feat(master): POLL_INTERVAL, poller wiring and version picker in the UI (#9)

internal/master/web/templates/overview.html

@@ -14,7 +14,7 @@
     <tbody>
     {{range .Services}}
       <tr>
-        <td><a href="/services/{{.ID}}">{{.DisplayName}}</a>{{if .Self}} <span class="badge">managed outside</span>{{end}}{{if .AvailableRef}} <span class="badge badge-update" title="{{.AvailableRef}}">update available</span>{{end}}</td>
+        <td><a href="/services/{{.ID}}">{{.DisplayName}}</a>{{if .Self}} <span class="badge">managed outside</span>{{end}}{{if .AvailableRef}} <span class="badge badge-update" title="{{.AvailableRef}}">update available</span>{{end}}{{if followsNoTag .Service}} <span class="badge">follows no tag</span>{{end}}{{if .LastPollError}} <span class="badge badge-error" title="{{.LastPollError}}">poll failed</span>{{end}}</td>
         <td><code>{{shortRef .ActualRef}}</code></td>
         <td class="status status-{{.Status}}">{{.Status}}</td>
         <td>{{.UpdateMode}}

internal/master/web/templates/service.html

@@ -10,6 +10,7 @@
   {{if .Service.DesiredRef}}<tr><th>Desired image</th><td><code>{{shortRef .Service.DesiredRef}}</code></td></tr>{{end}}
   {{if .Service.AvailableRef}}<tr><th>Available</th><td><code>{{.Service.AvailableRef}}</code> <span class="muted">via {{.Service.AvailableSource}}{{with .Service.AvailableAt}}, {{.Format "2006-01-02 15:04"}}{{end}}</span></td></tr>{{end}}
   <tr><th>Mode</th><td>{{.Service.UpdateMode}}</td></tr>
+  <tr><th>Polling</th><td{{if .PollFailed}} class="error"{{end}}>{{.Polling}}</td></tr>
   {{if .ConfigFiles}}<tr><th>Config files</th><td>{{range .ConfigFiles}}<code>{{.}}</code><br>{{end}}</td></tr>{{end}}
 </table>
 {{if .Reason}}
@@ -31,6 +32,28 @@
   <p class="muted">{{if .AutoBlocked}}Auto unavailable: {{.AutoBlocked}}.{{else}}The webhook will update this service as soon as CI pushes a new image.{{end}}</p>
   {{end}}
 </form>
+<h2>Versions</h2>
+{{if eq .Service.UpdateMode "auto"}}<p class="warning">This service is in auto mode: a version picked here is replaced again when a newer version is announced or found by polling.</p>{{end}}
+<table>
+  <thead><tr><th>Version</th><th>Seen via</th><th>First seen</th><th></th></tr></thead>
+  <tbody>
+  {{range .Versions}}
+    <tr>
+      <td><code title="{{.Ref}}">{{shortRef .Ref}}</code>{{if .Running}} <span class="badge">running</span>{{end}}{{if not .Tag}} <span class="muted">the service will follow no tag afterwards</span>{{end}}</td>
+      <td>{{.Source}}</td>
+      <td>{{.FirstSeenAt.Format "2006-01-02 15:04"}}</td>
+      <td>{{if not $.AutoBlocked}}
+        <form method="post" action="/services/{{$.Service.ID}}/update">
+          <input type="hidden" name="csrf_token" value="{{$.CSRF}}">
+          <input type="hidden" name="version" value="{{.ID}}">
+          <button type="submit">Deploy</button>
+        </form>{{end}}</td>
+    </tr>
+  {{else}}
+    <tr><td colspan="4">No versions seen yet.</td></tr>
+  {{end}}
+  </tbody>
+</table>
 <h2>Update history</h2>
 <div id="history" hx-get="/fragments/services/{{.Service.ID}}/jobs" hx-trigger="sse:jobs" hx-swap="innerHTML">
   {{template "history" .}}