ornamentum/esm2015/dropdown/services/dropdown-resource.service.js

Angular Toolkit

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
import { Injectable } from '@angular/core';
import { ReplaySubject, of } from 'rxjs';
import { switchMap } from 'rxjs/operators';
import { get } from '../../utility/services/object-utility.class';
/**
 * Dropdown resource service. Dropdown client side data query is handled via this service.
 * @template T
 */
export class DropdownResourceService {
    /**
     * Set source data source.
     * @param {?} dataSource Data source observable.
     * @return {?}
     */
    setDataSource(dataSource) {
        this.dispose();
        if (this.optionDataStream && !this.optionDataStream.closed) {
            this.optionDataStream.complete();
        }
        this.optionDataStream = new ReplaySubject(1);
        this.dataSourceSubscription = dataSource.subscribe((/**
         * @param {?} options
         * @return {?}
         */
        (options) => {
            this.optionDataStream.next(options);
        }));
    }
    /**
     * Query data.
     * @param {?} params Dropdown request parameters.
     * @return {?}
     */
    query(params) {
        return this.optionDataStream.pipe(switchMap((/**
         * @param {?} options
         * @return {?}
         */
        (options) => {
            /** @type {?} */
            let result = options.slice();
            if (params.filter && params.filter.value) {
                /** @type {?} */
                const value = String(params.filter.value).toLowerCase();
                result = result.filter((/**
                 * @param {?} option
                 * @return {?}
                 */
                (option) => {
                    /** @type {?} */
                    const key = String(get(option, params.filter.key)).toLowerCase();
                    return key.includes(value);
                }));
            }
            if (params.offset !== undefined) {
                /** @type {?} */
                const offset = params.offset + 1 > result.length ? 0 : params.offset;
                if (params.limit === undefined) {
                    result = result.slice(offset, result.length);
                }
                else {
                    result = result.slice(offset, offset + params.limit);
                }
            }
            return of({
                options: result,
                count: options.length
            });
        })));
    }
    /**
     * Dispose data source.
     * @return {?}
     */
    dispose() {
        if (this.dataSourceSubscription) {
            this.dataSourceSubscription.unsubscribe();
            this.dataSourceSubscription = null;
        }
        if (this.optionDataStream && !this.optionDataStream.closed) {
            this.optionDataStream.complete();
        }
    }
}
DropdownResourceService.decorators = [
    { type: Injectable }
];
if (false) {
    /**
     * @type {?}
     * @private
     */
    DropdownResourceService.prototype.optionDataStream;
    /**
     * @type {?}
     * @private
     */
    DropdownResourceService.prototype.dataSourceSubscription;
}
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