Bug 1307485 - Add code to run a subset of buglist.cgi search queries against the ES backend

12 files changed, 656 insertions, 55 deletions

diff --git a/Bugzilla/Bug.pm b/Bugzilla/Bug.pm
index cba973863..bc099f76e 100644
--- a/Bugzilla/Bug.pm
+++ b/Bugzilla/Bug.pm
@@ -303,19 +303,15 @@ with 'Bugzilla::Elastic::Role::Object';
 sub ES_TYPE {'bug'}
 
 sub _bz_field {
-    my ($field, $type, $analyzer, @fields) = @_;
+    my ($field, @fields) = @_;
 
     return (
         $field => {
-            type     => $type,
-            analyzer => $analyzer,
+            type     => 'string',
+            analyzer => 'bz_text_analyzer',
             fields => {
-                raw => {
-                    type  => 'string',
-                    index => 'not_analyzed',
-                },
                 eq => {
-                    type => 'string',
+                    type     => 'string',
                     analyzer => 'bz_equals_analyzer',
                 },
                 @fields,
@@ -324,32 +320,20 @@ sub _bz_field {
     );
 }
 
-sub _bz_text_field {
-    my ($field) = @_;
-
-    return _bz_field($field, 'string', 'bz_text_analyzer');
-}
-
-sub _bz_substring_field {
-    my ($field, @rest) = @_;
-
-    return _bz_field($field, 'string', 'bz_substring_analyzer', @rest);
-}
-
 sub ES_PROPERTIES {
     return {
-        priority          => { type => 'string', analyzer => 'keyword' },
-        bug_severity      => { type => 'string', analyzer => 'keyword' },
-        bug_status        => { type => 'string', analyzer => 'keyword' },
-        resolution        => { type => 'string', analyzer => 'keyword' },
-        keywords          => { type => 'string' },
+        _bz_field('priority'),
+        _bz_field('bug_severity'),
+        _bz_field('bug_status'),
+        _bz_field('resolution'),
         status_whiteboard => { type => 'string', analyzer => 'whiteboard_shingle_tokens' },
         delta_ts          => { type => 'string', index => 'not_analyzed' },
-        _bz_substring_field('product'),
-        _bz_substring_field('component'),
-        _bz_substring_field('classification'),
-        _bz_text_field('short_desc'),
-        _bz_substring_field('assigned_to'),
+        _bz_field('product'),
+        _bz_field('component'),
+        _bz_field('classification'),
+        _bz_field('short_desc'),
+        _bz_field('assigned_to'),
+        _bz_field('reporter'),
     };
 }
 
@@ -426,7 +410,7 @@ sub es_document {
         bug_id            => $self->id,
         product           => $self->product_obj->name,
         alias             => $self->alias,
-        keywords          => $self->keywords,
+        keywords          => [ map { $_->name } @{$self->keyword_objects} ],
         priority          => $self->priority,
         bug_status        => $self->bug_status,
         resolution        => $self->resolution,
@@ -435,6 +419,7 @@ sub es_document {
         status_whiteboard => $self->status_whiteboard,
         short_desc        => $self->short_desc,
         assigned_to       => $self->assigned_to->login,
+        reporter          => $self->reporter->login,
         delta_ts          => $self->delta_ts,
         bug_severity      => $self->bug_severity,
     };
diff --git a/Bugzilla/Elastic.pm b/Bugzilla/Elastic.pm
new file mode 100644
index 000000000..6384269fd
--- /dev/null
+++ b/Bugzilla/Elastic.pm
@@ -0,0 +1,47 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# This Source Code Form is "Incompatible With Secondary Licenses", as
+# defined by the Mozilla Public License, v. 2.0.
+package Bugzilla::Elastic;
+use 5.10.1;
+use Moo;
+
+use Bugzilla::Elastic::Search;
+use Bugzilla::Util qw(trick_taint);
+
+with 'Bugzilla::Elastic::Role::HasClient';
+with 'Bugzilla::Elastic::Role::HasIndexName';
+
+sub suggest_users {
+    my ($self, $text) = @_;
+    my $field = 'suggest_user';
+    if ($text =~ /^:(.+)$/) {
+        $text = $1;
+        $field = 'suggest_nick';
+    }
+
+    my $result = eval {
+        $self->client->suggest(
+            index => $self->index_name,
+            body  => {
+                $field => {
+                    text       => $text,
+                    completion => { field => $field, size => 25 },
+                }
+            }
+        );
+    };
+    if (defined $result) {
+        return [ map { $_->{payload} } @{$result->{$field}[0]{options}} ];
+    }
+    else {
+        warn "suggest_users error: $@";
+        my $users = Bugzilla::User::match($text, 25, 0);
+        return [ map { { real_name => $_->name, name => $_->login } } @$users];
+    }
+}
+
+
+1;
diff --git a/Bugzilla/Elastic/Indexer.pm b/Bugzilla/Elastic/Indexer.pm
index 82f946af9..dd71a7198 100644
--- a/Bugzilla/Elastic/Indexer.pm
+++ b/Bugzilla/Elastic/Indexer.pm
@@ -23,7 +23,7 @@ has 'mtime' => (
 has 'shadow_dbh' => ( is => 'lazy' );
 
