/src/App.css

@@ -0,0 +1,86 @@
+/* General App Styling */
+:root {
+  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+  color-scheme: light dark;
+  color: rgba(255, 255, 255, 0.87);
+  background-color: #242424;
+}
+
+body {
+  margin: 0;
+  display: flex;
+  place-items: center;
+  min-width: 320px;
+  min-height: 100vh;
+}
+
+#root {
+  width: 100%;
+  height: 100vh;
+  margin: 0;
+  padding: 0;
+  text-align: center;
+}
+
+
+/* Layout Styling */
+.App {
+  display: flex;
+  flex-direction: column;
+  height: 100vh;
+  text-align: left;
+}
+
+.App-header {
+  background-color: #282c34;
+  padding: 10px 20px;
+  color: white;
+  flex-shrink: 0;
+}
+
+.App-header h1 {
+  font-size: 1.5em;
+  margin: 0;
+}
+
+.App-main {
+  display: flex;
+  flex-grow: 1;
+  overflow: hidden; /* Prevent scrolling at the main level */
+}
+
+.control-panel {
+  width: 350px;
+  padding: 20px;
+  background-color: #333;
+  overflow-y: auto; /* Allow scrolling if filters are many */
+  flex-shrink: 0;
+  box-shadow: 2px 0 5px rgba(0,0,0,0.5);
+  z-index: 10;
+}
+
+.map-container {
+  flex-grow: 1;
+  background-color: #1e1e1e;
+  position: relative; /* Needed for loading/error overlays */
+}
+
+.map-container .error {
+  color: #ff6b6b;
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  background-color: rgba(0, 0, 0, 0.7);
+  padding: 20px;
+  border-radius: 8px;
+}
+
+.map-container p {
+    position: absolute;
+    top: 50%;
+    left: 50%;
+    transform: translate(-50%, -50%);
+}

heatmap-tool/frontend/src/App.tsx

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+import { useState } from 'react';
+import axios from 'axios';
+import './App.css';
+import FileUpload from './components/FileUpload';
+import FilterPanel from './components/FilterPanel';
+import MapDisplay from './components/MapDisplay';
+
+// Define types for our state
+export interface FilterOptions {
+  [key: string]: string[];
+}
+
+export interface HeatmapPoint {
+  plz: string;
+  lat: number;
+  lon: number;
+  count: number;
+}
+
+function App() {
+  const [filters, setFilters] = useState<FilterOptions>({});
+  const [heatmapData, setHeatmapData] = useState<HeatmapPoint[]>([]);
+  const [isLoading, setIsLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const handleUploadSuccess = (newFilters: FilterOptions) => {
+    setFilters(newFilters);
+    setHeatmapData([]); // Clear previous heatmap data
+    setError(null);
+    // Automatically fetch data with no filters on successful upload
+    handleFilterChange({});
+  };
+
+  const handleFilterChange = async (selectedFilters: FilterOptions) => {
+    setIsLoading(true);
+    setError(null);
+    try {
+      const response = await axios.post('http://localhost:8000/api/heatmap', {
+        filters: selectedFilters,
+      });
+      setHeatmapData(response.data);
+    } catch (error: any) {
+      if (axios.isAxiosError(error) && error.response) {
+        setError(`Failed to fetch heatmap data: ${error.response.data.detail || error.message}`);
+      } else {
+        setError(`Failed to fetch heatmap data: ${error.message}`);
+      }
+      setHeatmapData([]); // Clear data on error
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  return (
+    <div className="App">
+      <header className="App-header">
+        <h1>German PLZ Heatmap Tool</h1>
+      </header>
+      <main className="App-main">
+        <div className="control-panel">
+          <FileUpload
+            onUploadSuccess={handleUploadSuccess}
+            setIsLoading={setIsLoading}
+            setError={setError}
+          />
+          <FilterPanel
+            filters={filters}
+            onFilterChange={handleFilterChange}
+            isLoading={isLoading}
+          />
+        </div>
+        <div className="map-container">
+          {isLoading && <p>Loading map data...</p>}
+          {error && <p className="error">{error}</p>}
+          <MapDisplay heatmapData={heatmapData} />
+        </div>
+      </main>
+    </div>
+  );
+}
+
+export default App;

heatmap-tool/frontend/src/assets/react.svg

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heatmap-tool/frontend/src/components/FileUpload.tsx

