Translate wrong cyrillic to latin and backwards

src/helpers/cleanSearchText.ts

@@ -11,29 +11,69 @@
 
 import LatinizeMap from "../config/latinizeMap";
 
-const badCharsRe = /[`~!@#$%^&*()\-_=+\[\]\\|{}'";:\/?.>,<]+/g;
+export const badCharsRe = /[`~!@#$%^&*()\-_=+\[\]\\|{}'";:\/?.>,<]+/g;
 const trimRe = /^\s+|\s$/g;
 
+const C2L: {[k: string]: string} = {
+  й: 'q',
+  ц: 'w',
+  у: 'e',
+  к: 'r',
+  е: 't',
+  н: 'y',
+  г: 'u',
+  ш: 'i',
+  щ: 'o',
+  з: 'p',
+  х: '[',
+  ъ: ']',
+  ф: 'a',
+  ы: 's',
+  в: 'd',
+  а: 'f',
+  п: 'g',
+  р: 'h',
+  о: 'j',
+  л: 'k',
+  д: 'l',
+  ж: ';',
+  э: '\'',
+  я: 'z',
+  ч: 'x',
+  с: 'c',
+  м: 'v',
+  и: 'b',
+  т: 'n',
+  ь: 'm',
+  б: ',',
+  ю: '.',
+  '.': '/'
+};
+
 export function clearBadCharsAndTrim(text: string) {
   return text.replace(badCharsRe, '').replace(trimRe, '');
 }
 
+export function fixCyrillic(text: string) {
+  return text.toLowerCase().replace(/[\wа-я]/g, (ch) => {
+    const latinizeCh = C2L[ch];
+    return latinizeCh ?? ch;
+  });
+}
+
 export function latinizeString(text: string) {
   return text.replace(/[^A-Za-z0-9]/g, (ch) => {
     const latinizeCh = LatinizeMap[ch];
-    return latinizeCh !== undefined ? latinizeCh : ch;
+    return latinizeCh ?? ch;
   });
 }
 
 export default function cleanSearchText(text: string, latinize = true) {
-  const hasTag = text.charAt(0) === '%';
-  text = clearBadCharsAndTrim(text);
-  if(latinize) text = latinizeString(text);
-  
-  text = text.toLowerCase();
-  if(hasTag) text = '%' + text;
-
-  return text;
+  return processSearchText(text, {
+    clearBadChars: true,
+    latinize,
+    ignoreCase: true
+  });
 }
 
 export type ProcessSearchTextOptions = Partial<{
@@ -45,9 +85,11 @@ export type ProcessSearchTextOptions = Partial<{
 
 export function processSearchText(text: string, options: ProcessSearchTextOptions = {}) {
   const hasTag = options.includeTag && text.charAt(0) === '%';
+  const originalText = text;
   if(options.clearBadChars) text = clearBadCharsAndTrim(text);
   if(options.latinize) text = latinizeString(text);
   if(options.ignoreCase) text = text.toLowerCase();
   if(hasTag) text = '%' + text;
+  if(options.latinize) text += '\x01' + fixCyrillic(originalText);
   return text;
 }

src/lib/searchIndex.ts

@@ -10,6 +10,7 @@
  */
 
 import { processSearchText, ProcessSearchTextOptions } from '../helpers/cleanSearchText';
+import flatten from '../helpers/array/flatten';
 
 export default class SearchIndex<SearchWhat> {
   private fullTexts: Map<SearchWhat, string> = new Map();
@@ -49,15 +50,9 @@ export default class SearchIndex<SearchWhat> {
     }); */
   }
 
-  public search(query: string) {
-    const fullTexts = this.fullTexts;
-    //const shortIndexes = searchIndex.shortIndexes;
-
-    if(this.options) {
-      query = processSearchText(query, this.options);
-    }
-
+  private _search(query: string) {
     const newFoundObjs: Array<{fullText: string, fullTextLength: number, what: SearchWhat, foundChars: number}> = [];
+    const fullTexts = this.fullTexts;
     const queryWords = query.split(' ');
     const queryWordsLength = queryWords.length;
     fullTexts.forEach((fullText, what) => {
@@ -66,7 +61,7 @@ export default class SearchIndex<SearchWhat> {
       for(let i = 0; i < queryWordsLength; ++i) { // * verify that all words are found
         const word = queryWords[i];
         const idx = fullText.indexOf(word);
-        if(idx === -1 || (idx !== 0 && fullText[idx - 1] !== ' ')) { // * search only from word beginning
+        if(idx === -1 || (idx !== 0 && fullText[idx - 1] !== ' '/*  && !badCharsRe.test(fullText[idx - 1]) */)) { // * search only from word beginning
           found = false;
           break;
         }
@@ -83,40 +78,22 @@ export default class SearchIndex<SearchWhat> {
       }
     });
 
+    return newFoundObjs;
+  }
+
+  public search(query: string) {
+    if(this.options) {
+      query = processSearchText(query, this.options);
+    }
+
+    const queries = query.split('\x01');
+    const newFoundObjs = flatten(queries.map(query => this._search(query)));
+
     newFoundObjs.sort((a, b) => a.fullTextLength - b.fullTextLength || b.foundChars - a.foundChars);
 
     //newFoundObjs.sort((a, b) => a.fullText.localeCompare(b.fullText));
     const newFoundObjs2: Set<SearchWhat> = new Set(newFoundObjs.map(o => o.what));
 
-    /* const queryWords = query.split(' ');
-    let foundArr: number[];
-    for(let i = 0; i < queryWords.length; i++) {
-      const newFound = shortIndexes[queryWords[i].substr(0, 3)];
-      if(!newFound) {
-        foundArr = [];
-        break;
-      }
-      
-      if(foundArr === undefined || foundArr.length > newFound.length) {
-        foundArr = newFound;
-      }
-    }
-
-    for(let j = 0; j < foundArr.length; j++) {
-      let found = true;
-      let searchText = fullTexts[foundArr[j]];
-      for(let i = 0; i < queryWords.length; i++) {
-        if(searchText.indexOf(queryWords[i]) === -1) {
-          found = false;
-          break;
-        }
-      }
-
-      if(found) {
-        newFoundObjs[foundArr[j]] = true;
-      }
-    } */
-
     return newFoundObjs2;
   }
 }