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Add historical comparison charts to stats page (#289)
* Add historical comparison charts to stats page (implements #287) * Add 2025 proposals count as constant
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‎portal/common.py‎

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

‎portal/constants.py‎

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

‎templates/portal/historical_comparison_charts.html‎

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

‎templates/portal/stats.html‎

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

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