Bug 312787 When strict_isolation is set, do not permit users to alter deps on bugs unless they can edit both bugs

Patch by Joel Peshkin <bugreport@peshkin.net>
r=kiko, a=justdave

webtools/bugzilla/process_bug.cgi

@@ -165,6 +165,13 @@ foreach my $field ("dependson", "blocked") {
                 $vars->{'field'} = $field;
                 ThrowUserError("illegal_change", $vars);
             }
+            if (Param("strict_isolation")) {
+                my $deltabug = new Bugzilla::Bug($id, $user);
+                if (!$user->can_edit_product($deltabug->{'product_id'})) {
+                    $vars->{'field'} = $field;
+                    ThrowUserError("illegal_change_deps", $vars);
+                }
+            }
         }
     } else {
         # Bugzilla does not support mass-change of dependencies so they

webtools/bugzilla/template/en/default/admin/params/groupsecurity.html.tmpl

@@ -49,6 +49,12 @@
   usevisibilitygroups => "Do you wish to restrict visibility of users to members of " _
                          "specific groups?",
   
-  strict_isolation => "Don't allow users to assign, be qa-contacts or add to CC list " _
-                      "any user that do not have permission to edit the bug." }
+  strict_isolation => "Don't allow users to be assigned to, " _
+                      "be qa-contacts on, " _
+                      "be added to CC list, " _
+                      "or make or remove dependencies " _
+                      "involving any bug that is in a product on which that " _
+                      "user is forbidden to edit.", 
+
+ }
 %]

webtools/bugzilla/template/en/default/global/user-error.html.tmpl

@@ -547,6 +547,13 @@
     [% END %]
     a sufficiently empowered user may change that field.
 
+  [% ELSIF error == "illegal_change_deps" %]
+    [% title = "Not allowed" %]
+    You tried to change the 
+    <strong>[% field_descs.$field FILTER html %]</strong> field 
+    but only a user empowered to edit 
+    both involved [% terms.bugs %] may change that field.
+
   [% ELSIF error == "illegal_changed_in_last_x_days" %]
     [% title = "Your Search Makes No Sense" %]
     The <em>Changed in last ___ days</em> field must be a simple number.