1 | import Observable from 'zen-observable-ts';
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2 | export { default as Observable } from 'zen-observable-ts';
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3 | import { invariant, InvariantError } from 'ts-invariant';
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4 | import { __extends, __assign } from 'tslib';
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5 | import { getOperationName } from 'apollo-utilities';
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6 | export { getOperationName } from 'apollo-utilities';
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7 |
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8 | function validateOperation(operation) {
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9 | var OPERATION_FIELDS = [
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10 | 'query',
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11 | 'operationName',
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12 | 'variables',
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13 | 'extensions',
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14 | 'context',
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15 | ];
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16 | for (var _i = 0, _a = Object.keys(operation); _i < _a.length; _i++) {
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17 | var key = _a[_i];
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18 | if (OPERATION_FIELDS.indexOf(key) < 0) {
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19 | throw process.env.NODE_ENV === "production" ? new InvariantError(2) : new InvariantError("illegal argument: " + key);
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20 | }
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21 | }
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22 | return operation;
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23 | }
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24 | var LinkError = (function (_super) {
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25 | __extends(LinkError, _super);
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26 | function LinkError(message, link) {
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27 | var _this = _super.call(this, message) || this;
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28 | _this.link = link;
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29 | return _this;
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30 | }
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31 | return LinkError;
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32 | }(Error));
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33 | function isTerminating(link) {
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34 | return link.request.length <= 1;
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35 | }
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36 | function toPromise(observable) {
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37 | var completed = false;
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38 | return new Promise(function (resolve, reject) {
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39 | observable.subscribe({
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40 | next: function (data) {
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41 | if (completed) {
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42 | process.env.NODE_ENV === "production" || invariant.warn("Promise Wrapper does not support multiple results from Observable");
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43 | }
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44 | else {
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45 | completed = true;
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46 | resolve(data);
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47 | }
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48 | },
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49 | error: reject,
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50 | });
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51 | });
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52 | }
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53 | var makePromise = toPromise;
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54 | function fromPromise(promise) {
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55 | return new Observable(function (observer) {
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56 | promise
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57 | .then(function (value) {
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58 | observer.next(value);
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59 | observer.complete();
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60 | })
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61 | .catch(observer.error.bind(observer));
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62 | });
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63 | }
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64 | function fromError(errorValue) {
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65 | return new Observable(function (observer) {
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66 | observer.error(errorValue);
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67 | });
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68 | }
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69 | function transformOperation(operation) {
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70 | var transformedOperation = {
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71 | variables: operation.variables || {},
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72 | extensions: operation.extensions || {},
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73 | operationName: operation.operationName,
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74 | query: operation.query,
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75 | };
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76 | if (!transformedOperation.operationName) {
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77 | transformedOperation.operationName =
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78 | typeof transformedOperation.query !== 'string'
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79 | ? getOperationName(transformedOperation.query)
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80 | : '';
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81 | }
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82 | return transformedOperation;
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83 | }
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84 | function createOperation(starting, operation) {
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85 | var context = __assign({}, starting);
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86 | var setContext = function (next) {
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87 | if (typeof next === 'function') {
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88 | context = __assign({}, context, next(context));
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89 | }
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90 | else {
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91 | context = __assign({}, context, next);
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92 | }
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93 | };
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94 | var getContext = function () { return (__assign({}, context)); };
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95 | Object.defineProperty(operation, 'setContext', {
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96 | enumerable: false,
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97 | value: setContext,
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98 | });
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99 | Object.defineProperty(operation, 'getContext', {
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100 | enumerable: false,
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101 | value: getContext,
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102 | });
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103 | Object.defineProperty(operation, 'toKey', {
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104 | enumerable: false,
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105 | value: function () { return getKey(operation); },
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106 | });
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107 | return operation;
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108 | }
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109 | function getKey(operation) {
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110 | var query = operation.query, variables = operation.variables, operationName = operation.operationName;
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111 | return JSON.stringify([operationName, query, variables]);
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112 | }
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113 |
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114 | function passthrough(op, forward) {
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115 | return forward ? forward(op) : Observable.of();
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116 | }
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117 | function toLink(handler) {
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118 | return typeof handler === 'function' ? new ApolloLink(handler) : handler;
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119 | }
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120 | function empty() {
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121 | return new ApolloLink(function () { return Observable.of(); });
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122 | }
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123 | function from(links) {
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124 | if (links.length === 0)
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125 | return empty();
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126 | return links.map(toLink).reduce(function (x, y) { return x.concat(y); });
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127 | }
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128 | function split(test, left, right) {
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129 | var leftLink = toLink(left);
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130 | var rightLink = toLink(right || new ApolloLink(passthrough));
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131 | if (isTerminating(leftLink) && isTerminating(rightLink)) {
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132 | return new ApolloLink(function (operation) {
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133 | return test(operation)
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134 | ? leftLink.request(operation) || Observable.of()
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135 | : rightLink.request(operation) || Observable.of();
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136 | });
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137 | }
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138 | else {
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139 | return new ApolloLink(function (operation, forward) {
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140 | return test(operation)
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141 | ? leftLink.request(operation, forward) || Observable.of()
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142 | : rightLink.request(operation, forward) || Observable.of();
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143 | });
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144 | }
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145 | }
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146 | var concat = function (first, second) {
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147 | var firstLink = toLink(first);
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148 | if (isTerminating(firstLink)) {
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149 | process.env.NODE_ENV === "production" || invariant.warn(new LinkError("You are calling concat on a terminating link, which will have no effect", firstLink));
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150 | return firstLink;
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151 | }
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152 | var nextLink = toLink(second);
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153 | if (isTerminating(nextLink)) {
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154 | return new ApolloLink(function (operation) {
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155 | return firstLink.request(operation, function (op) { return nextLink.request(op) || Observable.of(); }) || Observable.of();
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156 | });
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157 | }
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158 | else {
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159 | return new ApolloLink(function (operation, forward) {
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160 | return (firstLink.request(operation, function (op) {
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161 | return nextLink.request(op, forward) || Observable.of();
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162 | }) || Observable.of());
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163 | });
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164 | }
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165 | };
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166 | var ApolloLink = (function () {
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167 | function ApolloLink(request) {
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168 | if (request)
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169 | this.request = request;
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170 | }
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171 | ApolloLink.prototype.split = function (test, left, right) {
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172 | return this.concat(split(test, left, right || new ApolloLink(passthrough)));
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173 | };
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174 | ApolloLink.prototype.concat = function (next) {
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175 | return concat(this, next);
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176 | };
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177 | ApolloLink.prototype.request = function (operation, forward) {
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178 | throw process.env.NODE_ENV === "production" ? new InvariantError(1) : new InvariantError('request is not implemented');
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179 | };
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180 | ApolloLink.empty = empty;
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181 | ApolloLink.from = from;
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182 | ApolloLink.split = split;
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183 | ApolloLink.execute = execute;
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184 | return ApolloLink;
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185 | }());
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186 | function execute(link, operation) {
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187 | return (link.request(createOperation(operation.context, transformOperation(validateOperation(operation)))) || Observable.of());
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188 | }
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189 |
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190 | export { ApolloLink, concat, createOperation, empty, execute, from, fromError, fromPromise, makePromise, split, toPromise };
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191 |
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