| 1 | "use strict";
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| 2 | Object.defineProperty(exports, "__esModule", { value: true });
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| 3 | var tslib_1 = require("tslib");
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| 4 | var zen_observable_ts_1 = tslib_1.__importDefault(require("zen-observable-ts"));
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| 5 | var ts_invariant_1 = require("ts-invariant");
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| 6 | var linkUtils_1 = require("./linkUtils");
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| 7 | function passthrough(op, forward) {
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| 8 | return forward ? forward(op) : zen_observable_ts_1.default.of();
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| 9 | }
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| 10 | function toLink(handler) {
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| 11 | return typeof handler === 'function' ? new ApolloLink(handler) : handler;
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| 12 | }
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| 13 | function empty() {
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| 14 | return new ApolloLink(function () { return zen_observable_ts_1.default.of(); });
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| 15 | }
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| 16 | exports.empty = empty;
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| 17 | function from(links) {
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| 18 | if (links.length === 0)
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| 19 | return empty();
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| 20 | return links.map(toLink).reduce(function (x, y) { return x.concat(y); });
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| 21 | }
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| 22 | exports.from = from;
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| 23 | function split(test, left, right) {
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| 24 | var leftLink = toLink(left);
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| 25 | var rightLink = toLink(right || new ApolloLink(passthrough));
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| 26 | if (linkUtils_1.isTerminating(leftLink) && linkUtils_1.isTerminating(rightLink)) {
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| 27 | return new ApolloLink(function (operation) {
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| 28 | return test(operation)
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| 29 | ? leftLink.request(operation) || zen_observable_ts_1.default.of()
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| 30 | : rightLink.request(operation) || zen_observable_ts_1.default.of();
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| 31 | });
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| 32 | }
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| 33 | else {
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| 34 | return new ApolloLink(function (operation, forward) {
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| 35 | return test(operation)
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| 36 | ? leftLink.request(operation, forward) || zen_observable_ts_1.default.of()
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| 37 | : rightLink.request(operation, forward) || zen_observable_ts_1.default.of();
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| 38 | });
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| 39 | }
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| 40 | }
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| 41 | exports.split = split;
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| 42 | exports.concat = function (first, second) {
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| 43 | var firstLink = toLink(first);
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| 44 | if (linkUtils_1.isTerminating(firstLink)) {
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| 45 | ts_invariant_1.invariant.warn(new linkUtils_1.LinkError("You are calling concat on a terminating link, which will have no effect", firstLink));
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| 46 | return firstLink;
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| 47 | }
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| 48 | var nextLink = toLink(second);
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| 49 | if (linkUtils_1.isTerminating(nextLink)) {
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| 50 | return new ApolloLink(function (operation) {
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| 51 | return firstLink.request(operation, function (op) { return nextLink.request(op) || zen_observable_ts_1.default.of(); }) || zen_observable_ts_1.default.of();
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| 52 | });
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| 53 | }
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| 54 | else {
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| 55 | return new ApolloLink(function (operation, forward) {
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| 56 | return (firstLink.request(operation, function (op) {
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| 57 | return nextLink.request(op, forward) || zen_observable_ts_1.default.of();
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| 58 | }) || zen_observable_ts_1.default.of());
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| 59 | });
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| 60 | }
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| 61 | };
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| 62 | var ApolloLink = (function () {
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| 63 | function ApolloLink(request) {
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| 64 | if (request)
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| 65 | this.request = request;
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| 66 | }
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| 67 | ApolloLink.prototype.split = function (test, left, right) {
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| 68 | return this.concat(split(test, left, right || new ApolloLink(passthrough)));
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| 69 | };
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| 70 | ApolloLink.prototype.concat = function (next) {
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| 71 | return exports.concat(this, next);
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| 72 | };
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| 73 | ApolloLink.prototype.request = function (operation, forward) {
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| 74 | throw new ts_invariant_1.InvariantError('request is not implemented');
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| 75 | };
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| 76 | ApolloLink.empty = empty;
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| 77 | ApolloLink.from = from;
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| 78 | ApolloLink.split = split;
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| 79 | ApolloLink.execute = execute;
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| 80 | return ApolloLink;
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| 81 | }());
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| 82 | exports.ApolloLink = ApolloLink;
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| 83 | function execute(link, operation) {
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| 84 | return (link.request(linkUtils_1.createOperation(operation.context, linkUtils_1.transformOperation(linkUtils_1.validateOperation(operation)))) || zen_observable_ts_1.default.of());
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| 85 | }
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| 86 | exports.execute = execute;
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| 87 | |
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