@spartacus/core
Version:
Spartacus - the core framework
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JavaScript
import { Injectable } from '@angular/core';
import { mergeFields, parseFields } from '../utils/occ-fields';
import * as i0 from "@angular/core";
import * as i1 from "@angular/common/http";
/**
* Helper service for optimizing endpoint calls to occ backend
*/
export class OccFieldsService {
constructor(http) {
this.http = http;
this.FIELDS_PARAM = 'fields';
}
/**
* Merge similar occ endpoints calls by merging fields parameter
*
* We assume that different scopes are defined by different fields parameters,
* so we are grouping all requests with the same urls (except fields definition)
* and merging into one request with fields that will satisfy all separate ones.
*
* @param models
*/
getOptimalUrlGroups(models) {
const groupedByUrls = {};
for (const model of models) {
const [urlPart, fields] = this.splitFields(model.url);
if (!groupedByUrls[urlPart]) {
groupedByUrls[urlPart] = {};
}
model.fields = fields ? parseFields(fields) : {};
groupedByUrls[urlPart][model.scopedData.scope] = model;
}
const mergedUrls = {};
for (const [url, group] of Object.entries(groupedByUrls)) {
const urlWithFields = this.getUrlWithFields(url, Object.values(group).map((lo) => lo.fields));
mergedUrls[urlWithFields] = group;
}
return mergedUrls;
}
/**
* Extract fields parameter from occ endpoint url
*
* @param urlWithFields
*/
splitFields(urlWithFields) {
const [url, params] = urlWithFields.split('?');
const paramsMap = {};
if (params) {
params.split('&').forEach((param) => {
const keyValue = param.split('=');
paramsMap[keyValue[0]] = keyValue[1];
});
}
const nonFieldsParams = Object.keys(paramsMap)
.sort()
.reduce((id, par) => {
if (par !== this.FIELDS_PARAM) {
id.push(paramsMap[par] ? `${par}=${paramsMap[par]}` : par);
}
return id;
}, []);
const nonFields = nonFieldsParams.join('&');
return [
nonFields ? `${url}?${nonFields}` : url,
paramsMap[this.FIELDS_PARAM],
];
}
/**
* Combine url with field parameters
*
* @param url
* @param fields
*/
getUrlWithFields(url, fields) {
const mergedFields = mergeFields(fields);
if (mergedFields) {
url += url.includes('?') ? '&' : '?';
url += `${this.FIELDS_PARAM}=${mergedFields}`;
}
return url;
}
}
OccFieldsService.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "12.0.5", ngImport: i0, type: OccFieldsService, deps: [{ token: i1.HttpClient }], target: i0.ɵɵFactoryTarget.Injectable });
OccFieldsService.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "12.0.5", ngImport: i0, type: OccFieldsService, providedIn: 'root' });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "12.0.5", ngImport: i0, type: OccFieldsService, decorators: [{
type: Injectable,
args: [{
providedIn: 'root',
}]
}], ctorParameters: function () { return [{ type: i1.HttpClient }]; } });
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parseFields(fields) : {};\n      groupedByUrls[urlPart][model.scopedData.scope] = model;\n    }\n\n    const mergedUrls: OccOptimimalUrlGroups = {};\n    for (const [url, group] of Object.entries(groupedByUrls)) {\n      const urlWithFields = this.getUrlWithFields(\n        url,\n        Object.values(group).map((lo) => lo.fields)\n      );\n      mergedUrls[urlWithFields] = group;\n    }\n\n    return mergedUrls;\n  }\n\n  /**\n   * Extract fields parameter from occ endpoint url\n   *\n   * @param urlWithFields\n   */\n  private splitFields(urlWithFields: string): [string, string] {\n    const [url, params] = urlWithFields.split('?');\n\n    const paramsMap = {};\n\n    if (params) {\n      params.split('&').forEach((param) => {\n        const keyValue = param.split('=');\n        paramsMap[keyValue[0]] = keyValue[1];\n      });\n    }\n\n    const nonFieldsParams = Object.keys(paramsMap)\n      .sort()\n      .reduce((id, par) => {\n        if (par !== this.FIELDS_PARAM) {\n          id.push(paramsMap[par] ? `${par}=${paramsMap[par]}` : par);\n        }\n        return id;\n      }, []);\n\n    const nonFields = nonFieldsParams.join('&');\n\n    return [\n      nonFields ? `${url}?${nonFields}` : url,\n      paramsMap[this.FIELDS_PARAM],\n    ];\n  }\n\n  /**\n   * Combine url with field parameters\n   *\n   * @param url\n   * @param fields\n   */\n  private getUrlWithFields(url: string, fields: (string | object)[]): string {\n    const mergedFields = mergeFields(fields);\n\n    if (mergedFields) {\n      url += url.includes('?') ? '&' : '?';\n      url += `${this.FIELDS_PARAM}=${mergedFields}`;\n    }\n\n    return url;\n  }\n}\n"]}