pigallery2/backend/model/mysql/SearchManager.ts

import {AutoCompleteItem, SearchTypes} from "../../../common/entities/AutoCompleteItem";
import {ISearchManager} from "../interfaces/ISearchManager";
import {SearchResultDTO} from "../../../common/entities/SearchResult";
import {MySQLConnection} from "./MySQLConnection";
import {PhotoEntity} from "./enitites/PhotoEntity";
import {DirectoryEntity} from "./enitites/DirectoryEntity";
import {PositionMetaData} from "../../../common/entities/PhotoDTO";

export class SearchManager implements ISearchManager {

  isSupported(): boolean {
    return true;
  }

  autocomplete(text: string, cb: (error: any, result: Array<AutoCompleteItem>) => void) {

    MySQLConnection.getConnection().then(async connection => {
      try {
        let result: Array<AutoCompleteItem> = [];
        let photoRepository = connection.getRepository(PhotoEntity);
        let directoryRepository = connection.getRepository(DirectoryEntity);


        (await photoRepository
          .createQueryBuilder('photo')
          .select('DISTINCT(photo.metadataKeywords)')
          .where('photo.metadata.keywords LIKE :text COLLATE utf8_general_ci', {text: "%" + text + "%"})
          .setLimit(5)
          .getRawMany())
          .map(r => <Array<string>>JSON.parse(r.metadataKeywords))
          .forEach(keywords => {
            result = result.concat(this.encapsulateAutoComplete(keywords.filter(k => k.toLowerCase().indexOf(text.toLowerCase()) != -1), SearchTypes.keyword));
          });


        (await photoRepository
          .createQueryBuilder('photo')
          .select('DISTINCT(photo.metadataPositionData)')
          .where('photo.metadata.positionData LIKE :text COLLATE utf8_general_ci', {text: "%" + text + "%"})
          .setLimit(5)
          .getRawMany())
          .map(r => <PositionMetaData>JSON.parse(r.metadataPositionData))
          .map(pm => <Array<string>>[pm.city || "", pm.country || "", pm.state || ""])
          .forEach(positions => {
            result = result.concat(this.encapsulateAutoComplete(positions.filter(p => p.toLowerCase().indexOf(text.toLowerCase()) != -1), SearchTypes.position));
          });


        result = result.concat(this.encapsulateAutoComplete((await photoRepository
          .createQueryBuilder('photo')
          .select('DISTINCT(photo.name)')
          .where('photo.name LIKE :text COLLATE utf8_general_ci', {text: "%" + text + "%"})
          .setLimit(5)
          .getRawMany())
          .map(r => r.name), SearchTypes.image));

        result = result.concat(this.encapsulateAutoComplete((await directoryRepository
          .createQueryBuilder('dir')
          .select('DISTINCT(dir.name)')
          .where('dir.name LIKE :text COLLATE utf8_general_ci', {text: "%" + text + "%"})
          .setLimit(5)
          .getRawMany())
          .map(r => r.name), SearchTypes.directory));


        return cb(null, this.autoCompleteItemsUnique(result));
      } catch (error) {
        return cb(error, null);
      }

    }).catch((error) => {
      return cb(error, null);
    });
  }

  search(text: string, searchType: SearchTypes, cb: (error: any, result: SearchResultDTO) => void) {
    MySQLConnection.getConnection().then(async connection => {

      let result: SearchResultDTO = <SearchResultDTO>{
        searchText: text,
        searchType: searchType,
        directories: [],
        photos: []
      };

      let query = connection
        .getRepository(PhotoEntity)
        .createQueryBuilder("photo");


      if (!searchType || searchType === SearchTypes.image) {
        query.orWhere('photo.name LIKE :text COLLATE utf8_general_ci', {text: "%" + text + "%"});
      }

      if (!searchType || searchType === SearchTypes.position) {
        query.orWhere('photo.metadata.positionData LIKE :text COLLATE utf8_general_ci', {text: "%" + text + "%"});
      }
      if (!searchType || searchType === SearchTypes.keyword) {
        query.orWhere('photo.metadata.keywords LIKE :text COLLATE utf8_general_ci', {text: "%" + text + "%"});
      }
      let photos = await query
        .innerJoinAndSelect("photo.directory", "directory")
        .getMany();


      if (photos) {
        for (let i = 0; i < photos.length; i++) {
          photos[i].metadata.keywords = <any>JSON.parse(<any>photos[i].metadata.keywords);
          photos[i].metadata.cameraData = <any>JSON.parse(<any>photos[i].metadata.cameraData);
          photos[i].metadata.positionData = <any>JSON.parse(<any>photos[i].metadata.positionData);
          photos[i].metadata.size = <any>JSON.parse(<any>photos[i].metadata.size);
        }
        result.photos = photos;
      }

      result.directories = await connection
        .getRepository(DirectoryEntity)
        .createQueryBuilder("dir")
        .where('dir.name LIKE :text COLLATE utf8_general_ci', {text: "%" + text + "%"})
        .getMany();


      return cb(null, result);
    }).catch((error) => {
      return cb(error, null);
    });
  }

  instantSearch(text: string, cb: (error: any, result: SearchResultDTO) => void) {
    MySQLConnection.getConnection().then(async connection => {

      let result: SearchResultDTO = <SearchResultDTO>{
        searchText: text,
        directories: [],
        photos: []
      };

      let photos = await connection
        .getRepository(PhotoEntity)
        .createQueryBuilder("photo")
        .where('photo.metadata.keywords LIKE :text COLLATE utf8_general_ci', {text: "%" + text + "%"})
        .orWhere('photo.metadata.positionData LIKE :text COLLATE utf8_general_ci', {text: "%" + text + "%"})
        .orWhere('photo.name LIKE :text COLLATE utf8_general_ci', {text: "%" + text + "%"})
        .innerJoinAndSelect("photo.directory", "directory")
        .setLimit(10)
        .getMany();


      if (photos) {
        for (let i = 0; i < photos.length; i++) {
          photos[i].metadata.keywords = <any>JSON.parse(<any>photos[i].metadata.keywords);
          photos[i].metadata.cameraData = <any>JSON.parse(<any>photos[i].metadata.cameraData);
          photos[i].metadata.positionData = <any>JSON.parse(<any>photos[i].metadata.positionData);
          photos[i].metadata.size = <any>JSON.parse(<any>photos[i].metadata.size);
        }
        result.photos = photos;
      }

      let directories = await connection
        .getRepository(DirectoryEntity)
        .createQueryBuilder("dir")
        .where('dir.name LIKE :text COLLATE utf8_general_ci', {text: "%" + text + "%"})
        .setLimit(10)
        .getMany();

      result.directories = directories;

      return cb(null, result);
    }).catch((error) => {
      return cb(error, null);
    });
  }

  private encapsulateAutoComplete(values: Array<string>, type: SearchTypes) {
    let res = [];
    values.forEach((value) => {
      res.push(new AutoCompleteItem(value, type));
    });
    return res;
  }


  private autoCompleteItemsUnique(array: Array<AutoCompleteItem>) {
    let a = array.concat();
    for (let i = 0; i < a.length; ++i) {
      for (let j = i + 1; j < a.length; ++j) {
        if (a[i].equals(a[j]))
          a.splice(j--, 1);
      }
    }

    return a;
  }
}