Add filters + search to admin hackathons page

app/controllers/admin/hackathons_controller.rb

@@ -2,7 +2,15 @@ class Admin::HackathonsController < Admin::BaseController
   before_action :set_hackathon, except: :index
 
   def index
-    @pagy, @hackathons = pagy(Hackathon.all.order(created_at: :desc))
+    @hackathons = Hackathon.all.order(created_at: :desc)
+
+    @query = params[:q]
+    @status = params[:status]
+
+    @hackathons = @hackathons.where("name ILIKE ?", "%#{Hackathon.sanitize_sql_like(@query)}%") if @query.present?
+    @hackathons = @hackathons.where(status: @status) if @status.present?
+
+    @pagy, @hackathons = pagy(@hackathons)
   end
 
   def show

app/views/admin/hackathons/_filters.html.erb

@@ -0,0 +1,15 @@
+<div class="mb3 mt2">
+  <%= form_with method: :get, class: "simple_form mb3" do |form| %>
+    <%= form.hidden_field :status, value: @status if @status.present? %>
+
+    <div style="display: flex">
+      <%= form.text_field :q, placeholder: "Search", value: @query, style: "flex: 1", class: "mr2" %>
+      <button type="submit" class="btn">Search</button>
+    </div>
+  <% end %>
+
+  <%= link_to "All", params.permit(:q).merge(status: nil), class: "mr2", style: ("color: var(--muted); text-decoration: none" unless @status.nil?) %>
+  <% Hackathon.statuses.keys.each do |status| %>
+    <%= link_to status.humanize, params.permit(:q).merge(status:), class: "mr2", style: ("color: var(--muted); text-decoration: none" unless @status == status) %>
+  <% end %>
+</div>

app/views/admin/hackathons/index.html.erb

@@ -2,6 +2,11 @@
 <% @nav_active_item = admin_hackathons_path %>
 <h2 class="title">Hackathons</h2>
 
-<%= render partial: "snippet", collection: @hackathons, as: :hackathon %>
+<%= render "filters" %>
+<% if @hackathons.any? %>
+  <%= render partial: "snippet", collection: @hackathons, as: :hackathon %>
+<% else %>
+  <p>No hackathons to show.</p>
+<% end %>
 
 <%== pagy_nav(@pagy) %>