[Generic] unaccent search

- added unaccent search on POS customer/partner and product
- moved unaccent from "mail.utils" to "web.utils"
- added more character to make function accurate

We might use str.normalize(from ES6) but the problem is str.normalize method can not consider some double characters i.e. accented character when normalized it returns 2 normal characters and normalize method returns single character, so here custom unaccent method is used to normalize the string

What we can improve here: We can use str.normalize method and check if string is still have unaccented charaters that we can call our unaccent method but this unaccent method is also working and performing well

closes odoo/odoo#27671

6 files changed, 229 insertions, 31 deletions

diff --git a/addons/mail/static/src/js/composers/basic_composer.js b/addons/mail/static/src/js/composers/basic_composer.js
index 09c521ad795..03ffd1c7a30 100644
--- a/addons/mail/static/src/js/composers/basic_composer.js
+++ b/addons/mail/static/src/js/composers/basic_composer.js
@@ -4,7 +4,7 @@ odoo.define('mail.composer.Basic', function (require) {
 var emojis = require('mail.emojis');
 var MentionManager = require('mail.composer.MentionManager');
 var DocumentViewer = require('mail.DocumentViewer');
-var mailUtils = require('mail.utils');
+var utils = require('web.utils');
 
 var config = require('web.config');
 var core = require('web.core');
@@ -306,7 +306,7 @@ var BasicComposer = Widget.extend({
         clearTimeout(this._cannedTimeout);
         this._cannedTimeout = setTimeout(function () {
             var cannedResponses = self.call('mail_service', 'getCannedResponses');
-            var matches = fuzzy.filter(mailUtils.unaccent(search), _.pluck(cannedResponses, 'source'));
+            var matches = fuzzy.filter(utils.unaccent(search), _.pluck(cannedResponses, 'source'));
             var indexes = _.pluck(matches.slice(0, self.options.mentionFetchLimit), 'index');
             def.resolve(_.map(indexes, function (index) {
                 return cannedResponses[index];
@@ -320,7 +320,7 @@ var BasicComposer = Widget.extend({
      * @returns {Array}
      */
     _mentionGetCommands: function (search) {
-        var searchRegexp = new RegExp(_.str.escapeRegExp(mailUtils.unaccent(search)), 'i');
+        var searchRegexp = new RegExp(_.str.escapeRegExp(utils.unaccent(search)), 'i');
         return _.filter(this._mentionCommands, function (command) {
             return searchRegexp.test(command.name);
         }).slice(0, this.options.mentionFetchLimit);
@@ -349,12 +349,12 @@ var BasicComposer = Widget.extend({
             // filter prefetched partners with the given search string
             var suggestions = [];
             var limit = self.options.mentionFetchLimit;
