Added for files

6580e51c · shivupoojar · d121382b · 6580e51c · 6580e51c · 6580e51c
Commit 6580e51c authored 1 year ago by shivupoojar
--- a/app.py
+++ b/app.py
+import json
+from datetime import datetime
+
+from flask import Flask, render_template, request
+
+app = Flask(__name__)
+
+
+def read_messages_from_file():
+    """ Read all messages from a JSON file"""
+    with open('data.json') as messages_file:
+        return json.load(messages_file)
+
+
+def append_message_to_file(content):
+    """ Read the contents of JSON file, add this message to it's contents, then write it back to disk. """
+    data = read_messages_from_file()
+    new_message = {
+        'content': content,
+        'timestamp': datetime.now().isoformat(" ", "seconds")
+    }
+    data['messages'].append(new_message)
+    with open('data.json', mode='w') as messages_file:
+        json.dump(data, messages_file)
+
+
+# The Flask route, defining the main behaviour of the webserver:
+@app.route("/")
+def home():
+    new_message = request.args.get('msg')
+    if new_message:
+        append_message_to_file(new_message)
+
+    data = read_messages_from_file()
+
+    # Return a Jinja HTML template, passing the messages as an argument to the template:
+    return render_template('home.html', messages=data['messages'])
--- a/data.json
+++ b/data.json
+{"messages": []}
\ No newline at end of file
--- a/requirements.txt
+++ b/requirements.txt
+# this file defines the pip packages neede by this application
+flask==2.0.2
\ No newline at end of file
--- a/templates/home.html
+++ b/templates/home.html
+<!doctype html>
+<!-- This is a Jinja based template. To read more about Jinja, check
+ https://jinja.palletsprojects.com/en/3.0.x/  -->
+<title>Message board</title>
+<body>
+    <h4>There are {{ messages|length }} messages on the board.</h4>
+
+    <h4> Here are the last 10:</h4>
+    <ul>
+        {% for m in messages[-9:]|reverse %}
+            <li>
+                "{{m.content}}" <small>Posted on {{m.timestamp}}</small>
+            </li>
+        {% endfor %}
+    </ul>
+    <h4> Enter a new message</h4>
+    <form action="/">
+        <label >Your message:</label><br>
+        <input type="text" name="msg"><br>
+        <input type="submit" value="Submit">
+    </form>
+</body>