1 | import { Injectable } from '@angular/core';
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2 | import { ApolloLink, Observable as LinkObservable, } from '@apollo/client/core';
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3 | import { BatchLink } from '@apollo/client/link/batch';
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4 | import { print } from 'graphql';
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5 | import { createHeadersWithClientAwereness, fetch, mergeHeaders, prioritize, } from './utils';
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6 | import * as i0 from "@angular/core";
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7 | import * as i1 from "@angular/common/http";
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8 | const defaults = {
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9 | batchInterval: 10,
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10 | batchMax: 10,
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11 | uri: 'graphql',
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12 | method: 'POST',
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13 | };
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14 | export class HttpBatchLinkHandler extends ApolloLink {
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15 | constructor(httpClient, options) {
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16 | super();
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17 | this.httpClient = httpClient;
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18 | this.options = options;
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19 | this.print = print;
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20 | this.batchInterval = options.batchInterval || defaults.batchInterval;
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21 | this.batchMax = options.batchMax || defaults.batchMax;
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22 | if (this.options.operationPrinter) {
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23 | this.print = this.options.operationPrinter;
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24 | }
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25 | const batchHandler = (operations) => {
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26 | return new LinkObservable((observer) => {
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27 | const body = this.createBody(operations);
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28 | const headers = this.createHeaders(operations);
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29 | const { method, uri, withCredentials } = this.createOptions(operations);
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30 | if (typeof uri === 'function') {
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31 | throw new Error(`Option 'uri' is a function, should be a string`);
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32 | }
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33 | const req = {
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34 | method,
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35 | url: uri,
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36 | body: body,
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37 | options: {
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38 | withCredentials,
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39 | headers,
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40 | },
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41 | };
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42 | const sub = fetch(req, this.httpClient, () => {
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43 | throw new Error('File upload is not available when combined with Batching');
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44 | }).subscribe({
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45 | next: (result) => observer.next(result.body),
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46 | error: (err) => observer.error(err),
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47 | complete: () => observer.complete(),
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48 | });
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49 | return () => {
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50 | if (!sub.closed) {
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51 | sub.unsubscribe();
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52 | }
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53 | };
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54 | });
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55 | };
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56 | const batchKey = options.batchKey ||
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57 | ((operation) => {
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58 | return this.createBatchKey(operation);
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59 | });
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60 | this.batcher = new BatchLink({
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61 | batchInterval: this.batchInterval,
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62 | batchMax: this.batchMax,
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63 | batchKey,
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64 | batchHandler,
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65 | });
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66 | }
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67 | createOptions(operations) {
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68 | const context = operations[0].getContext();
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69 | return {
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70 | method: prioritize(context.method, this.options.method, defaults.method),
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71 | uri: prioritize(context.uri, this.options.uri, defaults.uri),
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72 | withCredentials: prioritize(context.withCredentials, this.options.withCredentials),
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73 | };
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74 | }
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75 | createBody(operations) {
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76 | return operations.map((operation) => {
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77 | const includeExtensions = prioritize(operation.getContext().includeExtensions, this.options.includeExtensions, false);
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78 | const includeQuery = prioritize(operation.getContext().includeQuery, this.options.includeQuery, true);
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79 | const body = {
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80 | operationName: operation.operationName,
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81 | variables: operation.variables,
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82 | };
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83 | if (includeExtensions) {
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84 | body.extensions = operation.extensions;
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85 | }
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86 | if (includeQuery) {
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87 | body.query = this.print(operation.query);
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88 | }
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89 | return body;
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90 | });
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91 | }
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92 | createHeaders(operations) {
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93 | return operations.reduce((headers, operation) => {
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94 | return mergeHeaders(headers, operation.getContext().headers);
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95 | }, createHeadersWithClientAwereness({
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96 | headers: this.options.headers,
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97 | clientAwareness: operations[0]?.getContext()?.clientAwareness,
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98 | }));