-            var searchRegexp = new RegExp(_.str.escapeRegExp(mailUtils.unaccent(search)), 'i');
+            var searchRegexp = new RegExp(_.str.escapeRegExp(utils.unaccent(search)), 'i');
             _.each(prefetchedPartners, function (partners) {
                 if (limit > 0) {
                     var filteredPartners = _.filter(partners, function (partner) {
                         return partner.email && searchRegexp.test(partner.email) ||
-                            partner.name && searchRegexp.test(mailUtils.unaccent(partner.name));
+                            partner.name && searchRegexp.test(utils.unaccent(partner.name));
                     });
                     if (filteredPartners.length) {
                         suggestions.push(filteredPartners.slice(0, limit));
diff --git a/addons/mail/static/src/js/services/mail_manager.js b/addons/mail/static/src/js/services/mail_manager.js
index 062b3208066..777df1df4a6 100644
--- a/addons/mail/static/src/js/services/mail_manager.js
+++ b/addons/mail/static/src/js/services/mail_manager.js
@@ -33,6 +33,7 @@ var MailFailure = require('mail.model.MailFailure');
 var Message = require('mail.model.Message');
 var MultiUserChannel = require('mail.model.MultiUserChannel');
 var mailUtils = require('mail.utils');
+var utils = require('web.utils');
 
 var Bus = require('web.Bus');
 var config = require('web.config');
@@ -1094,7 +1095,7 @@ var MailManager =  AbstractService.extend({
      */
     _searchPartnerPrefetch: function (searchVal, limit) {
         var values = [];
-        var searchRegexp = new RegExp(_.str.escapeRegExp(mailUtils.unaccent(searchVal)), 'i');
+        var searchRegexp = new RegExp(_.str.escapeRegExp(utils.unaccent(searchVal)), 'i');
         _.each(this._mentionPartnerSuggestions, function (partners) {
             if (values.length < limit) {
                 values = values.concat(_.filter(partners, function (partner) {
diff --git a/addons/mail/static/src/js/utils.js b/addons/mail/static/src/js/utils.js
index 4749ba11b20..cc18df64b18 100644
--- a/addons/mail/static/src/js/utils.js
+++ b/addons/mail/static/src/js/utils.js
@@ -84,25 +84,6 @@ function getTextToHTML(text) {
         .replace(/[\n\r]/g,'<br/>');
 }
 
-var accentedLettersMapping = {
-    'a': '[àáâãäå]',
-    'ae': 'æ',
-    'c': 'ç',
-    'e': '[èéêë]',
-    'i': '[ìíîï]',
-    'n': 'ñ',
-    'o': '[òóôõö]',
-    'oe': 'œ',
-    'u': '[ùúûűü]',
-    'y': '[ýÿ]',
-};
-function unaccent(str) {
-    _.each(accentedLettersMapping, function (value, key) {
-        str = str.replace(new RegExp(value, 'g'), key);
-    });
-    return str;
-}
-
 function timeFromNow(date) {
     if (moment().diff(date, 'seconds') < 45) {
         return _t("now");
@@ -119,7 +100,6 @@ return {