 has 'debug_sql' => (
-    is => 'ro',
+    is      => 'ro',
     default => 0,
 );
 
@@ -40,24 +40,24 @@ sub create_index {
         index => $self->index_name,
         body => {
             settings => {
-                number_of_shards => 1,
+                number_of_shards => 2,
                 analysis => {
+                    filter => {
+                        asciifolding_original => { 
+                            type              => "asciifolding",
+                            preserve_original => \1,
+                        },
+                    },
                     analyzer => {
                         folding => {
-                            type      => 'standard',
                             tokenizer => 'standard',
-                            filter    => [ 'lowercase', 'asciifolding' ]
+                            filter    => ['standard', 'lowercase', 'asciifolding_original'],
                         },
                         bz_text_analyzer => {
                             type             => 'standard',
                             filter           => ['lowercase', 'stop'],
                             max_token_length => '20'
                         },
-                        bz_substring_analyzer => {
-                            type      => 'custom',
-                            filter    => ['lowercase'],
-                            tokenizer => 'bz_ngram_tokenizer',
-                        },
                         bz_equals_analyzer => {
                             type   => 'custom',
                             filter => ['lowercase'],
@@ -71,25 +71,20 @@ sub create_index {
                         whiteboard_shingle_words => {
                             type => 'custom',
                             tokenizer => 'whiteboard_words_pattern',
-                            filter => ['stop', 'shingle']
+                            filter => ['stop', 'shingle', 'lowercase']
                         },
                         whiteboard_tokens => {
                             type => 'custom',
                             tokenizer => 'whiteboard_tokens_pattern',
-                            filter => ['stop']
+                            filter => ['stop', 'lowercase']
                         },
                         whiteboard_shingle_tokens => {
                             type => 'custom',
                             tokenizer => 'whiteboard_tokens_pattern',
-                            filter => ['stop', 'shingle']
+                            filter => ['stop', 'shingle', 'lowercase']
                         }
                     },
                     tokenizer => {
-                        bz_ngram_tokenizer => {
-                            type => 'nGram',
-                            min_ngram => 2,
-                            max_ngram => 25,
-                        },
                         whiteboard_tokens_pattern => {
                             type => 'pattern',
                             pattern => '\\s*([,;]*\\[|\\][\\s\\[]*|[;,])\\s*'
diff --git a/Bugzilla/Elastic/Role/Search.pm b/Bugzilla/Elastic/Role/Search.pm
new file mode 100644
index 000000000..9446e0da8
--- /dev/null
+++ b/Bugzilla/Elastic/Role/Search.pm
@@ -0,0 +1,16 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# This Source Code Form is "Incompatible With Secondary Licenses", as
+# defined by the Mozilla Public License, v. 2.0.
+package Bugzilla::Elastic::Role::Search;
+
+use 5.10.1;
+use strict;
+use warnings;
+use Role::Tiny;
+
+requires qw(data search_description invalid_order_columns order);
+
+1;
diff --git a/Bugzilla/Elastic/Search.pm b/Bugzilla/Elastic/Search.pm
new file mode 100644
index 000000000..5c60f2353
--- /dev/null
+++ b/Bugzilla/Elastic/Search.pm
@@ -0,0 +1,425 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# This Source Code Form is "Incompatible With Secondary Licenses", as
+# defined by the Mozilla Public License, v. 2.0.
