Start with issue 638 (issue links); nothing workable yet.

src/IDF/Form/Admin/ProjectCreate.php

@@ -319,6 +319,7 @@ class IDF_Form_Admin_ProjectCreate extends Pluf_Form
                            'labels_issue_closed' => IDF_Form_IssueTrackingConf::init_closed,
                            'labels_issue_predefined' =>  IDF_Form_IssueTrackingConf::init_predefined,
                            'labels_issue_one_max' => IDF_Form_IssueTrackingConf::init_one_max,
+                           'issue_relations' => IDF_Form_IssueTrackingConf::init_relations,
                            'webhook_url' => '',
                            'downloads_access_rights' => 'all',
                            'review_access_rights' => 'all',

src/IDF/Form/IssueCreate.php

@@ -109,6 +109,21 @@ class IDF_Form_IssueCreate extends Pluf_Form
                                                                     ),
                                             ));
 
+            $relation_types =  $extra['project']->getRelationsFromConfig();
+            $this->fields['relation_type'] = new Pluf_Form_Field_Varchar(
+                          array('required' => false,
+                                'label' => __('This issue'),
+                                'initial' => $relation_types[0],
+                                'widget_attrs' => array('size' => 15),
+                                ));
+
+            $this->fields['relation_issue'] = new Pluf_Form_Field_Varchar(
+                          array('required' => false,
+                                'label' => null,
+                                'initial' => '',
+                                'widget_attrs' => array('size' => 10),
+                                ));
+
             /*
              * get predefined tags for issues from current project
              *

src/IDF/Form/IssueTrackingConf.php

@@ -72,6 +72,9 @@ Performance          = Performance issue
 Usability            = Affects program usability
 Maintainability      = Hinders future changes';
     const init_one_max = 'Type, Priority, Milestone';
+    const init_relations = 'is related to
+blocks, is blocked by
+duplicates, is duplicated by';
 
     public function initFields($extra=array())
     {
@@ -118,6 +121,15 @@ Maintainability      = Hinders future changes';
                                             'widget_attrs' => array('size' => 60),
                                             ));
 
+        $this->fields['issue_relations'] = new Pluf_Form_Field_Varchar(
+                                      array('required' => true,
+                                            'label' => __('Issue relations'),
+                                            'initial' => self::init_relations,
+                                            'help_text' => __('You can define bidirectional relations like "is related to" or "blocks, is blocked by".'),
+                                            'widget_attrs' => array('rows' => 7,
+                                                                    'cols' => 75),
+                                            'widget' => 'Pluf_Form_Widget_TextareaInput',
+                                            ));
     }
 }
 

src/IDF/Project.php

@@ -233,6 +233,22 @@ class IDF_Project extends Pluf_Model
         return $tags;
     }
 
+    /**
+     * Returns a list of relations which are available in this project
+     *
+     * @return array List of relation names
+     */
+    public function getRelationsFromConfig()
+    {
+        $conf = $this->getConf();
+        $rel = $conf->getVal('issue_relations', IDF_Form_IssueTrackingConf::init_relations);
+        $relations = array();
+        foreach (preg_split("/\015\012|\015|\012/", $rel, -1, PREG_SPLIT_NO_EMPTY) as $s) {
+            $relations = array_merge($relations, preg_split("/\s*,\s*/", $s, 2));
+        }
+        return $relations;
+    }
+
     /**
      * Return membership data.
      *

src/IDF/Views/Issue.php

@@ -643,6 +643,35 @@ class IDF_Views_Issue
                                                $request);
     }
 
