D-Net

import {Component, ViewChild} from "@angular/core";

import {SearchUtilsClass} from "../../openaireLibrary/searchPages/searchUtils/searchUtils.class";

import {ErrorMessagesComponent} from "../../openaireLibrary/utils/errorMessages.component";

import {ErrorCodes} from "../../openaireLibrary/utils/properties/errorCodes";

import {EnvProperties} from "../../openaireLibrary/utils/properties/env-properties";

import {SearchPageComponent} from "../../openaireLibrary/searchPages/searchUtils/searchPage.component";

import {ActivatedRoute} from "@angular/router";

import {Filter, Value} from "../../openaireLibrary/searchPages/searchUtils/searchHelperClasses.class";

import {SearchFields} from "../../openaireLibrary/utils/properties/searchFields";

import {CommunitiesService} from "../../openaireLibrary/connect/communities/communities.service";

import {Session, User} from "../../openaireLibrary/login/utils/helper.class";

import {CommunityInfo} from "../../openaireLibrary/connect/community/communityInfo";

import {SubscribeService} from "../../openaireLibrary/utils/subscribe/subscribe.service";

import {StringUtils} from "../../openaireLibrary/utils/string-utils.class";

import {HelperFunctions} from "../../openaireLibrary/utils/HelperFunctions.class";

import {UserManagementService} from "../../openaireLibrary/services/user-management.service";

@Component({

  selector: 'search-communities',

  template: `

      <search-page pageTitle="OpenAIRE-Connect | Search Communities"

                   [hasPrefix]=false [piwikSiteId]="piwikSiteId" 

                   searchFormClass="communitiesSearchForm"

                   [formPlaceholderText]="'Search for Research Communities' + ((showType)?' and Initiatives':'')"

                   type="communities" entityType="community" [filters]="filters"

                   [results]="results" [searchUtils]="searchUtils"

                   [showResultCount]=true [baseUrl]="baseUrl"

                   [disableForms]="disableForms"

                   [lastIndex]=false [sort]=true

                   [showType]="showType">

      </search-page>

  `

})

export class SearchCommunitiesComponent {

  public piwikSiteId = null;

  private errorCodes: ErrorCodes;

  private errorMessages: ErrorMessagesComponent;

  public results: CommunityInfo[] = [];

  public totalResults: CommunityInfo[] = [];

  public sub: any; public subResults: any;

  public filters = [];

  public searchFields:SearchFields = new SearchFields();

  public searchUtils:SearchUtilsClass = new SearchUtilsClass();

  public disableForms: boolean = false;

  public baseUrl: string = null;

  public refineFields: string[] =  this.searchFields.COMMUNITIES_SEARCH_FIELDS;

  public showType = false;

  properties:EnvProperties;

  @ViewChild (SearchPageComponent) searchPage : SearchPageComponent ;

  private user: User;

  constructor (private route: ActivatedRoute,

               private _communitiesService: CommunitiesService,

               private _subscribeService: SubscribeService,

               private userManagementService: UserManagementService) {

    this.errorCodes = new ErrorCodes();

    this.errorMessages = new ErrorMessagesComponent();

    this.searchUtils.status = this.errorCodes.LOADING;

  }

  public ngOnInit() {

    this.route.data

        .subscribe((data: { envSpecific: EnvProperties }) => {

          this.properties = data.envSpecific;

          this.piwikSiteId = this.properties.piwikSiteId;

          this.baseUrl = data.envSpecific.searchLinkToCommunities;

        });

    this.sub =  this.route.queryParams.subscribe(params => {

      this.searchPage.resultsPerPage = 10;

      this.searchUtils.keyword = (params['keyword']?params['keyword']:'');

      this.searchUtils.page = (params['page'] === undefined) ? 1: + params['page'];

      this.searchUtils.sortBy = (params['sortBy'] === undefined)? '' : params['sortBy'];

      this.searchUtils.size = (params['size'] === undefined) ? this.searchPage.resultsPerPage: +params['size'];

      this.searchPage.searchUtils = this.searchUtils;

      if(this.searchUtils.size != 5 && this.searchUtils.size != 10 && this.searchUtils.size != 20 && this.searchUtils.size != 50) {

        this.searchUtils.size = this.searchPage.resultsPerPage;