+package Bugzilla::Elastic::Search;
+
+use 5.10.1;
+use Moo;
+use Bugzilla::Search;
+use Bugzilla::Search::Quicksearch;
+use Bugzilla::Util qw(trick_taint);
+use namespace::clean;
+
+use Bugzilla::Elastic::Search::FakeCGI;
+
+
+has 'quicksearch' => ( is => 'ro' );
+has 'limit'       => ( is => 'ro', predicate => 'has_limit' );
+has 'offset'      => ( is => 'ro', predicate => 'has_offset' );
+has 'fields'      => ( is => 'ro', isa => \&_arrayref_of_fields, default => sub { [] } );
+has 'params'      => ( is => 'lazy' );
+has 'clause'      => ( is => 'lazy' );
+has 'es_query'    => ( is => 'lazy' );
+has 'search_description' => (is => 'lazy');
+has 'query_time'  => ( is => 'rwp' );
+
+has '_input_order' => ( is => 'ro', init_arg => 'order', required => 1);
+has '_order'       => ( is => 'lazy', init_arg => undef );
+has 'invalid_order_columns' => ( is => 'lazy' );
+
+with 'Bugzilla::Elastic::Role::HasClient';
+with 'Bugzilla::Elastic::Role::HasIndexName';
+with 'Bugzilla::Elastic::Role::Search';
+
+my @SUPPORTED_FIELDS = qw(
+    bug_id product component short_desc
+    priority status_whiteboard bug_status resolution
+    keywords alias assigned_to reporter delta_ts
+    longdesc cf_crash_signature classification bug_severity
+    commenter
+);
+my %IS_SUPPORTED_FIELD = map { $_ => 1 } @SUPPORTED_FIELDS;
+
+$IS_SUPPORTED_FIELD{relevance} = 1;
+
+my @NORMAL_FIELDS = qw(
+    priority
+    bug_severity
+    bug_status
+    resolution
+    product
+    component
+    classification
+    short_desc
+    assigned_to
+    reporter
+);
+
+my %SORT_MAP = (
+    bug_id      => '_id',
+    relevance   => '_score',
+    map { $_ => "$_.eq" } @NORMAL_FIELDS,
+);
+
+my %EQUALS_MAP = (
+    map { $_ => "$_.eq" } @NORMAL_FIELDS,
+);
+
+sub _arrayref_of_fields {
+    my $f = $_;
+    foreach my $field (@$f) {
+        Bugzilla::Elastic::Search::UnsupportedField->throw(field => $field)
+           unless $IS_SUPPORTED_FIELD{$field};
+    }
+}
+
+sub data {
+    my ($self) = @_;
+    my $body = $self->es_query;
+    my $result = eval {
+        $self->client->search(
+            index => $self->index_name,
+            type => 'bug',
+            body => $body,
+        );
+    };
+    if (!$result) {
+        die $@;
+    }
+    $self->_set_query_time($result->{took} / 1000);
+    my (@ids, %hits);
+    my $fields = $self->fields;
+    foreach my $hit (@{ $result->{hits}{hits} }) {
+        push @ids, $hit->{_id};
+        my $source = $hit->{_source};
+        $source->{relevance} = $hit->{_score};
+        foreach my $val (values %$source) {
+            next unless defined $val;
+            trick_taint($val);
+        }
+        trick_taint($hit->{_id});
+        if ($source) {
+            $hits{$hit->{_id}} = [ @$source{@$fields} ];
+        }
+        else {
+           $hits{$hit->{_id}} = $hit->{_id};
+        }
+    }
+    my $visible_ids = Bugzilla->user->visible_bugs(\@ids);
+
+    return [ map { $hits{$_} } @$visible_ids ];
+}
+
+sub _valid_order {
+    my ($self) = @_;
+
+    return grep { $IS_SUPPORTED_FIELD{$_->[0]} } @{$self->_order};
+}
+
+sub order {
+    my ($self) = @_;
+
+    return map { $_->[0] } $self->_valid_order;
+}
+
+sub _quicksearch_to_params {
+    my ($quicksearch) = @_;
+    no warnings 'redefine';
+    my $cgi = Bugzilla::Elastic::Search::FakeCGI->new;
+    local *Bugzilla::cgi = sub { $cgi };
+    local $Bugzilla::Search::Quicksearch::ELASTIC = 1;
+    quicksearch($quicksearch);
+
+    return $cgi->params;
+}
+
+sub _build_fields { return \@SUPPORTED_FIELDS }
+
+sub _build__order {
+    my ($self) = @_;
+    
+    my @order;
+    foreach my $order (@{$self->_input_order}) {
+        if ($order =~ /^(.+)\s+(asc|desc)$/i) {
+            push @order, [ $1, lc $2 ];
+        }
+        else {
+            push @order, [ $order ];
+        }
+    }
+    return \@order;
+}
+
+sub _build_invalid_order_columns {
+    my ($self) = @_;
+