     parseEmail: parseEmail,
     stripHTML: stripHTML,
     timeFromNow: timeFromNow,
-    unaccent: unaccent,
 };
 
 });
diff --git a/addons/point_of_sale/static/src/js/db.js b/addons/point_of_sale/static/src/js/db.js
index ed08d62a17f..b03f4db2649 100644
--- a/addons/point_of_sale/static/src/js/db.js
+++ b/addons/point_of_sale/static/src/js/db.js
@@ -2,6 +2,7 @@ odoo.define('point_of_sale.DB', function (require) {
 "use strict";
 
 var core = require('web.core');
+var utils = require('web.utils');
 /* The PosDB holds reference to data that is either
  * - static: does not change between pos reloads
  * - persistent : must stay between reloads ( orders )
@@ -306,13 +307,13 @@ var PosDB = core.Class.extend({
         try {
             query = query.replace(/[\[\]\(\)\+\*\?\.\-\!\&\^\$\|\~\_\{\}\:\,\\\/]/g,'.');
             query = query.replace(/ /g,'.+');
-            var re = RegExp("([0-9]+):.*?"+query,"gi");
+            var re = RegExp("([0-9]+):.*?"+utils.unaccent(query),"gi");
         }catch(e){
             return [];
         }
         var results = [];
         for(var i = 0; i < this.limit; i++){
-            var r = re.exec(this.partner_search_string);
+            var r = re.exec(utils.unaccent(this.partner_search_string));
             if(r){
                 var id = Number(r[1]);
                 results.push(this.get_partner_by_id(id));
@@ -366,13 +367,13 @@ var PosDB = core.Class.extend({
         try {
             query = query.replace(/[\[\]\(\)\+\*\?\.\-\!\&\^\$\|\~\_\{\}\:\,\\\/]/g,'.');
             query = query.replace(/ /g,'.+');
-            var re = RegExp("([0-9]+):.*?"+query,"gi");
+            var re = RegExp("([0-9]+):.*?"+utils.unaccent(query),"gi");
         }catch(e){
             return [];
         }
         var results = [];
         for(var i = 0; i < this.limit; i++){
-            var r = re.exec(this.category_search_string[category_id]);
+            var r = re.exec(utils.unaccent(this.category_search_string[category_id]));
             if(r){
                 var id = Number(r[1]);
                 results.push(this.get_product_by_id(id));
diff --git a/addons/web/static/src/js/core/utils.js b/addons/web/static/src/js/core/utils.js
index 5d707d951bb..aff38309d93 100644
--- a/addons/web/static/src/js/core/utils.js
+++ b/addons/web/static/src/js/core/utils.js
@@ -12,6 +12,197 @@ var translation = require('web.translation');
 var _t = translation._t;
 var id = -1;
 
+var diacriticsMap = {
+'\u0041': 'A','\u24B6': 'A','\uFF21': 'A','\u00C0': 'A','\u00C1': 'A','\u00C2': 'A','\u1EA6': 'A','\u1EA4': 'A','\u1EAA': 'A','\u1EA8': 'A',
+'\u00C3': 'A','\u0100': 'A','\u0102': 'A','\u1EB0': 'A','\u1EAE': 'A','\u1EB4': 'A','\u1EB2': 'A','\u0226': 'A','\u01E0': 'A','\u00C4': 'A',