      }

      if(this.searchUtils.sortBy && this.searchUtils.sortBy != "creationdate,descending" && this.searchUtils.sortBy != "creationdate,ascending") {

        this.searchUtils.sortBy = "";

      }

      this.searchPage.refineFields = this.refineFields;

      let queryParams = this.searchPage.getQueryParamsFromUrl(params);

      if(typeof document !== 'undefined') {

        this.userManagementService.getUserInfo().subscribe(user => {

          this.user = user;

          this.initCommunities(queryParams);

        });

      } else  {

        this.initCommunities(queryParams);

      }

    });

  }

  public ngOnDestroy() {

    if(this.sub){

      this.sub.unsubscribe();

    }

    if(this.subResults){

      this.subResults.unsubscribe();

    }

  }

  /**

   * Initialize communities from Communities APIs

   *

   * @param params

   */

  private initCommunities(params: Map<string, string>) {

    this.subResults = this._communitiesService.getCommunitiesState().subscribe(

        data => {

          if(!data){

            return;

          }

          for(let i = 0; i < data.length; i++) {

            this.totalResults[i] = data[i];

            this.totalResults[i].isManager = false;

            this.totalResults[i].isSubscribed = false;

            if(this.user) {

              this.totalResults[i].isManager = this.isCommunityManager(this.totalResults[i]);

            }

          }

          if(this.user) {

            this._subscribeService.getCommunitiesSubscribedTo(this.properties/*, this.user.email*/).subscribe(

              res => {

                for (let i = 0; i < this.totalResults.length; i++) {

                  this.totalResults[i].isSubscribed = (res.indexOf(this.totalResults[i].communityId) != -1);

                }

                this._getResults(params);

              }

            );

          }

          else {

            this._getResults(params);

          }

        },

        err => {

          this.handleError('Error getting communities', err);

          this.searchUtils.status = this.errorMessages.getErrorCode(err.status);

          this.disableForms = false;

          HelperFunctions.scroll();

        }

      );

  }

  /**

   * Get all communities from Communities API and apply permission access validator,

   * keyword searching, filter, paging and sorting.

   *

   * @param params, status

   * @private

   */

  private _getResults(params: Map<string, string>){

    this.searchUtils.status = this.errorCodes.LOADING;

    this.disableForms = true;

    this.results = this.totalResults;

    if(this.filters.length === 0) {

      this.filters = this.createFilters();

    }

    this.searchUtils.totalResults = 0;

    this.applyParams(params);

  }

  /**

   * Return the communities in which user has permission to view or manage.

   */

  private showCommunities() {

    let ret: CommunityInfo[] = [];

    for(let result of this.results) {

      if (result.status == 'hidden') {

        continue;

      } else if (result.status == "manager") {

        let mail = (this.user)?this.user.email:null;

        if (mail == null) { // no user

          continue;

        } else if (Session.isCommunityCurator(this.user) || Session.isPortalAdministrator(this.user)) {

          ret.push(result);

        } else if (result.managers.indexOf(mail) != -1) {

          ret.push(result);

        }

        continue;

      }

      ret.push(result);

    }

    this.results = ret;

  }

  /**

   * Apply permission access validator,

   * keyword searching, filter, paging and sorting.

   *

   * @param params

   * @param status

   */

  public applyParams(params: Map<string, string>) {

    this.showCommunities();

    if(this.searchUtils.keyword && this.searchUtils.keyword != '') {

      this.searchForKeywords();

    }

    this.checkFilters(params);

    this.sort();

    this.searchUtils.totalResults = this.results.length;

    this.searchPage.checkSelectedFilters(this.filters);

    this.searchPage.updateBaseUrlWithParameters(this.filters);

    this.results = this.results.slice((this.searchUtils.page-1)*this.searchUtils.size, (this.searchUtils.page*this.searchUtils.size));

    this.searchUtils.status = this.errorCodes.DONE;

    if(this.searchUtils.totalResults == 0 ){

      this.searchUtils.status = this.errorCodes.NONE;

    }

    this.disableForms = false;

    if(this.searchUtils.status == this.errorCodes.DONE) {

      // Page out of limit!!!

      let totalPages:any = this.searchUtils.totalResults/(this.searchUtils.size);

      if(!(Number.isInteger(totalPages))) {

        totalPages = (parseInt(totalPages, 10) + 1);

      }

      if(totalPages < this.searchUtils.page) {

        this.searchUtils.totalResults = 0;

        this.searchUtils.status = this.errorCodes.OUT_OF_BOUND;

      }

    }

    HelperFunctions.scroll();

  }

  /**

   * Parse the given keywords into array and check if any of the requirements field of a community includes

   * one of the given words.