+    return [ map { $_->[0] } grep { !$IS_SUPPORTED_FIELD{$_->[0]} } @{ $self->_order } ];
+}
+
+sub _build_params {
+    my ($self) = @_;
+
+    return _quicksearch_to_params($self->quicksearch);
+}
+
+sub _build_clause {
+    my ($self) = @_;
+    my $search = Bugzilla::Search->new(params => $self->params);
+
+    return $search->_params_to_data_structure;
+}
+
+sub _build_search_description {
+    my ($self) = @_;
+
+    return [_describe($self->clause)];
+}
+
+sub _describe {
+    my ($thing) = @_;
+    
+    state $class_to_func = {
+        'Bugzilla::Search::Condition' => \&_describe_condition,
+        'Bugzilla::Search::Clause'    => \&_describe_clause
+    };
+
+    my $func = $class_to_func->{ref $thing} or die "nothing for $thing\n";
+
+    return $func->($thing);
+}
+
+sub _describe_clause {
+   my ($clause) = @_;
+
+   return map { _describe($_) } @{$clause->children};
+}
+
+sub _describe_condition {
+    my ($cond) = @_;
+
+    return { field => $cond->field, type => $cond->operator, value => _describe_value($cond->value) };
+}
+
+sub _describe_value {
+    my ($val) = @_;
+
+    return ref($val) ? join(", ", @$val) : $val;
+}
+
+sub _build_es_query {
+    my ($self) = @_;
+    my @extra;
+
+    if ($self->_valid_order) {
+        my @sort = map {
+            my $f = $SORT_MAP{$_->[0]} // $_->[0];
+            @$_ > 1 ? { $f => lc $_[1] } : $f;
+        } $self->_valid_order;
+        push @extra, sort => \@sort;
+    }
+    if ($self->has_offset) {
+        push @extra, from => $self->offset;
+    }
+    my $max_limit = Bugzilla->params->{max_search_results};
+    my $limit     = Bugzilla->params->{default_search_limit};
+    if ($self->has_limit) {
+        if ($self->limit) {
+            my $l = $self->limit;
+            $limit = $l < $max_limit ? $l : $max_limit;
+        }
+        else {
+            $limit = $max_limit;
+        }
+    }
+    push @extra, size => $limit;
+    return {
+        _source => @{$self->fields} ? \1 : \0,
+        query => _query($self->clause),
+        @extra,
+    };
+}
+
+sub _query {
+    my ($thing) = @_;
+    state $class_to_func = {
+        'Bugzilla::Search::Condition' => \&_query_condition,
+        'Bugzilla::Search::Clause'    => \&_query_clause,
+    };
+
+    my $func = $class_to_func->{ref $thing} or die "nothing for $thing\n";
+
+    return $func->($thing);
+}
+
+sub _query_condition {
+    my ($cond) = @_;
+    state $operator_to_es = {
+        equals    => \&_operator_equals,
+        substring => \&_operator_substring,
+        anyexact  => \&_operator_anyexact,
+        anywords  => \&_operator_anywords,
+        allwords  => \&_operator_allwords,
+    };
+
+    my $field    = $cond->field;
+    my $operator = $cond->operator;
+    my $value    = $cond->value;
+
+    if ($field eq 'resolution') {
+        $value = [ map { $_ eq '---' ? '' : $_ } ref $value ? @$value : $value ];
+    }
+
+    unless ($IS_SUPPORTED_FIELD{$field}) {
+        Bugzilla::Elastic::Search::UnsupportedField->throw(field => $field);
+    }
+
+    my $op = $operator_to_es->{$operator}
+      or Bugzilla::Elastic::Search::UnsupportedOperator->throw(operator => $operator);
+
+    my $result;
+    if (ref $op) {
+        $result = $op->($field, $value);
+    } else {
+        $result = { $op => { $field => $value } };
+    }
+
+    return $result;
+}
+
+# is equal to any of the strings
+sub _operator_anyexact {
+    my ($field, $value) = @_;
+    my @values = ref $value ? @$value : split(/\s*,\s*/, $value);
+    if (@values == 1) {
+        return _operator_equals($field, $values[0]);
+    }
+    else {
+        return {
+            terms => {
+                $EQUALS_MAP{$field} // $field => [map { lc } @values],
+                minimum_should_match => 1,
+            },
+        };
+    }
+}
+
+# contains any of the words
+sub _operator_anywords {
+    my ($field, $value) = @_;
+    return {
+        match => {
+            $field => { query => $value, operator => "or" }
