Scaffold event blueprint

Only has /events/checkin/<id> for now, but that's progress!

goathacks/__init__.py

@@ -35,10 +35,12 @@ def create_app():
     from . import registration
     from . import dashboard
     from . import admin
+    from . import events
 
     app.register_blueprint(registration.bp)
     app.register_blueprint(dashboard.bp)
     app.register_blueprint(admin.bp)
+    app.register_blueprint(events.bp)
 
 
     from goathacks import cli

goathacks/events/__init__.py

@@ -0,0 +1,31 @@
+from flask import Blueprint, current_app, flash, redirect, url_for
+from flask_login import current_user, login_required
+
+from goathacks.models import Event, EventCheckins
+from goathacks import db
+
+bp = Blueprint("events", __name__, url_prefix="/events")
+
+@bp.route("/checkin/<int:id>")
+@login_required
+def workshop_checkin(id):
+    event = Event.query.filter_by(id=id).one()
+    if event is None:
+        flash("That event does not exist!")
+        return redirect(url_for("dashboard.home"))
+
+    checkin = EventCheckins.query.filter_by(event_id=id,
+                                            user_id=current_user.id).one()
+    if checkin is not None:
+        flash("You've already checked into this event!")
+        return redirect(url_for("dashboard.home"))
+
+    checkin = EventCheckins(
+            user_id=current_user.id,
+            event_id=id
+            )
+    db.session.add(checkin)
+    db.session.commit()
+
+    flash("You've successfully checked in!")
+    return redirect(url_for("dashboard.home"))