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+// src/components/FileUpload.tsx
+import React, { useState } from 'react';
+import axios from 'axios';
+
+interface FilterOptions {
+  [key: string]: string[];
+}
+
+interface FileUploadProps {
+  onUploadSuccess: (filters: FilterOptions) => void;
+  setIsLoading: (isLoading: boolean) => void;
+  setError: (error: string | null) => void;
+}
+
+const FileUpload: React.FC<FileUploadProps> = ({ onUploadSuccess, setIsLoading, setError }) => {
+  const [selectedFile, setSelectedFile] = useState<File | null>(null);
+
+  const handleFileChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+    if (event.target.files) {
+      setSelectedFile(event.target.files[0]);
+    }
+  };
+
+  const handleSubmit = async (event: React.FormEvent<HTMLFormElement>) => {
+    event.preventDefault();
+    if (!selectedFile) {
+      setError("Please select a file first.");
+      return;
+    }
+    if (!selectedFile.name.endsWith('.xlsx')) {
+        setError("Invalid file type. Please upload an .xlsx file.");
+        return;
+    }
+
+    const formData = new FormData();
+    formData.append('file', selectedFile);
+
+    setIsLoading(true);
+    setError(null);
+
+    try {
+      const response = await axios.post('http://localhost:8000/api/upload', formData, {
+        headers: {
+          'Content-Type': 'multipart/form-data',
+        },
+      });
+      onUploadSuccess(response.data.filters);
+    } catch (error: any) {
+        if (axios.isAxiosError(error) && error.response) {
+            setError(`Upload failed: ${error.response.data.detail || error.message}`);
+        } else {
+            setError(`Upload failed: ${error.message}`);
+        }
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  return (
+    <div className="file-upload">
+      <h3>Upload XLSX File</h3>
+      <form onSubmit={handleSubmit}>
+        <input type="file" accept=".xlsx" onChange={handleFileChange} />
+        <button type="submit" disabled={!selectedFile}>Upload</button>
+      </form>
+    </div>
+  );
+};
+
+export default FileUpload;

heatmap-tool/frontend/src/components/FilterPanel.tsx

@@ -0,0 +1,75 @@
+// src/components/FilterPanel.tsx
+import React, { useState, useEffect } from 'react';
+
+interface FilterOptions {
+  [key: string]: string[];
+}
+
+interface FilterPanelProps {
+  filters: FilterOptions;
+  onFilterChange: (selectedFilters: FilterOptions) => void;
+  isLoading: boolean;
+}
+
+const FilterPanel: React.FC<FilterPanelProps> = ({ filters, onFilterChange, isLoading }) => {
+  const [selectedFilters, setSelectedFilters] = useState<FilterOptions>({});
+
+  // Reset selected filters when a new file is uploaded (filters prop changes)
+  useEffect(() => {
+    setSelectedFilters({});
+  }, [filters]);
+
+  const handleSelectionChange = (category: string, values: string[]) => {
+    setSelectedFilters(prev => ({
+      ...prev,
+      [category]: values,
+    }));
+  };
+  
+  const handleApplyClick = () => {
+      onFilterChange(selectedFilters);
+  }
+
+  const handleResetClick = () => {
+    setSelectedFilters({});
+    onFilterChange({});
+  }
+
+  if (Object.keys(filters).length === 0) {
+    return <div>Upload a file to see filter options.</div>;
+  }
+
+  return (
+    <div className="filter-panel">
+      <h3>Filters</h3>
+      {Object.entries(filters).map(([category, options]) => (
+        <div key={category} className="filter-group">
+          <label>{category}</label>
+          <select
+            multiple
+            value={selectedFilters[category] || []}
+            onChange={(e) =>
+              handleSelectionChange(category, Array.from(e.target.selectedOptions, option => option.value))
+            }
+          >
+            {options.map(option => (
+              <option key={option} value={option}>
+                {option}
+              </option>
+            ))}
+          </select>
+        </div>
+      ))}
+      <div className="filter-buttons">
+        <button onClick={handleApplyClick} disabled={isLoading}>
+          {isLoading ? 'Loading...' : 'Apply Filters'}
+        </button>
+        <button onClick={handleResetClick} disabled={isLoading}>
+            Reset Filters
+        </button>
+      </div>
+    </div>
+  );
+};
+
+export default FilterPanel;