+        },
+    };
+}
+
+# contains all of the words
+sub _operator_allwords {
+    my ($field, $value) = @_;
+    return {
+        match => {
+            $field => { query => $value, operator => "and" }
+        },
+    };
+}
+
+sub _operator_equals {
+    my ($field, $value) = @_;
+    return {
+        match => {
+            $EQUALS_MAP{$field} // $field => $value,
+        },
+    };
+}
+
+sub _operator_substring {
+    my ($field, $value) = @_;
+    my $is_insider = Bugzilla->user->is_insider;
+
+    if ($field eq 'longdesc') {
+        return {
+            has_child => {
+                type => 'comment',
+                query => {
+                    bool => {
+                        must => [
+                            { match => { body => { query => $value, operator => "and" } } },
+                            $is_insider ? () : { term => { is_private => \0 } },
+                        ],
+                    },
+                },
+            },
+        }
+    }
+    elsif ($field eq 'reporter' or $field eq 'assigned_to') {
+        return {
+            prefix => {
+                $EQUALS_MAP{$field} // $field => lc $value,
+            }
+        }
+    }
+    else {
+        return {
+            wildcard => {
+                $EQUALS_MAP{$field} // $field => lc "*$value*",
+            }
+        };
+    }
+}
+
+sub _query_clause {
+    my ($clause) = @_;
+
+    state $joiner_to_func = {
+        AND => \&_join_and,
+        OR  => \&_join_or,
+    };
+
+    my @children = grep { !$_->isa('Bugzilla::Search::Clause') || @{$_->children} } @{$clause->children};
+    if (@children == 1) {
+        return _query($children[0]);
+    }
+
+    return $joiner_to_func->{$clause->joiner}->([ map { _query($_) } @children ]);
+}
+
+sub _join_and {
+    my ($children) = @_;
+    return { bool => { must => $children } },
+}
+
+sub _join_or {
+    my ($children) = @_;
+    return { bool => { should => $children } };
+}
+
+# Exceptions
+BEGIN {
+    package Bugzilla::Elastic::Search::Redirect;
+    use Moo;
+
+    with 'Throwable';
+
+    has 'redirect_args' => (is => 'ro', required => 1);
+    
+    package Bugzilla::Elastic::Search::UnsupportedField;
+    use Moo;
+    use overload q{""} => sub { "Unsupported field: ", $_[0]->field }, fallback => 1;
+
+    with 'Throwable';
+
+    has 'field' => (is => 'ro', required => 1);
+
+    
+    package Bugzilla::Elastic::Search::UnsupportedOperator;
+    use Moo;
+
+    with 'Throwable';
+
+    has 'operator' => (is => 'ro', required => 1);
+}
+
+1;
diff --git a/Bugzilla/Elastic/Search/FakeCGI.pm b/Bugzilla/Elastic/Search/FakeCGI.pm
new file mode 100644
index 000000000..827c96c52
--- /dev/null
+++ b/Bugzilla/Elastic/Search/FakeCGI.pm
@@ -0,0 +1,43 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# This Source Code Form is "Incompatible With Secondary Licenses", as
+# defined by the Mozilla Public License, v. 2.0.
+package Bugzilla::Elastic::Search::FakeCGI;
+use 5.10.1;
+use Moo;
+use namespace::clean;
+
+has 'params' => (is => 'ro', default => sub { {} });
+
+# we pretend to be Bugzilla::CGI at times.
+sub canonicalise_query {
+    return Bugzilla::CGI::canonicalise_query(@_);
+}
+
+sub delete {
+    my ($self, $key) = @_;
+    delete $self->params->{$key};
+}
+
+sub redirect {
+    my ($self, @args) = @_;
+
+    Bugzilla::Elastic::Search::Redirect->throw(redirect_args => \@args);
+}
+
+sub param {
+    my ($self, $key, $val, @rest) = @_;
+    if (@_ > 3) {
+        $self->params->{$key} = [$val, @rest];
+    } elsif (@_ == 3) {
+        $self->params->{$key} = $val;
+    } elsif (@_ == 2) {
+        return $self->params->{$key};
+    } else {
+        return $self->params
+    }
+}
+
+1;
diff --git a/Bugzilla/Search/Quicksearch.pm b/Bugzilla/Search/Quicksearch.pm
index 4f11a3f54..462a9ba85 100644
--- a/Bugzilla/Search/Quicksearch.pm
+++ b/Bugzilla/Search/Quicksearch.pm
@@ -127,7 +127,7 @@ use constant COMPONENT_EXCEPTIONS => (
 );
 