+    /**
+     * Renders a JSON string containing completed issue information
+     * based on the queried / partial string
+     */
+    public $autoCompleteIssueList_precond = array('IDF_Precondition::accessIssues');
+    public function autoCompleteIssueList($request, $match)
+    {
+        $prj = $request->project;
+
+        // Autocomplete from jQuery UI works with JSON, this old one still
+        // expects a parsable string; since we'd need to bump jQuery beyond
+        // 1.2.6 for this to use as well, we're trying to cope with the old format.
+        // see http://www.learningjquery.com/2010/06/autocomplete-migration-guide
+
+        $arr = array(
+            'Fo|o' => 110,
+            'Bar' => 111,
+            'Baz' => 112,
+        );
+
+        $out = '';
+        foreach ($arr as $key => $val)
+        {
+            $out .= str_replace('|', '|', $key).'|'.$val."\n";
+        }
+
+        return new Pluf_HTTP_Response($out);
+    }
+
     /**
      * Star/Unstar an issue.
      */
@@ -715,6 +744,15 @@ class IDF_Views_Issue
         }
         $auto['auto_owner'] = substr($auto['auto_owner'], 0, -2);
         unset($auto['_auto_owner']);
+        // Get issue relations
+        $r = $project->getRelationsFromConfig();
+        $auto['auto_relation_types'] = '';
+        foreach ($r as $rt) {
+            $esc = Pluf_esc($rt);
+            $auto['auto_relation_types'] .= sprintf('{ name: "%s", to: "%s" }, ',
+                                                    $esc, $esc);
+        }
+        $auto['auto_relation_types'] = substr($auto['auto_relation_types'], 0, -2);
         return $auto;
     }
 }

src/IDF/Views/Project.php

@@ -344,7 +344,8 @@ class IDF_Views_Project
             $params = array();
             $keys = array('labels_issue_template',
                           'labels_issue_open', 'labels_issue_closed',
-                          'labels_issue_predefined', 'labels_issue_one_max');
+                          'labels_issue_predefined', 'labels_issue_one_max',
+                          'issue_relations');
             foreach ($keys as $key) {
                 $_val = $conf->getVal($key, false);
                 if ($_val !== false) {

src/IDF/conf/urls.php

@@ -173,6 +173,11 @@ $ctl[] = array('regex' => '#^/watchlist/(\w+)$#',
                'model' => 'IDF_Views_Issue',
                'method' => 'forgeWatchList');
 
+$ctl[] = array('regex' => '#^/p/([\-\w]+)/issues/autocomplete/$#',
+               'base' => $base,
+               'model' => 'IDF_Views_Issue',
+               'method' => 'autoCompleteIssueList');
+
 // ---------- SCM ----------------------------------------
 
 $ctl[] = array('regex' => '#^/p/([\-\w]+)/source/help/$#',

src/IDF/templates/idf/admin/issue-tracking.html

@@ -35,6 +35,13 @@
 </td>
 </tr>
 <tr>
+<td colspan="2"><strong>{$form.f.issue_relations.labelTag}:</strong><br />
+{if $form.f.issue_relations.errors}{$form.f.issue_relations.fieldErrors}{/if}
+{$form.f.issue_relations|unsafe}<br />
+<span class="helptext">{$form.f.issue_relations.help_text}</span>
+</td>
+</tr>
+<tr>
 <td colspan="2">
 <input type="submit" value="{trans 'Save Changes'}" name="submit" />
 </td>

src/IDF/templates/idf/issues/create.html

@@ -63,6 +63,15 @@
 </td>
 </tr>
 <tr>
+<th>{$form.f.relation_type.labelTag}:</th>
+<td>
+{if $form.f.relation_type.errors}{$form.f.relation_type.fieldErrors}{/if}
+{if $form.f.relation_issue.errors}{$form.f.relation_issue.fieldErrors}{/if}
+{$form.f.relation_type|unsafe}
+{$form.f.relation_issue|unsafe}
+</td>
+</tr>
+<tr>
 <th>{$form.f.label1.labelTag}:</th>
 <td>
 {if $form.f.label1.errors}{$form.f.label1.fieldErrors}{/if}{$form.f.label1|unsafe}
@@ -123,11 +132,11 @@ $(document).ready(function(){
         });
     var j=0;
     for (j=1;j<4;j=j+1) {
-	if($("tr#form-attachment-"+j+" > td > ul.errorlist").length == 0){
+    if($("tr#form-attachment-"+j+" > td > ul.errorlist").length == 0){
-        	$("#form-attachment-"+j).hide();
+            $("#form-attachment-"+j).hide();
-	}else{
+    }else{
-		$("#form-block-"+(j-1)).remove();
+        $("#form-block-"+(j-1)).remove();
-	}
+    }
     }
     });
 </script>