+'\u01DE': 'A','\u1EA2': 'A','\u00C5': 'A','\u01FA': 'A','\u01CD': 'A','\u0200': 'A','\u0202': 'A','\u1EA0': 'A','\u1EAC': 'A','\u1EB6': 'A',
+'\u1E00': 'A','\u0104': 'A','\u023A': 'A','\u2C6F': 'A',
+
+'\uA732': 'AA',
+'\u00C6': 'AE','\u01FC': 'AE','\u01E2': 'AE',
+'\uA734': 'AO',
+'\uA736': 'AU',
+'\uA738': 'AV','\uA73A': 'AV',
+'\uA73C': 'AY',
+'\u0042': 'B','\u24B7': 'B','\uFF22': 'B','\u1E02': 'B','\u1E04': 'B','\u1E06': 'B','\u0243': 'B','\u0182': 'B','\u0181': 'B',
+
+'\u0043': 'C','\u24B8': 'C','\uFF23': 'C','\u0106': 'C','\u0108': 'C','\u010A': 'C','\u010C': 'C','\u00C7': 'C','\u1E08': 'C','\u0187': 'C',
+'\u023B': 'C','\uA73E': 'C',
+
+'\u0044': 'D','\u24B9': 'D','\uFF24': 'D','\u1E0A': 'D','\u010E': 'D','\u1E0C': 'D','\u1E10': 'D','\u1E12': 'D','\u1E0E': 'D','\u0110': 'D',
+'\u018B': 'D','\u018A': 'D','\u0189': 'D','\uA779': 'D',
+
+'\u01F1': 'DZ','\u01C4': 'DZ',
+'\u01F2': 'Dz','\u01C5': 'Dz',
+
+'\u0045': 'E','\u24BA': 'E','\uFF25': 'E','\u00C8': 'E','\u00C9': 'E','\u00CA': 'E','\u1EC0': 'E','\u1EBE': 'E','\u1EC4': 'E','\u1EC2': 'E',
+'\u1EBC': 'E','\u0112': 'E','\u1E14': 'E','\u1E16': 'E','\u0114': 'E','\u0116': 'E','\u00CB': 'E','\u1EBA': 'E','\u011A': 'E','\u0204': 'E',
+'\u0206': 'E','\u1EB8': 'E','\u1EC6': 'E','\u0228': 'E','\u1E1C': 'E','\u0118': 'E','\u1E18': 'E','\u1E1A': 'E','\u0190': 'E','\u018E': 'E',
+
+'\u0046': 'F','\u24BB': 'F','\uFF26': 'F','\u1E1E': 'F','\u0191': 'F','\uA77B': 'F',
+
+'\u0047': 'G','\u24BC': 'G','\uFF27': 'G','\u01F4': 'G','\u011C': 'G','\u1E20': 'G','\u011E': 'G','\u0120': 'G','\u01E6': 'G','\u0122': 'G',
+'\u01E4': 'G','\u0193': 'G','\uA7A0': 'G','\uA77D': 'G','\uA77E': 'G',
+
+'\u0048': 'H','\u24BD': 'H','\uFF28': 'H','\u0124': 'H','\u1E22': 'H','\u1E26': 'H','\u021E': 'H','\u1E24': 'H','\u1E28': 'H','\u1E2A': 'H',
+'\u0126': 'H','\u2C67': 'H','\u2C75': 'H','\uA78D': 'H',
+
+'\u0049': 'I','\u24BE': 'I','\uFF29': 'I','\u00CC': 'I','\u00CD': 'I','\u00CE': 'I','\u0128': 'I','\u012A': 'I','\u012C': 'I','\u0130': 'I',
+'\u00CF': 'I','\u1E2E': 'I','\u1EC8': 'I','\u01CF': 'I','\u0208': 'I','\u020A': 'I','\u1ECA': 'I','\u012E': 'I','\u1E2C': 'I','\u0197': 'I',
+
+'\u004A': 'J','\u24BF': 'J','\uFF2A': 'J','\u0134': 'J','\u0248': 'J',
+
+'\u004B': 'K','\u24C0': 'K','\uFF2B': 'K','\u1E30': 'K','\u01E8': 'K','\u1E32': 'K','\u0136': 'K','\u1E34': 'K','\u0198': 'K','\u2C69': 'K',
+'\uA740': 'K','\uA742': 'K','\uA744': 'K','\uA7A2': 'K',
+
+'\u004C': 'L','\u24C1': 'L','\uFF2C': 'L','\u013F': 'L','\u0139': 'L','\u013D': 'L','\u1E36': 'L','\u1E38': 'L','\u013B': 'L','\u1E3C': 'L',
+'\u1E3A': 'L','\u0141': 'L','\u023D': 'L','\u2C62': 'L','\u2C60': 'L','\uA748': 'L','\uA746': 'L','\uA780': 'L',
+
+'\u01C7': 'LJ',
+'\u01C8': 'Lj',
+'\u004D': 'M','\u24C2': 'M','\uFF2D': 'M','\u1E3E': 'M','\u1E40': 'M','\u1E42': 'M','\u2C6E': 'M','\u019C': 'M',
