Add historical comparison charts to stats page

portal/common.py

@@ -8,6 +8,7 @@
     CACHE_KEY_DONATION_TOWARDS_GOAL_PERCENT,
     CACHE_KEY_DONATIONS_TOTAL_AMOUNT,
     CACHE_KEY_DONORS_COUNT,
+    CACHE_KEY_HISTORICAL_COMPARISON,
     CACHE_KEY_SPONSORSHIP_BREAKDOWN,
     CACHE_KEY_SPONSORSHIP_COMMITTED,
     CACHE_KEY_SPONSORSHIP_COMMITTED_COUNT,
@@ -27,6 +28,8 @@
     CACHE_KEY_VOLUNTEER_SIGNUPS_COUNT,
     DONATION_GOAL_AMOUNT,
     DONATIONS_GOAL,
+    HISTORICAL_STATS,
+    PROPOSALS_2025_COUNT,
     SPONSORSHIP_GOAL,
     SPONSORSHIP_GOAL_AMOUNT,
     STATS_CACHE_TIMEOUT,
@@ -49,6 +52,7 @@ def get_stats_cached_values():
     stats_dict.update(get_sponsorships_stats_dict())
     stats_dict.update(get_donations_stats_dict())
     stats_dict.update(get_attendee_stats_dict())
+    stats_dict[CACHE_KEY_HISTORICAL_COMPARISON] = get_historical_comparison_data()
     return stats_dict
 
 
@@ -610,3 +614,142 @@ def get_attendee_stats_dict():
     stats_dict = {}
     stats_dict[CACHE_KEY_ATTENDEE_COUNT] = get_attendee_count_cache()
     return stats_dict
+
+
+def get_historical_comparison_data():
+    """
+    Returns historical comparison data for charts showing progress over the years.
+    Combines hardcoded historical data with current year's data.
+    """
+    historical_comparison = cache.get(CACHE_KEY_HISTORICAL_COMPARISON)
+    if not historical_comparison:
+        # Get current year data
+        current_registrations = get_attendee_count_cache()
+        current_sponsors = get_sponsorship_total_count_stats_cache()
+        current_sponsorship_amount = get_sponsorship_committed_amount_stats_cache()
+        current_donors = get_donors_count_cache()
+        current_donation_amount = get_total_donations_amount_cache()
+
+        # Build comparison data structure
+        historical_comparison = []
+
+        # Registrations comparison
+        historical_comparison.append(
+            {
+                "title": "Registrations Over the Years",
+                "columns": [["string", "Year"], ["number", "Registrations"]],
+                "data": [
+                    ["2023", HISTORICAL_STATS["2023"]["registrations"]],
+                    ["2024", HISTORICAL_STATS["2024"]["registrations"]],
+                    ["2025", current_registrations],
+                ],
+                "chart_id": "registrations_comparison",
+                "chart_type": "bar",
+            }
+        )
+
+        # Proposals comparison
+        historical_comparison.append(
+            {
+                "title": "Proposals Over the Years",
+                "columns": [["string", "Year"], ["number", "Proposals"]],
+                "data": [
+                    ["2023", HISTORICAL_STATS["2023"]["proposals"]],
+                    ["2024", HISTORICAL_STATS["2024"]["proposals"]],
+                    ["2025", PROPOSALS_2025_COUNT],
+                ],
+                "chart_id": "proposals_comparison",
+                "chart_type": "bar",
+            }
+        )
+
+        # Sponsors comparison
+        historical_comparison.append(
+            {
+                "title": "Number of Sponsors Over the Years",
+                "columns": [["string", "Year"], ["number", "Sponsors"]],
+                "data": [
+                    ["2023", HISTORICAL_STATS["2023"]["sponsors"]],
+                    ["2024", HISTORICAL_STATS["2024"]["sponsors"]],
+                    ["2025", current_sponsors],
+                ],
+                "chart_id": "sponsors_comparison",
+                "chart_type": "bar",
+            }
+        )
+
+        # Sponsorship amount comparison
+        historical_comparison.append(
+            {
+                "title": "Sponsorship Amount Over the Years",
+                "columns": [["string", "Year"], ["number", "Amount (USD)"]],
+                "data": [
+                    ["2023", HISTORICAL_STATS["2023"]["sponsorship_amount"]],
+                    ["2024", HISTORICAL_STATS["2024"]["sponsorship_amount"]],
+                    ["2025", current_sponsorship_amount],
+                ],
+                "chart_id": "sponsorship_amount_comparison",
+                "chart_type": "bar",
+            }
+        )
+
+        # Individual donations comparison
+        historical_comparison.append(
+            {
+                "title": "Number of Individual Donors Over the Years",
+                "columns": [["string", "Year"], ["number", "Donors"]],
+                "data": [
+                    ["2023", HISTORICAL_STATS["2023"]["donors"]],
+                    ["2024", HISTORICAL_STATS["2024"]["donors"]],
+                    ["2025", current_donors],
+                ],
+                "chart_id": "donors_comparison",
+                "chart_type": "bar",
+            }
+        )
+
+        # Donation amount comparison
+        historical_comparison.append(
+            {
+                "title": "Donation Amount Over the Years",
+                "columns": [["string", "Year"], ["number", "Amount (USD)"]],
+                "data": [
+                    ["2023", HISTORICAL_STATS["2023"]["donation_amount"]],
+                    ["2024", HISTORICAL_STATS["2024"]["donation_amount"]],
+                    ["2025", current_donation_amount],
+                ],
+                "chart_id": "donation_amount_comparison",
+                "chart_type": "bar",
+            }
+        )
+
+        # Total proceeds comparison
+        historical_comparison.append(
+            {
+                "title": "Total Proceeds Over the Years",
+                "columns": [["string", "Year"], ["number", "Amount (USD)"]],
+                "data": [
+                    [
+                        "2023",
+                        HISTORICAL_STATS["2023"]["sponsorship_amount"]
+                        + HISTORICAL_STATS["2023"]["donation_amount"],
+                    ],
+                    [
+                        "2024",
+                        HISTORICAL_STATS["2024"]["sponsorship_amount"]
+                        + HISTORICAL_STATS["2024"]["donation_amount"],
+                    ],
+                    ["2025", current_sponsorship_amount + current_donation_amount],
+                ],
+                "chart_id": "proceeds_comparison",
+                "chart_type": "bar",
+            }
+        )
+
+        cache.set(
+            CACHE_KEY_HISTORICAL_COMPARISON,
+            historical_comparison,
+            STATS_CACHE_TIMEOUT,
+        )
+
+    return historical_comparison