   */

  private searchForKeywords() {

      let ret: CommunityInfo[] = [];

      let keywords: string[] = this.searchUtils.keyword.split(/,(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)/,-1);

      for(let i = 0; i < this.results.length; i++) {

          for(let keyword of keywords) {

            keyword = keyword.toLowerCase();

            if (keyword != '' && (this.results[i].title.toLowerCase().includes(keyword) || this.results[i].shortTitle.toLowerCase().includes(keyword) ||

                this.results[i].communityId.toLowerCase().includes(keyword) || this.results[i].description.toLowerCase().includes(keyword))) {

                ret.push(this.results[i]);

                break;

            }

          }

      }

      this.results = ret;

  }

  /**

   * Check the current results if they satisfy the values of each filter category and

   * update the number of possible results in each value.

   *

   * @param params

   */

  private checkFilters(params: Map<string, string>) {

    let typeResults: CommunityInfo[] = this.applyFilter('type', params);

    let statusResults: CommunityInfo[] = this.results;

    let roleResults: CommunityInfo[] = this.results;

    if(this.user) {

      statusResults = this.applyFilter('status', params);

      roleResults = this.applyFilter('role', params);

      this.resetFilterNumbers('status');

      this.updateFilterNumbers(typeResults.filter(value => {

        return roleResults.includes(value);

      }), 'status');

      this.resetFilterNumbers('role');

      this.updateFilterNumbers(statusResults.filter(value => {

        return typeResults.includes(value);

      }), 'role');

    }

    this.resetFilterNumbers('type');

    this.updateFilterNumbers(statusResults.filter(value => {

      return roleResults.includes(value);

    }), 'type');

    this.results = statusResults.filter(value => {

      return typeResults.includes(value);

    })

    this.results = this.results.filter(value => {

      return roleResults.includes(value);

    });

  }

  /**

   * Apply filter with filterId and return the results

   *

   * @param filterId

   * @param params

   */

  private applyFilter(filterId: string, params: Map<string, string>): CommunityInfo[] {

    let results:CommunityInfo[] = [];

    let values: string[] = [];

    if(params.get(filterId) != undefined) {

      values = (StringUtils.URIDecode(params.get(filterId))).split(/,(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)/,-1);

    }

    if(filterId == 'type') {

      for (let i = 0; i < this.results.length; i++) {

        if (values.length == 0) {

          results.push(this.results[i]);

        } else {

          for (let value of values) {

            if (this.results[i].type == value.replace(/["']/g, "")) {

              results.push(this.results[i]);

              break;

            }

          }

        }

      }

    }

    else if(filterId == 'status') {

      for (let i = 0; i < this.results.length; i++) {

        if (values.length == 0) {

          results.push(this.results[i]);

        } else {

          for (let value of values) {

            if (value.replace(/["']/g, "") == 'subscribed') {

              if (this.results[i].isSubscribed) {

                results.push(this.results[i]);

                break;

              }

            } else if (value.replace(/["']/g, "") == 'nonsubscribed') {

              if (!this.results[i].isSubscribed) {

                results.push(this.results[i]);

                break;

              }

            }

          }

        }

      }

    }

    else if(filterId == 'role') {

      for (let i = 0; i < this.results.length; i++) {

        if (values.length == 0) {

          results.push(this.results[i]);

        } else {

          for (let value of values) {

            if (value.replace(/["']/g, "") == 'manager') {

              if (this.results[i].isManager) {

                results.push(this.results[i]);

                break;

              }

            }

          }

        }

      }

    }

    return results;

  }

    /**

     * Reset the values of filter with id filterId with zero.

