Add a report user button

style/base/base.scss

@@ -129,6 +129,16 @@ body {
     }
 }
 
+.btn-signal {
+    $base-color: #aaa;
+    background-color: $base-color;
+    color: #1a171b;
+    &:hover {
+        background-color: #f00;
+        color: #fff;
+    }
+}
+
 input.amount {
     min-width: 5em;
     max-width: 8em;

templates/profile.html

@@ -97,6 +97,9 @@ <h1>{{ participant.username }}</h1>
                             {{ _("Donate") }}
                         </a>
                     % endif
+                    <a class="btn btn-signal btn-lg" href="{{ participant.path('signal') }}">
+                        {{ _("Signal") }}
+                    </a>
                 </div>
             </div>
         </div>

www/%username/signal.spt

@@ -0,0 +1,101 @@
+from liberapay.exceptions import UserDoesntAcceptTips
+from liberapay.utils import get_participant
+
+[---]
+participant = get_participant(state, restrict=False)
+if participant.goal == -1:
+    raise response.error(403, UserDoesntAcceptTips(participant.username))
+
+full_title = _("Signal {0}", participant.username)
+
+[---] text/html
+% extends "templates/profile-base.html"
+
+% from 'templates/elsewhere.html' import account_elsewhere with context
+
+% block head_early
+{{ super() }}
+    <meta property="og:description"
+          content="{{ _('Support {username}\'s work with a recurrent donation.',
+                        username=participant.username) }}">
+% endblock
+
+{% block heading %}{% endblock %}
+
+% block content
+<div class="row">
+<div class="col-md-10 col-md-offset-1 col-lg-8 col-lg-offset-2">
+    <h2>{{ _("Signal {0}", ('<a href="/{0}">{0}</a>'|safe).format(participant.username)) }}</h2>
+
+    % if not participant.hide_receiving
+        % set goal, receiving = participant.goal, participant.receiving
+        % if goal
+            % if receiving
+            <p>{{ _(
+                "{0} currently receives {1} per week, they need your help to reach "
+                "their funding goal ({2} per week)."
+                , participant.username, receiving, goal
+            ) }}</p>
+            % else
+            <p>{{ _(
+                "{0}'s goal is to receive {1} per week."
+                , participant.username, goal
+            ) }} {{ _("Be the first to contribute!") }}</p>
+            % endif
+        % else
+            <p>{{ _(
+                "{0} currently receives {1} per week."
+                , participant.username, receiving
+            ) }}</p>
+        % endif
+    % endif
+
+    <br>
+
+    % set e_accounts = participant.get_accounts_elsewhere()
+    % if e_accounts
+        <h3>{{ _("Recipient Identity") }}</h3>
+        <p>{{ _(
+            "We have confirmed through an automated verification process that "
+            "{0} has control of the following accounts on other platforms:",
+            participant.username
+        ) }}</p>
+        % for platform in website.platforms if platform.name in e_accounts
+            {{ account_elsewhere(platform, e_accounts, None) }}
+        % endfor
+        <br>
+    % endif
+
+    % block form
+    <p>{{ _(
+        "Please add a short description why you want to report this user:"
+    ) }}</p>
+
+    <form action="" method="POST" class="signal">
+        <input type="hidden" name="csrf_token" value="{{ csrf_token }}" />
+
+        <div class="form-group">
+        <textarea name="signal" rows="15"
+                  class="form-control signal vertical-resize"
+                  placeholder={{ _("Say something.") }}
+                  data-confirm-discard="{{ confirm_discard }}"
+            ></textarea>
+        <p class="help-block pull-right">{{ _("Markdown supported.") }}
+            <a href="https://daringfireball.net/projects/markdown/basics"
+               target="_blank" rel="noopener noreferrer">{{ _("What is Markdown?") }}</a>
+        </p>
+        </div>
+
+        <button class="signal btn btn-success" name="signal" value="true">{{ _("Signal") }}</button>
+    % endblock
+
+    <h3>{{ _("Frequently Asked Questions") }}</h3>
+
+    <h4>{{ _("What happen when I signal a user") }}</h4>
+    <p>{{ _(
+        "The profil will be review by the moderator. "
+    ) }}</p>
+
+</div>
+</div>
+% endblock