simplify pass 3

query/autocomplete.js

@@ -6,47 +6,10 @@ var peliasQuery = require('pelias-query'),
 
 // additional views (these may be merged in to pelias/query at a later date)
 var views = {
-  ngrams_strict:          require('./view/ngrams_strict'),
-  focus_selected_layers:  require('./view/focus_selected_layers')
-};
-
-var ngrams_last_only = function( vs ){
-
-  // hack to disable ngrams when query parsing enabled
-  if( vs.var('parsed_text').get() ){
-    return null;
-  }
-
-  var name = vs.var('input:name').get();
-
-  var vs2 = new peliasQuery.Vars( vs.export() );
-  vs2.var('input:name').set( name.substr( name.lastIndexOf(' ')+1 ) );
-
-  var view = views.ngrams_strict( vs2 );
-  view.match['name.default'].analyzer = 'peliasPhrase';
-
-  return view;
-};
-
-var phrase_first_only = function( vs ){
-
-  // hack to disable substr when query parsing enabled
-  if( !vs.var('parsed_text').get() ){
-
-    var name = vs.var('input:name').get();
-    var s = name.split(' ');
-
-    // single token only, abort
-    if( s.length < 2 ){
-      return null;
-    }
-
-    var vs2 = new peliasQuery.Vars( vs.export() );
-    vs2.var('input:name').set( name.substr(0, name.lastIndexOf(' ') ) );
-    return peliasQuery.view.phrase( vs2 );
-  }
-
-  return peliasQuery.view.phrase( vs );
+  ngrams_strict:              require('./view/ngrams_strict'),
+  focus_selected_layers:      require('./view/focus_selected_layers'),
+  ngrams_last_token_only:     require('./view/ngrams_last_token_only'),
+  phrase_first_tokens_only:   require('./view/phrase_first_tokens_only')
 };
 
 //------------------------------
@@ -55,8 +18,8 @@ var phrase_first_only = function( vs ){
 var query = new peliasQuery.layout.FilteredBooleanQuery();
 
 // mandatory matches
-query.score( phrase_first_only, 'must' );
-query.score( ngrams_last_only, 'must' );
+query.score( views.phrase_first_tokens_only, 'must' );
+query.score( views.ngrams_last_token_only, 'must' );
 
 // address components
 query.score( peliasQuery.view.address('housenumber') );
@@ -87,16 +50,26 @@ query.score( peliasQuery.view.population( views.ngrams_strict ) );
 function generateQuery( clean ){
 
   var vs = new peliasQuery.Vars( defaults );
-  vs.var( 'parsed_text', false );
 
-  // remove single grams at end
+  // mark the name as incomplete (user has not yet typed a comma)
+  vs.var( 'input:name:isComplete', false );
+
+  // perform some operations on 'clean.text':
+  // 1. if there is a space followed by a single char, remove them.
+  //  - this is required as the index uses 2grams and sending 1grams
+  //  - to a 2gram index when using 'type:phrase' or 'operator:and' will
+  //  - result in a complete failure of the query.
+  // 2. trim leading and trailing whitespace.
   var text = clean.text.replace(/( .$)/g,'').trim();
 
-  if( clean.hasOwnProperty('parsed_text') ){
-    if( clean.parsed_text.hasOwnProperty('name') ){
-      vs.var( 'parsed_text', true );
-      text = clean.parsed_text.name;
-    }
+  // if the input parser has run and suggested a 'parsed_text.name' to use.
+  if( clean.hasOwnProperty('parsed_text') && clean.parsed_text.hasOwnProperty('name') ){
+
+    // mark the name as complete (user has already typed a comma)
+    vs.var( 'input:name:isComplete', true );
+
+    // use 'parsed_text.name' instead of 'clean.text'.
+    text = clean.parsed_text.name;
   }
 
   // input text

query/view/ngrams_last_token_only.js

@@ -0,0 +1,37 @@
+
+var peliasQuery = require('pelias-query'),
+    ngrams_strict = require('./ngrams_strict');
+
+/**
+  Ngrams view which trims the 'input:name' and only uses the LAST TOKEN.
+
+  eg. if the input was "100 foo str", then 'input:name' would only be 'str'
+  note: it is assumed that the rest of the input is matched using another view.
+
+  there is an additional flag 'input:name:isComplete' used to disable this view
+  selectively, see that section for more info.
+
+  code notes: this view makes a copy of the $vs object in order to change their
+  values without mutating the original values, which may be expected in their
+  unaltered form by other views.
+**/
+
+module.exports = function( vs ){
+
+  // Totally disable this view when bool value 'input:name:isComplete' is true.
+  // This is the case when the user has typed a comma, so we can assume
+  // that the 'name' part of the query is now complete.
+  if( vs.var('input:name:isComplete').get() ){ return null; }
+
+  // make a copy Vars so we don't mutate the original
+  var vsCopy = new peliasQuery.Vars( vs.export() );
+
+  // get the input 'name' variable
+  var name = vs.var('input:name').get();
+
+  // set the 'name' variable in the copy to only the last token
+  vsCopy.var('input:name').set( name.substr( name.lastIndexOf(' ')+1 ) );
+
+  // return the view rendered using the copy
+  return ngrams_strict( vsCopy );
+};

query/view/phrase_first_tokens_only.js

@@ -0,0 +1,44 @@
+
+var peliasQuery = require('pelias-query');
+
+/**
+  Phrase view which trims the 'input:name' and uses ALL BUT the last token.
+
+  eg. if the input was "100 foo str", then 'input:name' would only be '100 foo'
+  note: it is assumed that the rest of the input is matched using another view.
+
+  there is an additional flag 'input:name:isComplete' used to disable this view
+  selectively, see that section for more info.
+
+  code notes: this view makes a copy of the $vs object in order to change their
+  values without mutating the original values, which may be expected in their
+  unaltered form by other views.
+**/
+
+module.exports = function( vs ){
+
+  // Don't mutate the name variable when 'input:name:isComplete' is true.
+  // This is the case when the user has typed a comma, so we can assume
+  // that the 'name' part of the query is now complete.
+  if( vs.var('input:name:isComplete').get() ){
+    // return the view rendered using the original vars
+    return peliasQuery.view.phrase( vs );
+  }
+
+  // make a copy Vars so we don't mutate the original
+  var vsCopy = new peliasQuery.Vars( vs.export() );
+
+  // get the input 'name' variable and split in to tokens
+  var name = vs.var('input:name').get(),
+      tokens = name.split(' ');
+
+  // single token only, abort (we don't want the *last* token)
+  // return null here will completely disable the view.
+  if( tokens.length < 2 ){ return null; }
+
+  // set the 'name' variable in the copy to all but the last token
+  vsCopy.var('input:name').set( name.substr( 0, name.lastIndexOf(' ') ) );
+
+  // return the view rendered using the copy
+  return peliasQuery.view.phrase( vsCopy );
+};