+
+'\u004E': 'N','\u24C3': 'N','\uFF2E': 'N','\u01F8': 'N','\u0143': 'N','\u00D1': 'N','\u1E44': 'N','\u0147': 'N','\u1E46': 'N','\u0145': 'N',
+'\u1E4A': 'N','\u1E48': 'N','\u0220': 'N','\u019D': 'N','\uA790': 'N','\uA7A4': 'N',
+
+'\u01CA': 'NJ',
+'\u01CB': 'Nj',
+
+'\u004F': 'O','\u24C4': 'O','\uFF2F': 'O','\u00D2': 'O','\u00D3': 'O','\u00D4': 'O','\u1ED2': 'O','\u1ED0': 'O','\u1ED6': 'O','\u1ED4': 'O',
+'\u00D5': 'O','\u1E4C': 'O','\u022C': 'O','\u1E4E': 'O','\u014C': 'O','\u1E50': 'O','\u1E52': 'O','\u014E': 'O','\u022E': 'O','\u0230': 'O',
+'\u00D6': 'O','\u022A': 'O','\u1ECE': 'O','\u0150': 'O','\u01D1': 'O','\u020C': 'O','\u020E': 'O','\u01A0': 'O','\u1EDC': 'O','\u1EDA': 'O',
+'\u1EE0': 'O','\u1EDE': 'O','\u1EE2': 'O','\u1ECC': 'O','\u1ED8': 'O','\u01EA': 'O','\u01EC': 'O','\u00D8': 'O','\u01FE': 'O','\u0186': 'O',
+'\u019F': 'O','\uA74A': 'O','\uA74C': 'O',
+
+'\u01A2': 'OI',
+'\uA74E': 'OO',
+'\u0222': 'OU',
+'\u0050': 'P','\u24C5': 'P','\uFF30': 'P','\u1E54': 'P','\u1E56': 'P','\u01A4': 'P','\u2C63': 'P','\uA750': 'P','\uA752': 'P','\uA754': 'P',
+'\u0051': 'Q','\u24C6': 'Q','\uFF31': 'Q','\uA756': 'Q','\uA758': 'Q','\u024A': 'Q',
+
+'\u0052': 'R','\u24C7': 'R','\uFF32': 'R','\u0154': 'R','\u1E58': 'R','\u0158': 'R','\u0210': 'R','\u0212': 'R','\u1E5A': 'R','\u1E5C': 'R',
+'\u0156': 'R','\u1E5E': 'R','\u024C': 'R','\u2C64': 'R','\uA75A': 'R','\uA7A6': 'R','\uA782': 'R',
+
+'\u0053': 'S','\u24C8': 'S','\uFF33': 'S','\u1E9E': 'S','\u015A': 'S','\u1E64': 'S','\u015C': 'S','\u1E60': 'S','\u0160': 'S','\u1E66': 'S',
+'\u1E62': 'S','\u1E68': 'S','\u0218': 'S','\u015E': 'S','\u2C7E': 'S','\uA7A8': 'S','\uA784': 'S',
+
+'\u0054': 'T','\u24C9': 'T','\uFF34': 'T','\u1E6A': 'T','\u0164': 'T','\u1E6C': 'T','\u021A': 'T','\u0162': 'T','\u1E70': 'T','\u1E6E': 'T',
+'\u0166': 'T','\u01AC': 'T','\u01AE': 'T','\u023E': 'T','\uA786': 'T',
+
+'\uA728': 'TZ',
+
+'\u0055': 'U','\u24CA': 'U','\uFF35': 'U','\u00D9': 'U','\u00DA': 'U','\u00DB': 'U','\u0168': 'U','\u1E78': 'U','\u016A': 'U','\u1E7A': 'U',
+'\u016C': 'U','\u00DC': 'U','\u01DB': 'U','\u01D7': 'U','\u01D5': 'U','\u01D9': 'U','\u1EE6': 'U','\u016E': 'U','\u0170': 'U','\u01D3': 'U',
+'\u0214': 'U','\u0216': 'U','\u01AF': 'U','\u1EEA': 'U','\u1EE8': 'U','\u1EEE': 'U','\u1EEC': 'U','\u1EF0': 'U','\u1EE4': 'U','\u1E72': 'U',
+'\u0172': 'U','\u1E76': 'U','\u1E74': 'U','\u0244': 'U',
+
+'\u0056': 'V','\u24CB': 'V','\uFF36': 'V','\u1E7C': 'V','\u1E7E': 'V','\u01B2': 'V','\uA75E': 'V','\u0245': 'V',
+'\uA760': 'VY',
+'\u0057': 'W','\u24CC': 'W','\uFF37': 'W','\u1E80': 'W','\u1E82': 'W','\u0174': 'W','\u1E86': 'W','\u1E84': 'W','\u1E88': 'W','\u2C72': 'W',
+'\u0058': 'X','\u24CD': 'X','\uFF38': 'X','\u1E8A': 'X','\u1E8C': 'X',
+
