Unpacking modules

app/ajax.py

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+'''
+AJAX hooks for the website.
+
+Warning: this is not the public API.
+'''
+
+from flask import Blueprint, jsonify
+from .models import User
+from .utils import locations, get_current_user, is_username
+
+bp = Blueprint('ajax', __name__, url_prefix='/ajax')
+
+@bp.route('/username_availability/<username>')
+def username_availability(username):
+    current = get_current_user()
+    if current:
+        current = current.username
+    else:
+        current = None
+    is_valid = is_username(username)
+    if is_valid:
+        try:
+            user = User.get(User.username == username)
+            is_available = current == user.username
+        except User.DoesNotExist:
+            is_available = True
+    else:
+        is_available = False
+    return jsonify({'is_valid':is_valid, 'is_available':is_available, 'status':'ok'})
+
+@bp.route('/location_search/<name>')
+def location_search(name):
+    results = []
+    for key, value in locations.items():
+        if value.lower().startswith(name.lower()):
+            results.append({'value': key, 'display': value})
+    return jsonify({'results': results})