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99 | }
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100 | createBatchKey(operation) {
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101 | const context = operation.getContext();
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102 | if (context.skipBatching) {
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103 | return Math.random().toString(36).substr(2, 9);
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104 | }
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105 | const headers = context.headers &&
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106 | context.headers.keys().map((k) => context.headers.get(k));
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107 | const opts = JSON.stringify({
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108 | includeQuery: context.includeQuery,
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109 | includeExtensions: context.includeExtensions,
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110 | headers,
|
111 | });
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112 | return prioritize(context.uri, this.options.uri) + opts;
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113 | }
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114 | request(op) {
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115 | return this.batcher.request(op);
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116 | }
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117 | }
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118 | export class HttpBatchLink {
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119 | constructor(httpClient) {
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120 | this.httpClient = httpClient;
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121 | }
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122 | create(options) {
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123 | return new HttpBatchLinkHandler(this.httpClient, options);
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124 | }
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125 | }
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126 | HttpBatchLink.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "14.0.6", ngImport: i0, type: HttpBatchLink, deps: [{ token: i1.HttpClient }], target: i0.ɵɵFactoryTarget.Injectable });
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127 | HttpBatchLink.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "14.0.6", ngImport: i0, type: HttpBatchLink, providedIn: 'root' });
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128 | i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "14.0.6", ngImport: i0, type: HttpBatchLink, decorators: [{
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129 | type: Injectable,
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130 | args: [{
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131 | providedIn: 'root',
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132 | }]
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133 | }], ctorParameters: function () { return [{ type: i1.HttpClient }]; } });
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{Injectable} from '@angular/core';\nimport {HttpClient, HttpHeaders} from '@angular/common/http';\nimport {\n  ApolloLink,\n  Observable as LinkObservable,\n  Operation,\n  FetchResult,\n} from '@apollo/client/core';\nimport {BatchLink, BatchHandler} from '@apollo/client/link/batch';\nimport {print} from 'graphql';\nimport {Body, Context, Request, Options, OperationPrinter} from './types';\nimport {\n  createHeadersWithClientAwereness,\n  fetch,\n  mergeHeaders,\n  prioritize,\n} from './utils';\n\nimport {BatchOptions} from './types';\n\nconst defaults = {\n  batchInterval: 10,\n  batchMax: 10,\n  uri: 'graphql',\n  method: 'POST',\n};\n\nexport class HttpBatchLinkHandler extends ApolloLink {\n  public batcher: ApolloLink;\n  private batchInterval: number;\n  private batchMax: number;\n  private print: OperationPrinter = print;\n\n  constructor(private httpClient: HttpClient, private options: BatchOptions) {\n    super();\n\n    this.batchInterval = options.batchInterval || defaults.batchInterval;\n    this.batchMax = options.batchMax || defaults.batchMax;\n\n    if (this.options.operationPrinter) {\n      this.print = this.options.operationPrinter;\n    }\n\n    const batchHandler: BatchHandler = (operations: Operation[]) => {\n      return new LinkObservable((observer: any) => {\n        const body = this.createBody(operations);\n        const headers = this.createHeaders(operations);\n        const {method, uri, withCredentials} = this.createOptions(operations);\n\n        if (typeof uri === 'function') {\n          throw new Error(`Option 'uri' is a function, should be a string`);\n        }\n\n        const req: Request = {\n          method,\n          url: uri,\n          body: body,\n          options: {\n            withCredentials,\n            headers,\n          },\n        };\n\n        const sub = fetch(req, this.httpClient, () => {\n          throw new Error(\n            'File upload is not available when combined with Batching',\n          );\n        }).subscribe({\n          next: (result) => observer.next(result.body),\n          error: (err) => observer.error(err),\n          complete: () => observer.complete(),\n        });\n\n        return () => {\n          if (!sub.closed) {\n            sub.unsubscribe();\n          }\n        };\n      });\n    };\n\n    const batchKey =\n      options.batchKey ||\n      ((operation: Operation) => {\n        return this.createBatchKey(operation);\n      });\n\n    this.batcher = new BatchLink({\n      batchInterval: this.batchInterval,\n      batchMax: this.batchMax,\n      batchKey,\n      batchHandler,\n    });\n  }\n\n  private createOptions(operations: Operation[]): Options {\n    const context: Context = operations[0].getContext();\n\n    return {\n      method: prioritize(context.method, this.options.method, defaults.method),\n      uri: prioritize(context.uri, this.options.uri, defaults.uri),\n      withCredentials: prioritize(\n        context.withCredentials,\n        this.options.withCredentials,\n      ),\n    };\n  }\n\n  private createBody(operations: Operation[]): Body[] {\n    return operations.map((operation) => {\n      const includeExtensions = prioritize(\n        operation.getContext().includeExtensions,\n        this.options.includeExtensions,\n        false,\n      );\n      const includeQuery = prioritize(\n        operation.getContext().includeQuery,\n        this.options.includeQuery,\n        true,\n      );\n\n      const body: Body = {\n        operationName: operation.operationName,\n        variables: operation.variables,\n      };\n\n      if (includeExtensions) {\n        body.extensions = operation.extensions;\n      }\n\n      if (includeQuery) {\n        body.query = this.print(operation.query);\n      }\n\n      return body;\n    });\n  }\n\n  private createHeaders(operations: Operation[]): HttpHeaders {\n    return operations.reduce(\n      (headers: HttpHeaders, operation: Operation) => {\n        return mergeHeaders(headers, operation.getContext().headers);\n      },\n      createHeadersWithClientAwereness({\n        headers: this.options.headers,\n        clientAwareness: operations[0]?.getContext()?.clientAwareness,\n      }),\n    );\n  }\n\n  private createBatchKey(operation: Operation): string {\n    const context: Context & {skipBatching?: boolean} = operation.getContext();\n\n    if (context.skipBatching) {\n      return Math.random().toString(36).substr(2, 9);\n    }\n\n    const headers =\n      context.headers &&\n      context.headers.keys().map((k: string) => context.headers.get(k));\n\n    const opts = JSON.stringify({\n      includeQuery: context.includeQuery,\n      includeExtensions: context.includeExtensions,\n      headers,\n    });\n\n    return prioritize(context.uri, this.options.uri) + opts;\n  }\n\n  public request(op: Operation): LinkObservable<FetchResult> | null {\n    return this.batcher.request(op);\n  }\n}\n\n@Injectable({\n  providedIn: 'root',\n})\nexport class HttpBatchLink {\n  constructor(private httpClient: HttpClient) {}\n\n  public create(options: BatchOptions): HttpBatchLinkHandler {\n    return new HttpBatchLinkHandler(this.httpClient, options);\n  }\n}\n"]} |
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