+'\u0059': 'Y','\u24CE': 'Y','\uFF39': 'Y','\u1EF2': 'Y','\u00DD': 'Y','\u0176': 'Y','\u1EF8': 'Y','\u0232': 'Y','\u1E8E': 'Y','\u0178': 'Y',
+'\u1EF6': 'Y','\u1EF4': 'Y','\u01B3': 'Y','\u024E': 'Y','\u1EFE': 'Y',
+
+'\u005A': 'Z','\u24CF': 'Z','\uFF3A': 'Z','\u0179': 'Z','\u1E90': 'Z','\u017B': 'Z','\u017D': 'Z','\u1E92': 'Z','\u1E94': 'Z','\u01B5': 'Z',
+'\u0224': 'Z','\u2C7F': 'Z','\u2C6B': 'Z','\uA762': 'Z',
+
+'\u0061': 'a','\u24D0': 'a','\uFF41': 'a','\u1E9A': 'a','\u00E0': 'a','\u00E1': 'a','\u00E2': 'a','\u1EA7': 'a','\u1EA5': 'a','\u1EAB': 'a',
+'\u1EA9': 'a','\u00E3': 'a','\u0101': 'a','\u0103': 'a','\u1EB1': 'a','\u1EAF': 'a','\u1EB5': 'a','\u1EB3': 'a','\u0227': 'a','\u01E1': 'a',
+'\u00E4': 'a','\u01DF': 'a','\u1EA3': 'a','\u00E5': 'a','\u01FB': 'a','\u01CE': 'a','\u0201': 'a','\u0203': 'a','\u1EA1': 'a','\u1EAD': 'a',
+'\u1EB7': 'a','\u1E01': 'a','\u0105': 'a','\u2C65': 'a','\u0250': 'a',
+
+'\uA733': 'aa',
+'\u00E6': 'ae','\u01FD': 'ae','\u01E3': 'ae',
+'\uA735': 'ao',
+'\uA737': 'au',
+'\uA739': 'av','\uA73B': 'av',
+'\uA73D': 'ay',
+'\u0062': 'b','\u24D1': 'b','\uFF42': 'b','\u1E03': 'b','\u1E05': 'b','\u1E07': 'b','\u0180': 'b','\u0183': 'b','\u0253': 'b',
+
+'\u0063': 'c','\u24D2': 'c','\uFF43': 'c','\u0107': 'c','\u0109': 'c','\u010B': 'c','\u010D': 'c','\u00E7': 'c','\u1E09': 'c','\u0188': 'c',
+'\u023C': 'c','\uA73F': 'c','\u2184': 'c',
+
+'\u0064': 'd','\u24D3': 'd','\uFF44': 'd','\u1E0B': 'd','\u010F': 'd','\u1E0D': 'd','\u1E11': 'd','\u1E13': 'd','\u1E0F': 'd','\u0111': 'd',
+'\u018C': 'd','\u0256': 'd','\u0257': 'd','\uA77A': 'd',
+
+'\u01F3': 'dz','\u01C6': 'dz',
+
+'\u0065': 'e','\u24D4': 'e','\uFF45': 'e','\u00E8': 'e','\u00E9': 'e','\u00EA': 'e','\u1EC1': 'e','\u1EBF': 'e','\u1EC5': 'e','\u1EC3': 'e',
+'\u1EBD': 'e','\u0113': 'e','\u1E15': 'e','\u1E17': 'e','\u0115': 'e','\u0117': 'e','\u00EB': 'e','\u1EBB': 'e','\u011B': 'e','\u0205': 'e',
+'\u0207': 'e','\u1EB9': 'e','\u1EC7': 'e','\u0229': 'e','\u1E1D': 'e','\u0119': 'e','\u1E19': 'e','\u1E1B': 'e','\u0247': 'e','\u025B': 'e',
+'\u01DD': 'e',
+
+'\u0066': 'f','\u24D5': 'f','\uFF46': 'f','\u1E1F': 'f','\u0192': 'f','\uA77C': 'f',
+
+'\u0067': 'g','\u24D6': 'g','\uFF47': 'g','\u01F5': 'g','\u011D': 'g','\u1E21': 'g','\u011F': 'g','\u0121': 'g','\u01E7': 'g','\u0123': 'g',
+'\u01E5': 'g','\u0260': 'g','\uA7A1': 'g','\u1D79': 'g','\uA77F': 'g',
+
+'\u0068': 'h','\u24D7': 'h','\uFF48': 'h','\u0125': 'h','\u1E23': 'h','\u1E27': 'h','\u021F': 'h','\u1E25': 'h','\u1E29': 'h','\u1E2B': 'h',
+'\u1E96': 'h','\u0127': 'h','\u2C68': 'h','\u2C76': 'h','\u0265': 'h',
+
+'\u0195': 'hv',
+
+'\u0069': 'i','\u24D8': 'i','\uFF49': 'i','\u00EC': 'i','\u00ED': 'i','\u00EE': 'i','\u0129': 'i','\u012B': 'i','\u012D': 'i','\u00EF': 'i',
