Submission PS 2, 1 Elena Dreyer

circle.py

@@ -0,0 +1,9 @@
+from math import pi
+class Circle:
+    def __init__(self, radius):
+        self.radius = radius
+    def area(self):
+        return pow(self.radius,2) * pi
+
+    def perimeter(self):
+        return 2 * pi * self.radius

flask_app.py

@@ -2,6 +2,10 @@
 
 from helper import perform_calculation, convert_to_float
 
+from circle import Circle
+
+from test_circle import test_circle_area, test_circle_perimeter
+
 app = Flask(__name__)  # create the instance of the flask class
 
 
@@ -38,3 +42,34 @@ def calculate():
             return render_template('calculator.html', printed_result="You cannot divide by zero")
 
     return render_template('calculator.html')
+
+@app.route('/circle', methods=['GET', 'POST'])
+def circle():
+    area = None # default
+    perimeter = None # default
+    radius = None  # default
+    printed_result = ""
+    if request.method == 'POST':
+        radius_str = request.form.get('radius')
+        if radius_str:
+            try:
+                radius = float(radius_str)
+                if radius > 0:
+                    circle_obj = Circle(radius)
+                    area = "{:.2f}".format(circle_obj.area())
+                    perimeter = "{:.2f}".format(circle_obj.perimeter())
+                else:
+                    # If radius is not greater than 0, reset it to None and set the error message
+                    radius = None
+                    printed_result = "Radius must be a positive number."
+            except ValueError:
+                # If there's a ValueError, reset radius to None and set the error message
+                radius = None
+                printed_result = "Please enter a valid number for the radius."
+    return render_template('circle.html', radius=radius, area=area, perimeter=perimeter, printed_result=printed_result)
+
+# Optional: Run app in debug Mode including the tests
+# if __name__ == '__main__':
+#     test_circle_area()
+#     test_circle_perimeter()
+#     app.run(debug=True)

static/main.css

@@ -7,10 +7,15 @@ body {
     padding: 0;
 }
 
+/* Centered Text */
+p {
+    text-align: center;
+}
+
 .container {
     max-width: 800px;
     margin: 0 auto;
-    padding: 20px;
+    padding: 10px;
 }
 
 /* Header Styles */

templates/circle.html

@@ -0,0 +1,25 @@
+{% extends 'layout.html' %}
+{% block content %}
+    <h1>Circle Operations</h1>
+    <div class="container">
+        <p>Input radius of circle here to find it's area and perimeter. </p>
+
+        <form action="{{ url_for('circle')}}" method="post">
+            <input type="text" name="radius" placeholder="Enter radius" required="required" />
+
+            <button type="submit">Calculate</button>
+        </form>
+
+       <br>
+
+       {% if radius %}
+            <p>For a radius of {{ radius }} the area and perimeter are the following:</p>
+            <p><strong>Area:</strong> {{ area }}</p>
+            <p><strong>Perimeter:</strong> {{ perimeter }}</p>
+        {% elif printed_result %}
+            <p>{{ printed_result }}</p>
+        {% endif %}
+
+    </div>
+
+{% endblock %}

templates/layout.html

@@ -12,6 +12,7 @@ <h1 class="logo"><a href="{{ url_for('home') }}">Home</a></h1>
         <strong><nav>
           <ul class="menu">
             <li><a href="{{ url_for('calculate') }}">General Calculator</a></li>
+            <li><a href="{{ url_for('circle') }}">Circle Operations</a></li>
           </ul>
         </nav></strong>
       </div>

test_circle.py

@@ -0,0 +1,21 @@
+from circle import Circle
+from math import pi
+
+# Test case for the area method
+def test_circle_area():
+    radius = 3
+    test_circle = Circle(radius)
+    expected_area = pi * radius ** 2
+    assert test_circle.area() == expected_area
+
+# Test case for the perimeter method
+def test_circle_perimeter():
+    radius = 3
+    test_circle = Circle(radius)
+    expected_perimeter = 2 * pi * radius
+    assert test_circle.perimeter() == expected_perimeter
+
+if __name__ == "__main__":
+    test_circle_area()
+    test_circle_perimeter()
+    print("All tests passed!")