heatmap-tool/frontend/src/components/MapDisplay.tsx

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+// src/components/MapDisplay.tsx
+import React from 'react';
+import { MapContainer, TileLayer, CircleMarker, Tooltip } from 'react-leaflet';
+import 'leaflet/dist/leaflet.css';
+import { HeatmapPoint } from '../App'; // Assuming type is exported from App.tsx
+
+interface MapDisplayProps {
+  heatmapData: HeatmapPoint[];
+}
+
+const MapDisplay: React.FC<MapDisplayProps> = ({ heatmapData }) => {
+  const germanyCenter: [number, number] = [51.1657, 10.4515];
+
+  // Simple scaling function for marker radius
+  const calculateRadius = (count: number) => {
+    return 5 + Math.log(count + 1) * 5;
+  };
+  
+  // Simple color scaling function
+  const getColor = (count: number, maxCount: number) => {
+    const ratio = count / maxCount;
+    if (ratio > 0.8) return 'red';
+    if (ratio > 0.5) return 'orange';
+    if (ratio > 0.2) return 'yellow';
+    return 'green';
+  }
+
+  const maxCount = Math.max(...heatmapData.map(p => p.count), 1);
+
+
+  if (heatmapData.length === 0) {
+      return (
+          <div style={{ textAlign: 'center', paddingTop: '50px' }}>
+              <p>No data to display on the map.</p>
+              <p>Upload a file and apply filters to see the heatmap.</p>
+          </div>
+      );
+  }
+
+  return (
+    <MapContainer center={germanyCenter} zoom={6} style={{ height: '100%', width: '100%' }}>
+      <TileLayer
+        url="https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png"
+        attribution='&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
+      />
+      {heatmapData.map((point, idx) => (
+        <CircleMarker
+          key={idx}
+          center={[point.lat, point.lon]}
+          radius={calculateRadius(point.count)}
+          pathOptions={{ 
+              color: getColor(point.count, maxCount),
+              fillColor: getColor(point.count, maxCount),
+              fillOpacity: 0.7
+          }}
+        >
+          <Tooltip>
+            PLZ: {point.plz} <br />
+            Count: {point.count}
+          </Tooltip>
+        </CircleMarker>
+      ))}
+    </MapContainer>
+  );
+};
+
+export default MapDisplay;

heatmap-tool/frontend/src/index.css

@@ -0,0 +1,68 @@
+:root {
+  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+
+  color-scheme: light dark;
+  color: rgba(255, 255, 255, 0.87);
+  background-color: #242424;
+
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+a {
+  font-weight: 500;
+  color: #646cff;
+  text-decoration: inherit;
+}
+a:hover {
+  color: #535bf2;
+}
+
+body {
+  margin: 0;
+  display: flex;
+  place-items: center;
+  min-width: 320px;
+  min-height: 100vh;
+}
+
+h1 {
+  font-size: 3.2em;
+  line-height: 1.1;
+}
+
+button {
+  border-radius: 8px;
+  border: 1px solid transparent;
+  padding: 0.6em 1.2em;
+  font-size: 1em;
+  font-weight: 500;
+  font-family: inherit;
+  background-color: #1a1a1a;
+  cursor: pointer;
+  transition: border-color 0.25s;
+}
+button:hover {
+  border-color: #646cff;
+}
+button:focus,
+button:focus-visible {
+  outline: 4px auto -webkit-focus-ring-color;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #213547;
+    background-color: #ffffff;
+  }
+  a:hover {
+    color: #747bff;
+  }
+  button {
+    background-color: #f9f9f9;
+  }
+}

heatmap-tool/frontend/src/main.tsx

@@ -0,0 +1,10 @@
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import './index.css'
+import App from './App.tsx'
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+)