From 0866ce20023e68a00d45f4786686711e95bc8491 Mon Sep 17 00:00:00 2001
From: Ashley Razo <ashley.razo@furman.edu>
Date: Mon, 12 May 2025 11:26:23 +0200
Subject: [PATCH] Add chart1 and chart2 visualizations for UK data

---
 flaskapp/routes.py             |  61 +++++++++++++++++++++++++++++++++
 flaskapp/templates/chart1.html |   2 ++
 flaskapp/templates/chart2.html |   2 ++
 instance/site.db               | Bin 2744320 -> 2744320 bytes
 4 files changed, 65 insertions(+)
 create mode 100644 flaskapp/templates/chart1.html
 create mode 100644 flaskapp/templates/chart2.html

diff --git a/flaskapp/routes.py b/flaskapp/routes.py
index ac7f7f5f0..c7555dda2 100644
--- a/flaskapp/routes.py
+++ b/flaskapp/routes.py
@@ -1,8 +1,15 @@
 from flask import render_template, flash, redirect, url_for, request
 from flaskapp import app, db
 from flaskapp.models import BlogPost, IpView, Day
+from flaskapp.models import UkData
 from flaskapp.forms import PostForm
 import datetime
+import matplotlib
+matplotlib.use('Agg') #Use non-GUI backend 
+import matplotlib.pyplot as plt 
+import io 
+import base64
+
 
 import pandas as pd
 import json
@@ -71,3 +78,57 @@ def before_request_func():
         db.session.add(ip_view)  # insert into the ip_view table
 
     db.session.commit()  # commit all the changes to the database
+
+@app.route('/chart1')
+def chart1():
+    data = UkData.query.all()
+    df = pd.DataFrame([d.__dict__ for d in data])
+
+    df['region'] = df['region'].str.strip()
+    df = df[~df['region'].isin(['Wales', 'Scotland'])]
+
+    if df.empty:
+        return "No English regions found in the data."
+    
+    #Example chart: Voter turnout per region
+    turnout_by_region = df.groupby('region')['Turnout19'].mean()
+
+    fig, ax = plt.subplots()
+    turnout_by_region.plot(kind = 'bar', ax = ax)
+    ax.set_title("Average 2019 Turnout in English Regions")
+    ax.set_ylabel("Turnout (%)")
+
+    fig.tight_layout() #fix axis cropping
+
+    img = io.BytesIO()
+    fig.savefig(img, format = 'png')
+    img.seek(0)
+    plot_url = base64.b64encode(img.getvalue()).decode()
+
+    return render_template('chart1.html', plot_url = plot_url)
+
+@app.route('/chart2')
+@app.route('/chart2/<country>')
+def chart2(country = None):
+    data = UkData.query.all()
+    df = pd.DataFrame([d.__dict__ for d in data])
+
+    if country:
+        df = df[df['region'].str.lower() == country.lower()]
+
+    party_votes = df[['ConVote19', 'LabVote19', 'LDVote19']].mean()
+    party_votes.index = ['Conservative', 'Labour', 'Liberal Democrats']
+
+    fig, ax = plt.subplots()
+    party_votes.plot(kind='pie', ax = ax, autopct = '%1.1f%%')
+    ax.set_title(f"Average Vote Share{' in ' + country.title() if country else ''}")
+    ax.set_ylabel('')
+
+    fig.tight_layout() #fix axis cropping
+
+    img = io.BytesIO()
+    fig.savefig(img, format = 'png')
+    img.seek(0)
+    plot_url = base64.b64encode(img.getvalue()).decode()
+
+    return render_template('chart2.html', plot_url = plot_url)
diff --git a/flaskapp/templates/chart1.html b/flaskapp/templates/chart1.html
new file mode 100644
index 000000000..f4fba533d
--- /dev/null
+++ b/flaskapp/templates/chart1.html
@@ -0,0 +1,2 @@
+<h2>Chart 1: Average Turnout by Region</h2>
+<img src="data:image/png;base64,{{ plot_url }}" />
diff --git a/flaskapp/templates/chart2.html b/flaskapp/templates/chart2.html
new file mode 100644
index 000000000..2860854dc
--- /dev/null
+++ b/flaskapp/templates/chart2.html
@@ -0,0 +1,2 @@
+<h2>Chart 2: Average Vote Share by Party</h2>
+<img src="data:image/png;base64,{{ plot_url }}" />
diff --git a/instance/site.db b/instance/site.db
index 1f77ee42905fe947355f2d25a5da042a0e37e5d9..175b2048350049ca13bdc119318b77ae59259948 100644
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