Show meaningful data for each workflow run

Instead of rendering the workflow run id, show what triggered the
workflow run as an Event (and action if applicable) and from where, as a
link to the source (be it a PR or a commit, and the project).

src/api/app/models/workflow_run.rb

@@ -14,6 +14,55 @@ class WorkflowRun < ApplicationRecord
   def update_to_fail(message)
     update(response_body: message, status: 'fail')
   end
+
+  def payload
+    @payload ||= JSON.parse(request_payload)
+  end
+
+  def hook_action
+    payload['action']
+  end
+
+  def parsed_request_headers
+    request_headers.split("\n").each_with_object({}) do |h, headers|
+      k, v = h.split(':')
+      headers[k] = v.strip
+    end
+  end
+
+  def hook_event
+    parsed_request_headers['HTTP_X_GITHUB_EVENT']
+  end
+
+  def repository_name
+    payload['repository']['full_name']
+  end
+
+  def repository_url
+    payload['repository']['html_url']
+  end
+
+  def hook_source_name
+    case hook_event
+    when 'pull_request'
+      "##{payload['pull_request']['number']}"
+    when 'push'
+      "#{payload.dig('head_commit', 'id')}"
+    else
+      payload['repository']['full_name']
+    end
+  end
+
+  def hook_source_url
+    case hook_event
+    when 'pull_request'
+      payload['pull_request']['url']
+    when 'push'
+      payload.dig('head_commit', 'url')
+    else
+      payload['repository']['html_url']
+    end
+  end
 end
 
 # == Schema Information

src/api/app/views/webui/workflow_runs/index.html.haml

@@ -25,7 +25,14 @@
                       - else
                         %i.fas.fa-exclamation-triangle.text-danger{ title: 'Status: failed' }
                   .col.text-left
-                    Workflow Run #{workflow_run.id}
+                    = workflow_run.hook_event.humanize
+                    Event
+                    - if workflow_run.hook_action
+                      %span.badge.badge-primary= workflow_run.hook_action.humanize
+                  .col.text-left
+                    = link_to workflow_run.repository_name, workflow_run.repository_url
+                    - if workflow_run.hook_source_name
+                      = link_to workflow_run.hook_source_name, workflow_run.hook_source_url, { class: 'link-secondary' }
                   .col.text-right
                     = workflow_run.created_at
           .collapse{ id: "workflow-run#{workflow_run.id}", aria: { labelledby: "#workflow-run-heading#{workflow_run.id}" },