+'\u1E2F': 'i','\u1EC9': 'i','\u01D0': 'i','\u0209': 'i','\u020B': 'i','\u1ECB': 'i','\u012F': 'i','\u1E2D': 'i','\u0268': 'i','\u0131': 'i',
+
+'\u006A': 'j','\u24D9': 'j','\uFF4A': 'j','\u0135': 'j','\u01F0': 'j','\u0249': 'j',
+
+'\u006B': 'k','\u24DA': 'k','\uFF4B': 'k','\u1E31': 'k','\u01E9': 'k','\u1E33': 'k','\u0137': 'k','\u1E35': 'k','\u0199': 'k','\u2C6A': 'k',
+'\uA741': 'k','\uA743': 'k','\uA745': 'k','\uA7A3': 'k',
+
+'\u006C': 'l','\u24DB': 'l','\uFF4C': 'l','\u0140': 'l','\u013A': 'l','\u013E': 'l','\u1E37': 'l','\u1E39': 'l','\u013C': 'l','\u1E3D': 'l',
+'\u1E3B': 'l','\u017F': 'l','\u0142': 'l','\u019A': 'l','\u026B': 'l','\u2C61': 'l','\uA749': 'l','\uA781': 'l','\uA747': 'l',
+
+'\u01C9': 'lj',
+'\u006D': 'm','\u24DC': 'm','\uFF4D': 'm','\u1E3F': 'm','\u1E41': 'm','\u1E43': 'm','\u0271': 'm','\u026F': 'm',
+
+'\u006E': 'n','\u24DD': 'n','\uFF4E': 'n','\u01F9': 'n','\u0144': 'n','\u00F1': 'n','\u1E45': 'n','\u0148': 'n','\u1E47': 'n','\u0146': 'n',
+'\u1E4B': 'n','\u1E49': 'n','\u019E': 'n','\u0272': 'n','\u0149': 'n','\uA791': 'n','\uA7A5': 'n',
+
+'\u01CC': 'nj',
+
+'\u006F': 'o','\u24DE': 'o','\uFF4F': 'o','\u00F2': 'o','\u00F3': 'o','\u00F4': 'o','\u1ED3': 'o','\u1ED1': 'o','\u1ED7': 'o','\u1ED5': 'o',
+'\u00F5': 'o','\u1E4D': 'o','\u022D': 'o','\u1E4F': 'o','\u014D': 'o','\u1E51': 'o','\u1E53': 'o','\u014F': 'o','\u022F': 'o','\u0231': 'o',
+'\u00F6': 'o','\u022B': 'o','\u1ECF': 'o','\u0151': 'o','\u01D2': 'o','\u020D': 'o','\u020F': 'o','\u01A1': 'o','\u1EDD': 'o','\u1EDB': 'o',
+'\u1EE1': 'o','\u1EDF': 'o','\u1EE3': 'o','\u1ECD': 'o','\u1ED9': 'o','\u01EB': 'o','\u01ED': 'o','\u00F8': 'o','\u01FF': 'o','\u0254': 'o',
+'\uA74B': 'o','\uA74D': 'o','\u0275': 'o',
+
+'\u01A3': 'oi',
+'\u0223': 'ou',
+'\uA74F': 'oo',
+'\u0070': 'p','\u24DF': 'p','\uFF50': 'p','\u1E55': 'p','\u1E57': 'p','\u01A5': 'p','\u1D7D': 'p','\uA751': 'p','\uA753': 'p','\uA755': 'p',
+'\u0071': 'q','\u24E0': 'q','\uFF51': 'q','\u024B': 'q','\uA757': 'q','\uA759': 'q',
+
+'\u0072': 'r','\u24E1': 'r','\uFF52': 'r','\u0155': 'r','\u1E59': 'r','\u0159': 'r','\u0211': 'r','\u0213': 'r','\u1E5B': 'r','\u1E5D': 'r',
+'\u0157': 'r','\u1E5F': 'r','\u024D': 'r','\u027D': 'r','\uA75B': 'r','\uA7A7': 'r','\uA783': 'r',
+
+'\u0073': 's','\u24E2': 's','\uFF53': 's','\u00DF': 's','\u015B': 's','\u1E65': 's','\u015D': 's','\u1E61': 's','\u0161': 's','\u1E67': 's',
+'\u1E63': 's','\u1E69': 's','\u0219': 's','\u015F': 's','\u023F': 's','\uA7A9': 's','\uA785': 's','\u1E9B': 's',
+
+'\u0074': 't','\u24E3': 't','\uFF54': 't','\u1E6B': 't','\u1E97': 't','\u0165': 't','\u1E6D': 't','\u021B': 't','\u0163': 't','\u1E71': 't',
+'\u1E6F': 't','\u0167': 't','\u01AD': 't','\u0288': 't','\u2C66': 't','\uA787': 't',
+
+'\uA729': 'tz',
+
+'\u0075': 'u','\u24E4': 'u','\uFF55': 'u','\u00F9': 'u','\u00FA': 'u','\u00FB': 'u','\u0169': 'u','\u1E79': 'u','\u016B': 'u','\u1E7B': 'u',
