NestJs Sample RegExp

Search in full text

if (searchCityDto.hasOwnProperty('title')) {
  Object.assign(filter, {
    "title.fa": new RegExp(searchCityDto.title, 'i'),
  });
  cacheKey  += '_'+ searchCityDto.title;
}

Search in start of word

if (searchCityDto.hasOwnProperty('title')) {
  Object.assign(filter, {
    "title.fa": new RegExp('^'+searchCityDto.title, 'i'),
  });
  cacheKey  += '_'+ searchCityDto.title;
}

With redis

/**
 * get all city for one country
 * @param searchStateDto
 */
async cities(searchCityDto: SearchCityDto) {
  let filter  = {};

  Object.assign(filter, { 'topicType': LocationTopicTypeEnum.CITY});

  let cacheKey  = 'search_in_cities';

  if (searchCityDto.hasOwnProperty('countryId')) {
    Object.assign(filter, { 'countryId': searchCityDto.countryId});
    cacheKey  += '_'+ searchCityDto.countryId;
  }

  if (searchCityDto.hasOwnProperty('stateId')) {
    Object.assign(filter, { 'stateId': searchCityDto.stateId});
    cacheKey  += '_'+ searchCityDto.stateId;
  }

  if (searchCityDto.hasOwnProperty('title')) {
    Object.assign(filter, {
      "title.fa": new RegExp('^'+searchCityDto.title, 'i'),
    });
    cacheKey  += '_'+ searchCityDto.title;
  }

  /**
   * get cache
   */
  let  getCache = await this.cacheManager.get(cacheKey);
  if(!getCache){
    /**
     * find Db
     */
    let data = await this.locationModel.find(filter);
    /**
     * set cache for 1 day = 86400 second
     */
    await this.cacheManager.set(cacheKey,[...new Set(data)], {ttl:86400});

    getCache  = data;


  }

  return getCache;
}

4: search on fullName

if (searchUserDto.hasOwnProperty('fullName')) {
  searchUserDto.fullName = this._strReplaceForArabic(searchUserDto.fullName);

  let tempFullName         =  searchUserDto.fullName;
  let fullNameWithOutSpace =  tempFullName.replace( " ", '');

  arrConditionAnd.push(

        {
          "$expr": {
            "$or":[
              {
                "$regexMatch": {
                  "input": {"$concat": ["$firstName", " ", "$lastName"]},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": "$firstName",
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": "$lastName",
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$replaceAll": { input: "$firstName", find: " ", replacement: ""}},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$replaceAll": { input: "$firstName", find: "‌", replacement: ""}},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$replaceAll": { input: "$lastName", find: " ", replacement: ""}},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$replaceAll": { input: "$lastName", find: "‌", replacement: ""}},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": "$firstName",
                  "regex": fullNameWithOutSpace,
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": "$lastName",
                  "regex": fullNameWithOutSpace,
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$concat": ["$firstName", " ", "$lastName"]},
                  "regex": fullNameWithOutSpace,
                  "options": "i"
                }
              },
            ]

          }
        }
  );
}

5: search on fullName (New)

let tempFullName         =  searchUserDto.fullName;
  let fullNameWithOutSpace =  tempFullName.replace( new RegExp(" ", 'g'), '')
      .replace( new RegExp("‌", 'g'), '');

  arrConditionAnd.push(

        {
          "$expr": {
            "$or":[
              {
                "$regexMatch": {
                  "input": {"$concat": ["$firstName", " ", "$lastName"]},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$concat": [{"$replaceAll": { input: "$firstName", find: " ", replacement: ""}}, " ", "$lastName"]},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$concat": [{"$replaceAll": { input: "$firstName", find: "‌", replacement: ""}}, " ", "$lastName"]},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$concat": ["$firstName", " ", {"$replaceAll": { input: "$lastName", find: " ", replacement: ""}}]},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$concat": ["$firstName", " ", {"$replaceAll": { input: "$lastName", find: "‌", replacement: ""}}]},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$concat": [{"$replaceAll": { input: "$firstName", find: " ", replacement: ""}}, " ", {"$replaceAll": { input: "$lastName", find: " ", replacement: ""}}]},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$concat": [{"$replaceAll": { input: "$firstName", find: "‌", replacement: ""}}, " ", {"$replaceAll": { input: "$lastName", find: "‌", replacement: ""}}]},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": "$firstName",
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": "$lastName",
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$replaceAll": { input: "$firstName", find: " ", replacement: ""}},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$replaceAll": { input: "$firstName", find: "‌", replacement: ""}},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$replaceAll": { input: "$lastName", find: " ", replacement: ""}},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$replaceAll": { input: "$lastName", find: "‌", replacement: ""}},
                  "regex": searchUserDto.fullName.toString(),
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": "$firstName",
                  "regex": fullNameWithOutSpace,
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": "$lastName",
                  "regex": fullNameWithOutSpace,
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$concat": ["$firstName", " ", "$lastName"]},
                  "regex": fullNameWithOutSpace,
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$concat": [{"$replaceAll": { input: "$firstName", find: "‌", replacement: ""}}, {"$replaceAll": { input: "$lastName", find: "‌", replacement: ""}}]},
                  "regex": fullNameWithOutSpace,
                  "options": "i"
                }
              },
              {
                "$regexMatch": {
                  "input": {"$concat": [{"$replaceAll": { input: "$firstName", find: " ", replacement: ""}}, {"$replaceAll": { input: "$lastName", find: " ", replacement: ""}}]},
                  "regex": fullNameWithOutSpace,
                  "options": "i"
                }
              },
            ]

          }
        }
  );

}