added tags functionality

app.py

@@ -1,29 +1,46 @@
 from flask import Flask, render_template
 from flask_flatpages import FlatPages
 
-DEBUG = True
-FLATPAGES_AUTO_RELOAD = DEBUG
-FLATPAGES_EXTENSION = '.md'
-
 app = Flask(__name__)
-app.config.from_object(__name__)
+
+# Consolidate Configs
+app.config.update(
+    FLATPAGES_AUTO_RELOAD = True,
+    FLATPAGES_EXTENSION = '.md',
+    FLATPAGES_MARKDOWN_EXTENSIONS = ['fenced_code', 'tables']
+)
+
 pages = FlatPages(app)
-FLATPAGES_MARKDOWN_EXTENSIONS = ['fenced_code', 'tables']
-app.config['FLATPAGES_MARKDOWN_EXTENSIONS'] = FLATPAGES_MARKDOWN_EXTENSIONS
 
 @app.route('/')
 def index():
+    # Sort posts by date metadata
     posts = sorted(pages, key=lambda p: p.meta.get('date'), reverse=True)
     return render_template('index.html', posts=posts)
 
-@app.route('/<path:path>/')
-def post(path):
-    page = pages.get_or_404(path)
-    return render_template('post.html', page=page)
-
 @app.route('/about')
 def about():
     return render_template('about.html')
 
+
+@app.route('/post/<path:path>/') # Adding /post/ prefix helps organize URLs
+def post(path):
+    page = pages.get_or_404(path)
+    return render_template('post.html', page=page)
+
+@app.route('/tag/<string:tag_name>/')
+def tag(tag_name):
+    tagged_pages = [p for p in pages if tag_name in p.meta.get('tags', [])]
+    return render_template('tag.html', pages=tagged_pages, tag_name=tag_name)
+
+@app.context_processor
+def inject_tags():
+    all_tags = set()
+    for page in pages:
+        t = page.meta.get('tags', [])
+        if isinstance(t, list):
+            all_tags.update(t)
+    return dict(all_cloud_tags=sorted(list(all_tags)))
+
 if __name__ == "__main__":
-    app.run(port=5001)
+    app.run(port=5001, debug=True)