     *

     * @param filterId

     */

  private resetFilterNumbers(filterId: string) {

    for (let i = 0; i < this.filters.length; i++) {

      if(this.filters[i].filterId == filterId) {

        for (let j = 0; j < this.filters[i].values.length; j++) {

          this.filters[i].values[j].number = 0;

        }

        break;

      }

    }

  }

    /**

     * Update the values of filter with id filterId based on

     * results.

     *

     * @param results

     * @param filterId

     */

  private updateFilterNumbers(results: CommunityInfo[], filterId: string) {

    for(let k = 0; k < results.length; k++) {

      for (let i = 0; i < this.filters.length; i++) {

        if(this.filters[i].filterId == filterId) {

            if (this.filters[i].filterId == 'type') {

                for (let j = 0; j < this.filters[i].values.length; j++) {

                    if (results[k].type == this.filters[i].values[j].id) {

                        this.filters[i].values[j].number++;

                    }

                }

            }

            else if (this.filters[i].filterId == 'status') {

                if (results[k].isSubscribed) {

                    this.filters[i].values[0].number++;

                } else {

                    this.filters[i].values[1].number++;

                }

            }

            else if (this.filters[i].filterId == 'role') {

                if (results[k].isManager) {

                  this.filters[i].values[0].number++;

                }

            }

            break;

        }

      }

    }

  }

    /**

     * Sorting results based on sortBy.

     */

  private sort() {

    if(this.searchUtils.sortBy == '') {

      this.results.sort((left, right): number => {

        if (left.title > right.title) {

          return 1;

        } else if (left.title < right.title) {

          return -1;

        } else {

          return 0;

        }

      })

    } else if(this.searchUtils.sortBy == 'creationdate,descending') {

      this.results.sort((left, right): number => {

        if (!right.date || left.date > right.date) {

          return -1;

        } else if (!left.date || left.date < right.date) {

          return 1;

        } else {

          return 0;

        }

      })

    } else if(this.searchUtils.sortBy == 'creationdate,ascending') {

      this.results.sort((left, right): number => {

        if (!right.date || left.date > right.date) {

          return 1;

        } else if (!left.date || left.date < right.date) {

          return -1;

        } else {

          return 0;

        }

      })

    }

  }

  private isCommunityManager(community: CommunityInfo): boolean {

    return Session.isCommunityCurator(this.user) || community.managers.indexOf(this.user.email) != -1;

  }

    /**

     * Create Search Communities filters.

     *

     */

  private createFilters(): Filter[] {

    let filter_names = [];

    let filter_ids = [];

    let searchFields = new SearchFields();

    let filter_original_ids = searchFields.COMMUNITIES_SEARCH_FIELDS;

    let value_names = [];

    let value_original_ids=[];

    this.showType = this.results.filter(community => community.type === 'ri').length > 0;

    if(this.showType) {

      filter_names.push("Type");

      filter_ids.push("type");

      value_names.push([ "Research Communities", "Research Initiatives" ]);

      value_original_ids.push(["community","ri"]);

    } else {

      filter_original_ids = searchFields.COMMUNITIES_SEARCH_FIELDS.splice(0, 1);

    }

    if(this.user) {

      filter_names.push("Status");

      filter_ids.push("status");

      value_names.push([ "Subscribed", "Non-subscribed"]);

      value_original_ids.push(["subscribed", "nonsubscribed"]);

      filter_names.push("Role");

      filter_ids.push("role");

      value_names.push([ "Manager"]);

      value_original_ids.push(["manager"]);

    }

    let filters: Filter[] = [];

    for(let  i =0 ; i < filter_names.length; i++){

      let values: Value[] = [];

      for(let j =0 ; j < value_names[i].length; j++){

        let value: Value = {name: value_names[i][j], id: value_original_ids[i][j], number:0, selected:false};

        values.push(value);

      }

      let filter: Filter = {title: filter_names[i], filterId: filter_ids[i], originalFilterId:  filter_original_ids[i], values : values, countSelectedValues:0, "filterOperator": 'or', valueIsExact: true , filterType: "checkbox"};

      filters.push(filter);

    }

    return filters;

  }

  private handleError(message: string, error) {

    console.error('Communities Search Page: ' + message, error);

  }

}