+'\u016D': 'u','\u00FC': 'u','\u01DC': 'u','\u01D8': 'u','\u01D6': 'u','\u01DA': 'u','\u1EE7': 'u','\u016F': 'u','\u0171': 'u','\u01D4': 'u',
+'\u0215': 'u','\u0217': 'u','\u01B0': 'u','\u1EEB': 'u','\u1EE9': 'u','\u1EEF': 'u','\u1EED': 'u','\u1EF1': 'u','\u1EE5': 'u','\u1E73': 'u',
+'\u0173': 'u','\u1E77': 'u','\u1E75': 'u','\u0289': 'u',
+
+'\u0076': 'v','\u24E5': 'v','\uFF56': 'v','\u1E7D': 'v','\u1E7F': 'v','\u028B': 'v','\uA75F': 'v','\u028C': 'v',
+'\uA761': 'vy',
+'\u0077': 'w','\u24E6': 'w','\uFF57': 'w','\u1E81': 'w','\u1E83': 'w','\u0175': 'w','\u1E87': 'w','\u1E85': 'w','\u1E98': 'w','\u1E89': 'w',
+'\u2C73': 'w',
+'\u0078': 'x','\u24E7': 'x','\uFF58': 'x','\u1E8B': 'x','\u1E8D': 'x',
+
+'\u0079': 'y','\u24E8': 'y','\uFF59': 'y','\u1EF3': 'y','\u00FD': 'y','\u0177': 'y','\u1EF9': 'y','\u0233': 'y','\u1E8F': 'y','\u00FF': 'y',
+'\u1EF7': 'y','\u1E99': 'y','\u1EF5': 'y','\u01B4': 'y','\u024F': 'y','\u1EFF': 'y',
+
+'\u007A': 'z','\u24E9': 'z','\uFF5A': 'z','\u017A': 'z','\u1E91': 'z','\u017C': 'z','\u017E': 'z','\u1E93': 'z','\u1E95': 'z','\u01B6': 'z',
+'\u0225': 'z','\u0240': 'z','\u2C6C': 'z','\uA763': 'z',
+};
+
 var utils = {
     /**
      * Throws an error if the given condition is not true
@@ -414,6 +605,19 @@ var utils = {
         }
     },
     /**
+     * Replace diacritics character with ASCII character
+     *
+     * @param {string} str diacritics string
+     * @param {boolean} casesensetive
+     * @returns {string} ASCII string
+     */
+    unaccent: function (str, casesensetive=false) {
+        str = str.replace(/[^\u0000-\u007E]/g, function (accented) {
+            return diacriticsMap[accented] || accented;
+        });
+        return casesensetive ? str : str.toLowerCase();
+    },
+    /**
      * @param {any} node
      * @param {any} strip_whitespace
      * @returns
diff --git a/addons/web/static/tests/core/util_tests.js b/addons/web/static/tests/core/util_tests.js
index c7158083dcb..3dd0a54b5e3 100644
--- a/addons/web/static/tests/core/util_tests.js
+++ b/addons/web/static/tests/core/util_tests.js
@@ -55,6 +55,18 @@ QUnit.module('core', {}, function () {
         assert.strictEqual(is_bin_size('64.2 Кб'), true);
     });
 
+    QUnit.test('unaccent', function (assert) {
+        assert.expect(3);
+
+        var singleCharacters = utils.unaccent("ⱮɀꝾƶⱵȥ");
+        var doubledCharacters = utils.unaccent("DZDŽꝎꜩꝡƕ");
+        var caseSensetiveCharacters = utils.unaccent("ⱮɀꝾƶⱵȥ", true);
+
+        assert.strictEqual("mzgzhz", singleCharacters);
+        assert.strictEqual("dzdzootzvyhv", doubledCharacters);
+        assert.strictEqual("MzGzHz", caseSensetiveCharacters);
+    });
+
 });
 
-});
\ No newline at end of file
+});