 # Quicksearch-wide globals for boolean charts.
-our ($chart, $and, $or, $fulltext, $bug_status_set);
+our ($chart, $and, $or, $fulltext, $bug_status_set, $ELASTIC);
 
 sub quicksearch {
     my ($searchstring) = (@_);
@@ -587,7 +587,8 @@ sub _default_quicksearch_word {
     addChart('alias', 'substring', $word, $negate);
     addChart('short_desc', 'substring', $word, $negate);
     addChart('status_whiteboard', 'substring', $word, $negate);
-    addChart('content', 'matches', _matches_phrase($word), $negate) if $fulltext;
+    addChart('longdesc', 'substring', $word, $negate) if $ELASTIC;
+    addChart('content', 'matches', _matches_phrase($word), $negate) if $fulltext && !$ELASTIC;
 
     # BMO Bug 664124 - Include the crash signature (sig:) field in default quicksearches
     addChart('cf_crash_signature',  'substring',  $word,  $negate);
@@ -617,6 +618,7 @@ sub _handle_urls {
 # Quote and escape a phrase appropriately for a "content matches" search.
 sub _matches_phrase {
     my ($phrase) = @_;
+    return $phrase if $ELASTIC;
     $phrase =~ s/"/\\"/g;
     return "\"$phrase\"";
 }
diff --git a/Bugzilla/User.pm b/Bugzilla/User.pm
index 69885f57c..e8ddc0be7 100644
--- a/Bugzilla/User.pm
+++ b/Bugzilla/User.pm
@@ -128,7 +128,7 @@ with 'Bugzilla::Elastic::Role::Object';
 
 sub ES_TYPE { 'user' }
 
-sub ES_OBJECTS_AT_ONCE { 2000 }
+sub ES_OBJECTS_AT_ONCE { 5000 }
 
 sub ES_SELECT_UPDATED_SQL {
     my ($class, $mtime) = @_;
@@ -150,7 +150,7 @@ sub ES_SELECT_ALL_SQL {
     my $id = $class->ID_FIELD;
     my $table = $class->DB_TABLE;
 
-    return ("SELECT $id FROM $table WHERE $id > ? AND is_enabled ORDER BY $id", [$last_id // 0]);
+    return ("SELECT $id FROM $table WHERE $id > ? AND is_enabled AND NOT disabledtext ORDER BY $id", [$last_id // 0]);
 }
 
 sub ES_PROPERTIES {
@@ -175,7 +175,6 @@ sub ES_PROPERTIES {
 
 sub es_document {
     my ( $self, $timestamp ) = @_;
-    my $weight = eval { $self->last_activity_ts ? datetime_from($self->last_activity_ts)->epoch : 0 } // 0;
     my $doc = {
         login          => $self->login,
         name           => $self->name,
@@ -184,7 +183,6 @@ sub es_document {
             input => [ $self->login, $self->name ],
             output => $self->identity,
             payload => { name => $self->login, real_name => $self->name },
-            weight => $weight,
         },
     };
     if ($self->name && $self->name =~ /:(\w+)/) {
@@ -193,7 +191,6 @@ sub es_document {
             input => [ $ircnick ],
             output => $self->login,
             payload => { name => $self->login, real_name => $self->name, ircnick => $ircnick },
-            weight => $weight,
         };
     }
 
