Init event checkin structure

acmsite/dashboard/__init__.py

@@ -1,9 +1,47 @@
 
-from flask import Blueprint, render_template
+from datetime import datetime
+from flask import Blueprint, current_app, flash, redirect, render_template, url_for
+from flask_login import login_required, current_user
+from ulid import ulid
+
+from acmsite.models import Event, EventCheckin
+from acmsite import db
 
 
 bp = Blueprint('dashboard', __name__, url_prefix='/dashboard')
 
 @bp.route("/")
+@login_required
 def home():
-    return render_template('dashboard.html')
+    now = datetime.now()
+    events = db.session.execute(db.select(Event).where(Event.start_time < now,
+                                                       Event.end_time >
+                                                       now)).scalars()
+    return render_template('dashboard.html', events=events)
+
+@bp.route("/checkin/<string:event_id>")
+@login_required
+def checkin(event_id):
+    # actually first check if the event even exists
+    event = db.get_or_404(Event, event_id)
+    # first check if this user has already checked in
+    checkins = db.session.execute(db.select(EventCheckin).where(EventCheckin.user ==
+                                                     current_user.id,
+                                                     EventCheckin.event
+                                                                ==event_id)).scalar_one_or_none()
+
+    current_app.logger.debug(checkins)
+    if checkins is None:
+        # There's not a checkin already, let's create one!
+        check = EventCheckin(
+                id = ulid(),
+                user = current_user.id,
+                event = event_id)
+        db.session.add(check)
+        db.session.commit()
+
+        flash(f"Checked in to {event.name} successfully")
+        return redirect(url_for("dashboard.home"))
+    else:
+        flash(f"You've already checked in to {event.name}")
+        return redirect(url_for("dashboard.home"))

acmsite/models.py

@@ -80,6 +80,12 @@ class Event(db.Model):
                 "end_time": self.end_time.isoformat(),
                 }
 
+class EventCheckin(db.Model):
+    __tablename__ = "acm_checkins"
+    id = Column(String, primary_key=True)
+    user = Column(String, ForeignKey("acm_users.id"), nullable=False)
+    event = Column(String, ForeignKey("acm_events.id"), nullable=False)
+
 class Link(db.Model):
     __tablename__ = "acm_links"
     id = Column(String, primary_key=True)

acmsite/templates/dashboard.html

@@ -4,6 +4,18 @@
 
 <h1>Welcome back, {{ current_user.first_name }}!</h1>
 
+{% if events %}
+
+<p>The following events are available for check-in:</p>
+{% for e in events %}
+<a href="{{ url_for('dashboard.checkin', event_id=e.id) }}">{{ e.name }}</a>
+{% endfor %}
+{% else %}
+<p>There are no events available for check-in.</p>
+{% endif %}
+
+<hr/>
+
 <p>For a list of upcoming events, take a look at our <a href="{{
                                                               url_for('main.events')
                                                               }}">events

migrations/versions/53a76e988b5a_add_event_checkins.py

@@ -0,0 +1,35 @@
+"""add event checkins
+
+Revision ID: 53a76e988b5a
+Revises: 300f24071c14
+Create Date: 2024-08-25 15:18:22.451548
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '53a76e988b5a'
+down_revision = '300f24071c14'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('acm_checkins',
+    sa.Column('id', sa.String(), nullable=False),
+    sa.Column('user', sa.String(), nullable=False),
+    sa.Column('event', sa.String(), nullable=False),
+    sa.ForeignKeyConstraint(['event'], ['acm_events.id'], ),
+    sa.ForeignKeyConstraint(['user'], ['acm_users.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('acm_checkins')
+    # ### end Alembic commands ###