From 497c70791868264ddb0499970ea0323988bdcdb0 Mon Sep 17 00:00:00 2001
From: Byron Jones <glob@mozilla.com>
Date: Mon, 13 Apr 2015 12:38:14 +0800
Subject: Bug 1152818: changing an assignee to nobody@mozilla.org or any .bugs
 address should automatically reset the status to NEW

---
 Bugzilla/Object.pm                                 |  6 +++-
 extensions/BMO/Extension.pm                        | 37 ++++++++++++++++++++++
 .../hook/global/user-error-errors.html.tmpl        |  5 +++
 3 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/Bugzilla/Object.pm b/Bugzilla/Object.pm
index 8a7bba1c5..2349b57e6 100644
--- a/Bugzilla/Object.pm
+++ b/Bugzilla/Object.pm
@@ -520,7 +520,11 @@ sub update {
     $dbh->bz_start_transaction();
 
     my $old_self = $self->new($self->id);
-   
+
+    # BMO - allow altering values in a sane way
+    Bugzilla::Hook::process('object_start_of_update',
+                            { object => $self, old_object => $old_self });
+
     my @all_columns = $self->UPDATE_COLUMNS;
     my @hook_columns;
     Bugzilla::Hook::process('object_update_columns',
diff --git a/extensions/BMO/Extension.pm b/extensions/BMO/Extension.pm
index 52bdd53bc..5472006ed 100644
--- a/extensions/BMO/Extension.pm
+++ b/extensions/BMO/Extension.pm
@@ -735,6 +735,43 @@ sub bug_end_of_create {
     }
 }
 
+# bugs in an ASSIGNED state must be assigned to a real person
+# reset bugs to NEW if the assignee is nobody/.bugs$
+sub object_start_of_update {
+    my ($self, $args) = @_;
+    my ($new_bug, $old_bug) = @$args{qw( object old_object )};
+    return unless $new_bug->isa('Bugzilla::Bug');
+
+    # if either the assignee or status has changed
+    return unless
+        $old_bug->assigned_to->id != $new_bug->assigned_to->id
+        || $old_bug->bug_status ne $new_bug->bug_status;
+
+    # and the bug is now ASSIGNED
+    return unless
+        $new_bug->bug_status eq 'ASSIGNED';
+
+    # and the assignee isn't a real person
+    return unless
+        $new_bug->assigned_to->login eq 'nobody@mozilla.org'
+        || $new_bug->assigned_to->login =~ /\.bugs$/;
+
+    # and the user can set the status to NEW
+    return unless
+        $old_bug->check_can_change_field('bug_status', $old_bug->bug_status, 'NEW');
+
+    # if the user is changing the assignee, silently change the bug's status to new
+    if ($old_bug->assigned_to->id != $new_bug->assigned_to->id) {
+        $new_bug->set_bug_status('NEW');
+    }
+
+    # otherwise the user is trying to set the bug's status to ASSIGNED without
+    # assigning a real person.  throw an error.
+    else {
+        ThrowUserError('bug_status_unassigned');
+    }
+}
+
 # detect github pull requests and reviewboard reviews, set the content-type
 sub attachment_process_data {
     my ($self, $args) = @_;
diff --git a/extensions/BMO/template/en/default/hook/global/user-error-errors.html.tmpl b/extensions/BMO/template/en/default/hook/global/user-error-errors.html.tmpl
index 9caf9bd29..a8be3663f 100644
--- a/extensions/BMO/template/en/default/hook/global/user-error-errors.html.tmpl
+++ b/extensions/BMO/template/en/default/hook/global/user-error-errors.html.tmpl
@@ -41,4 +41,9 @@
   [% title = "Missing Reporter" %]
   You must provide an email address for a bounty attachment.
 
+[% ELSIF error == "bug_status_unassigned" %]
+  [% title = "Invalid Bug Status" %]
+  You cannot set this [% terms.bug %]'s status to ASSIGNED because the
+  [%+ terms.bug %] is not assigned to a person.
+
 [% END %]
-- 
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