portal/constants.py

@@ -34,4 +34,31 @@
 
 CACHE_KEY_ATTENDEE_COUNT = "attendee_count"
 
+# Historical data for comparison charts
+CACHE_KEY_HISTORICAL_COMPARISON = "historical_comparison"
+
+# Historical data from past PyLadiesCon events
+# Data source: https://conference.pyladies.com/2024-pyladiescon-ends/
+HISTORICAL_STATS = {
+    "2023": {
+        "registrations": 600,
+        "proposals": 164,
+        "sponsors": 8,
+        "sponsorship_amount": 10500,
+        "donors": 58,
+        "donation_amount": 650,
+    },
+    "2024": {
+        "registrations": 732,
+        "proposals": 192,
+        "sponsors": 11,
+        "sponsorship_amount": 10000,
+        "donors": 105,
+        "donation_amount": 1520,
+    },
+}
+
+# Current year proposals count (not stored in database)
+PROPOSALS_2025_COUNT = 194
+
 BASE_PRETIX_URL = "https://pretix.eu/api/v1/"

templates/portal/historical_comparison_charts.html

@@ -0,0 +1,40 @@
+{% comment %}
+Historical comparison charts for PyLadiesCon stats across years
+Uses Google Charts to display bar charts comparing metrics from 2023, 2024, and 2025
+{% endcomment %}
+{% for comparison in stats.historical_comparison %}
+    var data_{{ comparison.chart_id }} = new google.visualization.DataTable();
+    {% for column in comparison.columns %}
+        data_{{ comparison.chart_id }}.addColumn('{{ column.0 }}', '{{ column.1 }}');
+    {% endfor %}
+    data_{{ comparison.chart_id }}.addRows([
+    {% for row in comparison.data %}
+        ['{{ row.0 }}', {{ row.1 }}]
+        {% if not forloop.last %}
+            ,
+        {% endif %}
+    {% endfor %}
+    ]);
+    var options_{{ comparison.chart_id }} = {
+    title: '{{ comparison.title }}',
+    chartArea: { width: '70%' },
+    hAxis: {
+    title: 'Year',
+    minValue: 0
+    },
+    vAxis: {
+    title: '{{ comparison.columns.1.1 }}'
+    },
+    colors: ['#7C5BC8'],
+    legend: { position: 'none' },
+    animation: {
+    startup: true,
+    duration: 1000,
+    easing: 'out'
+    }
+    };
+    var chart_{{ comparison.chart_id }} = new google.visualization.ColumnChart(
+    document.getElementById('{{ comparison.chart_id }}')
+    );
+    chart_{{ comparison.chart_id }}.draw(data_{{ comparison.chart_id }}, options_{{ comparison.chart_id }});
+{% endfor %}

templates/portal/stats.html

@@ -11,8 +11,14 @@
     function drawChart() {
         {% include "sponsorship/sponsorship_charts.html" %}
         {% include "volunteer/volunteer_charts.html" %}
+        {% include "portal/historical_comparison_charts.html" %}
     }
     </script>
+    <style>
+        .chart-container {
+            height: 300px;
+        }
+    </style>
 {% endblock extra_head %}
 {% block body %}
 {% endblock body %}
@@ -53,5 +59,25 @@ <h3 class="mb-2">
             </div>
         </div>
         {% include "volunteer/volunteer_stats.html" %}
+        <!-- Historical Comparison Section -->
+        <div class="row mt-5">
+            <div class="col-12">
+                <h3 class="pb-2 border-bottom">
+                    <i class="bi bi-graph-up"></i> Historical Comparison
+                </h3>
+            </div>
+        </div>
+        <div class="row g-4 mt-2">
+            {% for comparison in stats.historical_comparison %}
+                <div class="col-md-6">
+                    <div class="card h-100">
+                        <div class="card-body">
+                            <div id="{{ comparison.chart_id }}" class="chart-container">
+                            </div>
+                        </div>
+                    </div>
+                </div>
+            {% endfor %}
+        </div>
     </div>
 {% endblock content %}