[#4] (wip) Custom field mapping configuration

templates/CRM/Twingle/Form/Profile.hlp

@@ -27,3 +27,17 @@
 {htxt id='id-financial_type_id_recur'}
     {ts domain="de.systopia.twingle"}Select which financial type to use for recurring contributions.{/ts}
 {/htxt}
+
+{htxt id='id-custom_field_mapping'}
+    {ts domain="de.systopia.twingle"}<p>Map Twingle custom fields to CiviCRM custom fields using the following format (each assignment in a separate line):</p>
+    <pre>twingle_field_1=custom_123<br />twingle_field_2=custom_789</pre>
+    <p>Always use the <code>custom_[id]</code> notation for CiviCRM custom fields.</p>
+    <p>Only custom fields extending one of the following CiviCRM entities are allowed:</p>
+    <ul>
+      <li><strong>Contact</strong> &ndash; Will be set on the Individual contact</li>
+      <li><strong>Individual</strong> &ndash; Will be set on the Individual contact</li>
+      <li><strong>Organization</strong> &ndash; Will be set on the Organization contact, if an organisation name was submitted</li>
+      <li><strong>Contribution</strong> &ndash; Will be set on the contribution</li>
+      <li><strong>ContributionRecur</strong> &ndash; Will be set on the recurring contribution and deriving single contributions</li>
+    </ul>{/ts}
+{/htxt}

templates/CRM/Twingle/Form/Profile.tpl

@@ -161,7 +161,7 @@
 
     <fieldset>
 
-      <legend>{ts domain="de.systopia.twingle"}Groups{/ts}</legend>
+      <legend>{ts domain="de.systopia.twingle"}Groups and Correlations{/ts}</legend>
 
       <table class="form-layout-compressed">
 
@@ -190,6 +190,28 @@
           <td class="content">{$form.contribution_source.html}</td>
         </tr>
 
+        <tr class="crm-section">
+          <td class="label">
+            {$form.custom_field_mapping.label}
+            <a
+                    onclick='
+                            CRM.help(
+                            "{ts domain="de.systopia.twingle"}Custom field mapping{/ts}",
+                    {literal}{
+                      "id": "id-custom_field_mapping",
+                      "file": "CRM\/Twingle\/Form\/Profile"
+                    }{/literal}
+                            );
+                            return false;
+                            '
+                    href="#"
+                    title="{ts domain="de.systopia.twingle"}Help{/ts}"
+                    class="helpicon"
+            ></a>
+          </td>
+          <td class="content">{$form.custom_field_mapping.html}</td>
+        </tr>
+
       </table>
 
     </fieldset>