Give volunteer admins the same shift signup UI

It was very clunky for a volunteer admin to sign up to shifts for
themselves, because the button to do so was replaced with a details
button.

That's now a link from the start time.

Also, an unintended formatting pass on schedule.py.

apps/volunteer/schedule.py

@@ -75,9 +75,7 @@ def schedule():
     venues = VolunteerVenue.get_all()
 
     untrained_roles = [
-        r
-        for r in roles
-        if r["is_interested"] and r["requires_training"] and not r["is_trained"]
+        r for r in roles if r["is_interested"] and r["requires_training"] and not r["is_trained"]
     ]
 
     return render_template(
@@ -97,17 +95,15 @@ def shift(shift_id):
     shift = Shift.query.get_or_404(shift_id)
     all_volunteers = Volunteer.query.order_by(Volunteer.nickname).all()
 
-    return render_template(
-        "volunteer/shift.html", shift=shift, all_volunteers=all_volunteers
-    )
+    return render_template("volunteer/shift.html", shift=shift, all_volunteers=all_volunteers)
 
 
 @volunteer.route("/shift/<shift_id>/sign-up", methods=["POST"])
 @feature_flag("VOLUNTEERS_SCHEDULE")
 @v_user_required
 def shift_sign_up(shift_id):
     shift = Shift.query.get_or_404(shift_id)
-    if current_user.has_permission("volunteer:admin") and request.form["user_id"]:
+    if current_user.has_permission("volunteer:admin") and "user_id" in request.form:
         user = User.query.get(request.form["user_id"])
     else:
         user = current_user
@@ -119,17 +115,10 @@ def shift_sign_up(shift_id):
         return redirect_next_or_schedule(f"Signed up for {shift.role.name} shift")
 
     if shift.current_count >= shift.max_needed:
-        return redirect_next_or_schedule(
-            "This shift is already full. You have not been signed up."
-        )
-
-    if (
-        shift.role.requires_training
-        and shift.role not in Volunteer.get_for_user(current_user).trained_roles
-    ):
-        return redirect_next_or_schedule(
-            "You must complete training before you can sign up for this shift."
-        )
+        return redirect_next_or_schedule("This shift is already full. You have not been signed up.")
+
+    if shift.role.requires_training and shift.role not in Volunteer.get_for_user(current_user).trained_roles:
+        return redirect_next_or_schedule("You must complete training before you can sign up for this shift.")
 
     for shift_entry in user.shift_entries:
         if shift.is_clash(shift_entry.shift):

templates/volunteer/schedule.html

@@ -73,27 +73,35 @@ <h2>Pick your shifts</h2>
                                 {% else %}
                                     <td class="start_time hidden">{{ hour }}</td>
                                 {% endif %}
-                                <td class="end_time">{{ shift.end_time if shift.end else '--' }}</td>
-                                <td class="time mobile-only">{{ hour }}{% if shift.end %} to {{ shift.end_time }}{% endif %}</td>
+                                <td class="end_time">
+                                    {% if current_user.has_permission("volunteer:admin") %}
+                                        <a href="{{ url_for('.shift', shift_id=shift.id) }}">{{ shift.end_time if shift.end else '--' }}</a>
+                                    {% else %}
+                                        {{ shift.end_time if shift.end else '--' }}
+                                    {% endif %}
+                                </td>
+                                <td class="time mobile-only">
+                                    {% if current_user.has_permission("volunteer:admin") %}
+                                        <a href="{{ url_for('.shift', shift_id=shift.id) }}">{{ hour }}{% if shift.end %} to {{ shift.end_time }}{% endif %}</a>
+                                    {% else %}
+                                        {{ hour }}{% if shift.end %} to {{ shift.end_time }}{% endif %}
+                                    {% endif %}
+                                </td>
                                 <td class="venue">{{ shift.venue.name }}</td>
                                 <td class="role">{{ shift.role.name }}</td>
                                 <td class="staffing">{{ shift.current_count }}/{{ shift.max_needed }}</td>
-                                {% if current_user.has_permission("volunteer:admin") %}
-                                    <td class="button"><a href="{{ url_for('.shift', shift_id=shift.id) }}" class="btn btn-block btn-primary">Details</a></td>
-                                {% else %}
-                                    <td class="button">
-                                            {%- if shift.is_user_shift -%}
-                                                <form method="post" action="{{ url_for('.shift_cancel', shift_id=shift.id) }}">
-                                                    <button class="btn btn-block btn-danger">Cancel</button>
-                                                </form>
-                                            {%- else -%}
-                                                <form method="post" action="{{ url_for('.shift_sign_up', shift_id=shift.id) }}">
-                                                    <button class="btn btn-block btn-success">Sign Up</button>
-                                                </form>
-                                            {%- endif -%}
-                                        </form>
-                                    </td>
-                                {% endif %}
+                                <td class="button">
+                                        {%- if shift.is_user_shift -%}
+                                            <form method="post" action="{{ url_for('.shift_cancel', shift_id=shift.id, next=url_for('.schedule', day=active_day)) }}">
+                                                <button class="btn btn-block btn-danger">Cancel</button>
+                                            </form>
+                                        {%- else -%}
+                                            <form method="post" action="{{ url_for('.shift_sign_up', shift_id=shift.id, next=url_for('.schedule', day=active_day)) }}">
+                                                <button class="btn btn-block btn-success">Sign Up</button>
+                                            </form>
+                                        {%- endif -%}
+                                    </form>
+                                </td>
                             </tr>
                         {% endfor %}
                     {% endfor %}