Use goal < 0 to mean "no tips, please"; #893

This doesn't enforce no tipping throughout the app but at least enables
turning it off in the UI.

templates/participant.html

@@ -55,7 +55,7 @@ <h2>{{ participant.username }}
     </tr>
 </table>
 
-{% if participant != user %}
+{% if participant != user and participant.goal >= 0 %}
 <div class="nav level-1">
     {% if locked %}
 

templates/profile-edit.html

@@ -79,6 +79,9 @@ <h2>Funding Goal
             Gittip.
             {% elif user.goal == 0 %}
             <span class="i-m">{{ I_M }}</span> here as a patron.
+            {% elif user.goal < 0 %}
+            <span class="i-m">{{ I_M }}</span> here as a patron, and politely
+            decline to receive tips.
             {% else %}
             <span class="i-m">{{ I_M }}</span> grateful for gifts, but
             don't have a specific funding goal.
@@ -91,7 +94,7 @@ <h2>Funding Goal
             <label for="goal-yes"><span class="my">{{ MY }}</span> goal is to
                 receive $</label><input
                 name="goal_custom" id="goal-custom"
-            {% if (user.goal is None) or (user.goal == 0) %}
+            {% if (user.goal is None) or (user.goal <= 0) %}
             {% else %}
             value="{{ locale.format("%.2f", user.goal, grouping=True) }}"
             {% end %} />
@@ -111,6 +114,14 @@ <h2>Funding Goal
             <label for="goal-0"><span class="i-m">{{ I_M }}</span> here as a
                 patron.</label>
 
+            <br />
+
+            <input tabindex="406" type="radio" name="goal" id="goal-negative"
+                   value="-1"
+            {% if user.goal < 0 %} checked="true"{% end %}/>
+            <label for="goal-negative"><span class="i-m">{{ I_M }}</span> here
+                as a patron, and politely decline to receive tips.</label>
+
         </td></tr></table>
     </form>
 

www/assets/%version/profile.js

@@ -272,7 +272,7 @@ $(document).ready(function()
                 newtext += $(label.get(1)).html();
             }
 
-            if (d.goal !== '0.00')
+            if (parseFloat(d.goal) > 0)
                 $('INPUT[name=goal_custom]').val(d.goal);
             $('.goal DIV.view').html(newtext);
             finish_editing_goal();