src/IDF/templates/idf/issues/js-autocomplete.html

@@ -7,49 +7,77 @@
     var auto_labels = [{/literal}{$auto_labels|safe}{literal}];
     var auto_status = [{/literal}{$auto_status|safe}{literal}];
     var auto_owner = [{/literal}{$auto_owner|safe}{literal}];
+    var auto_relation_types = [{/literal}{$auto_relation_types|safe}{literal}];
+
     var j=0;
     for (j=1;j<7;j=j+1) {
   $("#id_label"+j).autocomplete(auto_labels, {
-		minChars: 0,
+        minChars: 0,
-		width: 310,
+        width: 310,
-		matchContains: true,
+        matchContains: true,
-		max: 50,
+        max: 50,
-		highlightItem: false,
+        highlightItem: false,
-		formatItem: function(row, i, max, term) {
+        formatItem: function(row, i, max, term) {
-			return row.to.replace(new RegExp("(" + term + ")", "gi"), "<strong>$1</strong>") + "  <span style='font-size: 80%;'>" + row.name + "</span>";
+            return row.to.replace(new RegExp("(" + term + ")", "gi"), "<strong>$1</strong>") + "  <span style='font-size: 80%;'>" + row.name + "</span>";
-		},
+        },
-		formatResult: function(row) {
+        formatResult: function(row) {
-			return row.to;
+            return row.to;
-		}
+        }
-	});
+    });
 }
   $("#id_status").autocomplete(auto_status, {
-		minChars: 0,
+        minChars: 0,
-		width: 310,
+        width: 310,
-		matchContains: true,
+        matchContains: true,
-		max: 50,
+        max: 50,
-		highlightItem: false,
+        highlightItem: false,
-		formatItem: function(row, i, max, term) {
+        formatItem: function(row, i, max, term) {
-			return row.to.replace(new RegExp("(" + term + ")", "gi"), "<strong>$1</strong>") + "  <span style='font-size: 80%;'>" + row.name + "</span>";
+            return row.to.replace(new RegExp("(" + term + ")", "gi"), "<strong>$1</strong>") + "  <span style='font-size: 80%;'>" + row.name + "</span>";
-		},
+        },
-		formatResult: function(row) {
+        formatResult: function(row) {
-			return row.to;
+            return row.to;
-		}
+        }
-	});
+    });
   $("#id_owner").autocomplete(auto_owner, {
-		minChars: 0,
+        minChars: 0,
-		width: 310,
+        width: 310,
-		matchContains: true,
+        matchContains: true,
-		max: 50,
+        max: 50,
-		highlightItem: false,
+        highlightItem: false,
-		formatItem: function(row, i, max, term) {
+        formatItem: function(row, i, max, term) {
-			return row.to.replace(new RegExp("(" + term + ")", "gi"), "<strong>$1</strong>") + "  <span style='font-size: 80%;'>" + row.name + "</span>";
+            return row.to.replace(new RegExp("(" + term + ")", "gi"), "<strong>$1</strong>") + "  <span style='font-size: 80%;'>" + row.name + "</span>";
-		},
+        },
-		formatResult: function(row) {
+        formatResult: function(row) {
-			return row.to;
+            return row.to;
-		}
+        }
-	});
+    });
-
+  $("#id_relation_type").autocomplete(auto_relation_types, {
+        minChars: 0,
+        width: 310,
+        matchContains: true,
+        max: 50,
+        highlightItem: false,
+        formatItem: function(row, i, max, term) {
+            return row.to.replace(new RegExp("(" + term + ")", "gi"), "<strong>$1</strong>") + "  <span style='font-size: 80%;'>" + row.name + "</span>";
+        },
+        formatResult: function(row) {
+            return row.to;
+        }
+    });
+  $("#id_relation_issue").autocomplete("{/literal}{url 'IDF_Views_Issue::autoCompleteIssueList', array($project.shortname)}{literal}", {
+        minChars: 0,
+        width: 310,
+        matchContains: true,
+        max: 10,
+        delay: 500,
+        highlightItem: false,
+        formatItem: function(row, i, max, term) {
+            return row[1].replace(new RegExp("(" + term + ")", "gi"), "<strong>$1</strong>") + "  <span style='font-size: 80%;'>" + row[0] + "</span>";
+        },
+        formatResult: function(row) {
+            return row[1];
+        }
+    });
   });
 {/literal} //-->
 </script>