fix(sanitizer): Trim whitespace in addressit queries

This is a followup PR to https://github.com/pelias/api/pull/1171 and
https://github.com/pelias/api/pull/1170.

Apparently we have two different `text` sanitizers, and autocomplete
queries were treating a single space as valid input. This had a
particularly bad outcome as it would end up generating queries (see an
[example](https://gist.github.com/orangejulius/2cc26c7eed39311b6eaf1fb0175c13e6)) that had no main query clause.

This caused them to match basically every document in the index. Looking
at the geocode.earth slowlog, these queries took **__8 seconds per
shard__**.

sanitizer/_text_addressit.js

@@ -3,6 +3,9 @@ var parser = require('addressit');
 var _      = require('lodash');
 var logger = require('pelias-logger').get('api');
 
+// ref: https://en.wikipedia.org/wiki/Quotation_mark
+const QUOTES = `"'«»‘’‚‛“”„‟‹›⹂「」『』〝〞〟﹁﹂﹃﹄＂＇｢｣`;
+
 // validate texts, convert types and apply defaults
 function _sanitize( raw, clean ){
 
@@ -10,7 +13,8 @@ function _sanitize( raw, clean ){
   var messages = { errors: [], warnings: [] };
 
   // invalid input 'text'
-  if( !check.nonEmptyString( raw.text ) ){
+  const text =  _.trim( _.trim( raw.text ), QUOTES );
+  if( !check.nonEmptyString( text ) ){
     messages.errors.push('invalid param \'text\': text length, must be >0');
   }
 
@@ -18,7 +22,7 @@ function _sanitize( raw, clean ){
   else {
 
     // valid text
-    clean.text = raw.text;
+    clean.text = text;
     clean.parser = 'addressit';
 
     // remove anything that may have been parsed before

test/unit/sanitizer/_text_addressit.js

@@ -339,6 +339,20 @@ module.exports.tests.text_parser = function(test, common) {
 
   });
 
+  test('whitespace-only input counts as empty', (t) => {
+    const raw = { text: ' ' };
+    const clean = {};
+
+    const expected_clean = {};
+
+    const messages = sanitizer.sanitize(raw, clean);
+
+    t.deepEquals(clean, expected_clean);
+    t.deepEquals(messages.errors, ['invalid param \'text\': text length, must be >0']);
+    t.deepEquals(messages.warnings, [], 'no warnings');
+    t.end();
+  });
+
   test('return an array of expected parameters in object form for validation', (t) => {
     const expected = [{ name: 'text' }];
     const validParameters = sanitizer.expected();