Initial import: Carteasy Shop (Dev-Stand)
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Thomas Bartelt
Executable
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#!/usr/bin/env python3
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"""
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Chart Generation Service with Plotly
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Generates modern, interactive charts from statistical data
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"""
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import json
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import sys
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import plotly.graph_objects as go
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from plotly.subplots import make_subplots
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import plotly.colors as pc
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def generate_chart(data, chart_config):
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"""
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Generate Plotly chart from statistical data
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Args:
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data: List of lists - first row is headers, rest is data
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chart_config: Dict with chart configuration (title, type, etc.)
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Returns:
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HTML string with embedded Plotly chart
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"""
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if not data or len(data) < 2:
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return "<div>Keine Daten verfügbar</div>"
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headers = data[0]
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rows = data[1:]
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# Extract x-axis labels (first column)
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x_labels = [str(row[0]) for row in rows]
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# Prepare traces for each data series
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fig = go.Figure()
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# Color palette - modern and professional
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colors = pc.qualitative.Plotly
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# Create a trace for each column (except first which is x-axis)
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for i in range(1, len(headers)):
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y_values = [row[i] if i < len(row) else 0 for row in rows]
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fig.add_trace(go.Bar(
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name=headers[i],
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x=x_labels,
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y=y_values,
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marker_color=colors[i % len(colors)],
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hovertemplate='<b>%{x}</b><br>%{fullData.name}: %{y}<extra></extra>'
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))
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# Update layout with modern styling
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fig.update_layout(
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title={
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'text': chart_config.get('title', 'Statistik'),
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'x': 0.5,
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'xanchor': 'center',
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'font': {'size': 20, 'color': '#333'}
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},
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barmode='group',
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plot_bgcolor='rgba(240, 240, 240, 0.5)',
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paper_bgcolor='white',
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font={'family': 'Arial, sans-serif', 'size': 12, 'color': '#333'},
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hovermode='x unified',
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legend={
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'orientation': 'h',
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'yanchor': 'bottom',
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'y': -0.2,
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'xanchor': 'center',
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'x': 0.5,
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'bgcolor': 'rgba(255, 255, 255, 0.8)',
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'bordercolor': '#ccc',
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'borderwidth': 1
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},
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xaxis={
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'title': headers[0] if headers else '',
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'showgrid': False,
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'showline': True,
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'linecolor': '#ccc'
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},
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yaxis={
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'title': 'Anzahl',
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'showgrid': True,
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'gridcolor': 'rgba(200, 200, 200, 0.3)',
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'showline': True,
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'linecolor': '#ccc'
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},
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margin={'l': 60, 'r': 40, 't': 80, 'b': 100},
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height=500
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)
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# Generate HTML with Plotly CDN
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html = fig.to_html(
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include_plotlyjs='cdn',
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div_id='plotly-chart',
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config={
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'displayModeBar': True,
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'displaylogo': False,
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'modeBarButtonsToRemove': ['pan2d', 'lasso2d', 'select2d'],
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'responsive': True
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}
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)
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return html
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def generate_line_chart(data, chart_config):
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"""
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Generate Plotly line chart for time series data
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"""
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if not data or len(data) < 2:
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return "<div>Keine Daten verfügbar</div>"
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headers = data[0]
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rows = data[1:]
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x_labels = [str(row[0]) for row in rows]
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fig = go.Figure()
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colors = pc.qualitative.Plotly
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# Create line traces
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for i in range(1, len(headers)):
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y_values = [row[i] if i < len(row) else 0 for row in rows]
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fig.add_trace(go.Scatter(
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name=headers[i],
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x=x_labels,
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y=y_values,
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mode='lines+markers',
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line={'color': colors[i % len(colors)], 'width': 3},
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marker={'size': 8},
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hovertemplate='<b>%{x}</b><br>%{fullData.name}: %{y}<extra></extra>'
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))
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# Update layout - NO fixed y-axis minimum for line charts
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fig.update_layout(
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title={
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'text': chart_config.get('title', 'Statistik Verlauf'),
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'x': 0.5,
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'xanchor': 'center',
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'font': {'size': 20, 'color': '#333'}
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},
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plot_bgcolor='rgba(240, 240, 240, 0.5)',
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paper_bgcolor='white',
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font={'family': 'Arial, sans-serif', 'size': 12, 'color': '#333'},
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hovermode='x unified',
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legend={
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'orientation': 'h',
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'yanchor': 'bottom',
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'y': -0.2,
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'xanchor': 'center',
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'x': 0.5,
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'bgcolor': 'rgba(255, 255, 255, 0.8)',
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'bordercolor': '#ccc',
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'borderwidth': 1
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},
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xaxis={
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'title': headers[0] if headers else '',
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'showgrid': False,
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'showline': True,
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'linecolor': '#ccc'
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},
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yaxis={
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'title': 'Anzahl',
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'showgrid': True,
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'gridcolor': 'rgba(200, 200, 200, 0.3)',
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'showline': True,
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'linecolor': '#ccc',
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'rangemode': 'normal', # Auto-scale, don't force to 0
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'autorange': True
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},
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margin={'l': 60, 'r': 40, 't': 80, 'b': 100},
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height=500
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)
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html = fig.to_html(
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include_plotlyjs='cdn',
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div_id='plotly-line-chart',
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config={
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'displayModeBar': True,
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'displaylogo': False,
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'modeBarButtonsToRemove': ['pan2d', 'lasso2d', 'select2d'],
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'responsive': True
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}
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)
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return html
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def main():
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"""
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Main entry point - expects JSON input via stdin
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Expected format:
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{
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"data": [[headers], [row1], [row2], ...],
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"config": {
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"title": "Chart Title",
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"type": "bar" or "line",
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"period": "year", "month", or "day"
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}
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}
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"""
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try:
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# Read JSON from stdin
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input_data = json.load(sys.stdin)
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data = input_data.get('data', [])
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config = input_data.get('config', {})
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# Generate chart based on type
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chart_type = config.get('type', 'bar')
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if chart_type == 'line':
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html = generate_line_chart(data, config)
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else:
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html = generate_chart(data, config)
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# Output HTML
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print(html)
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except Exception as e:
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error_html = f"""
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<div style="padding: 20px; background: #fee; border: 1px solid #fcc; border-radius: 4px;">
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<h3 style="color: #c33; margin: 0 0 10px 0;">Chart-Generierung fehlgeschlagen</h3>
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<p style="margin: 0; color: #666;">Fehler: {str(e)}</p>
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</div>
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"""
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print(error_html)
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sys.exit(1)
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if __name__ == '__main__':
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main()
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