diff --git a/Bugzilla/WebService/Constants.pm b/Bugzilla/WebService/Constants.pm
index bf3a93fd5..1399513c5 100644
--- a/Bugzilla/WebService/Constants.pm
+++ b/Bugzilla/WebService/Constants.pm
@@ -290,6 +290,7 @@ sub WS_DISPATCH {
         'Product'        => 'Bugzilla::WebService::Product',
         'Group'          => 'Bugzilla::WebService::Group',
         'BugUserLastVisit' => 'Bugzilla::WebService::BugUserLastVisit',
+        'Elastic'        => 'Bugzilla::WebService::Elastic',
         %hook_dispatch
     };
     return $dispatch;
diff --git a/Bugzilla/WebService/Elastic.pm b/Bugzilla/WebService/Elastic.pm
new file mode 100644
index 000000000..3a33a1dba
--- /dev/null
+++ b/Bugzilla/WebService/Elastic.pm
@@ -0,0 +1,59 @@
+# -*- Mode: perl; indent-tabs-mode: nil -*-
+#
+# The contents of this file are subject to the Mozilla Public
+# License Version 1.1 (the "License"); you may not use this file
+# except in compliance with the License. You may obtain a copy of
+# the License at http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS
+# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+# implied. See the License for the specific language governing
+# rights and limitations under the License.
+#
+# The Original Code is the Bugzilla Bug Tracking System.
+#
+# Contributor(s): Marc Schumann <wurblzap@gmail.com>
+#                 Max Kanat-Alexander <mkanat@bugzilla.org>
+#                 Mads Bondo Dydensborg <mbd@dbc.dk>
+#                 Noura Elhawary <nelhawar@redhat.com>
+
+package Bugzilla::WebService::Elastic;
+
+use 5.10.1;
+use strict;
+use warnings;
+use base qw(Bugzilla::WebService);
+
+use Bugzilla;
+use Bugzilla::Constants;
+use Bugzilla::Error;
+use Bugzilla::WebService::Util qw(validate);
+use Bugzilla::Util qw(trim detaint_natural trick_taint);
+
+use constant READ_ONLY => qw( suggest_users );
+use constant PUBLIC_METHODS => qw( suggest_users );
+
+sub suggest_users {
+    my ($self, $params) = @_;
+
+    Bugzilla->switch_to_shadow_db();
+
+    ThrowCodeError('params_required', { function => 'Elastic.suggest_users', params => ['match'] })
+      unless defined $params->{match};
+
+    ThrowUserError('user_access_by_match_denied')
+      unless Bugzilla->user->id;
+
+    trick_taint($params->{match});
+    my $results = Bugzilla->elastic->suggest_users($params->{match} . "");
+    my @users = map {
+        {
+            real_name => $self->type(string => $_->{real_name}),
+            name      => $self->type(email  => $_->{name}),
+        }
+    } @$results;
+
+    return { users => \@users };
+}
+
+1;
\ No newline at end of file
diff --git a/Bugzilla/WebService/Server/REST.pm b/Bugzilla/WebService/Server/REST.pm
index d9381b2c8..6e1944061 100644
--- a/Bugzilla/WebService/Server/REST.pm
+++ b/Bugzilla/WebService/Server/REST.pm
@@ -29,6 +29,7 @@ use Bugzilla::WebService::Server::REST::Resources::Group;
 use Bugzilla::WebService::Server::REST::Resources::Product;
 use Bugzilla::WebService::Server::REST::Resources::User;
 use Bugzilla::WebService::Server::REST::Resources::BugUserLastVisit;
+use Bugzilla::WebService::Server::REST::Resources::Elastic;
 
 use List::MoreUtils qw(uniq);
 use Scalar::Util qw(blessed reftype);
diff --git a/Bugzilla/WebService/Server/REST/Resources/Elastic.pm b/Bugzilla/WebService/Server/REST/Resources/Elastic.pm
new file mode 100644
index 000000000..2f7c1eaa4
--- /dev/null
+++ b/Bugzilla/WebService/Server/REST/Resources/Elastic.pm
@@ -0,0 +1,30 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# This Source Code Form is "Incompatible With Secondary Licenses", as
+# defined by the Mozilla Public License, v. 2.0.
+
+package Bugzilla::WebService::Server::REST::Resources::Elastic;
+
+use 5.10.1;
+use strict;
+use warnings;
+
+use Bugzilla::WebService::Constants;
+use Bugzilla::WebService::Elastic;
+
+BEGIN {
+    *Bugzilla::WebService::Elastic::rest_resources = \&_rest_resources;
+};
+
+sub _rest_resources {
+    my $rest_resources = [
+        qr{^/elastic/suggest_users$}, {
+            GET  => { method => 'suggest_users' },
+        },
+    ];
+    return $rest_resources;
+}
+
+1;