{"version":3,"file":"batch.cjs","sources":["batching.js","batchLink.js"],"sourcesContent":["import { __assign } from \"tslib\";\nimport { Observable } from '../../utilities';\nvar OperationBatcher = (function () {\n    function OperationBatcher(_a) {\n        var batchDebounce = _a.batchDebounce, batchInterval = _a.batchInterval, batchMax = _a.batchMax, batchHandler = _a.batchHandler, batchKey = _a.batchKey;\n        this.batchesByKey = new Map();\n        this.batchDebounce = batchDebounce;\n        this.batchInterval = batchInterval;\n        this.batchMax = batchMax || 0;\n        this.batchHandler = batchHandler;\n        this.batchKey = batchKey || (function () { return ''; });\n    }\n    OperationBatcher.prototype.enqueueRequest = function (request) {\n        var _this = this;\n        var requestCopy = __assign(__assign({}, request), { next: [], error: [], complete: [], subscribers: new Set() });\n        var key = this.batchKey(request.operation);\n        if (!requestCopy.observable) {\n            requestCopy.observable = new Observable(function (observer) {\n                var batch = _this.batchesByKey.get(key);\n                if (!batch)\n                    _this.batchesByKey.set(key, batch = new Set());\n                var isFirstEnqueuedRequest = batch.size === 0;\n                var isFirstSubscriber = requestCopy.subscribers.size === 0;\n                requestCopy.subscribers.add(observer);\n                if (isFirstSubscriber) {\n                    batch.add(requestCopy);\n                }\n                if (observer.next) {\n                    requestCopy.next.push(observer.next.bind(observer));\n                }\n                if (observer.error) {\n                    requestCopy.error.push(observer.error.bind(observer));\n                }\n                if (observer.complete) {\n                    requestCopy.complete.push(observer.complete.bind(observer));\n                }\n                if (isFirstEnqueuedRequest) {\n                    _this.scheduleQueueConsumption(key);\n                }\n                else if (_this.batchDebounce) {\n                    clearTimeout(_this.scheduledBatchTimer);\n                    _this.scheduleQueueConsumption(key);\n                }\n                if (batch.size === _this.batchMax) {\n                    _this.consumeQueue(key);\n                }\n                return function () {\n                    var _a;\n                    if (requestCopy.subscribers.delete(observer) &&\n                        requestCopy.subscribers.size < 1) {\n                        if (batch.delete(requestCopy) && batch.size < 1) {\n                            _this.consumeQueue(key);\n                            (_a = batch.subscription) === null || _a === void 0 ? void 0 : _a.unsubscribe();\n                        }\n                    }\n                };\n            });\n        }\n        return requestCopy.observable;\n    };\n    OperationBatcher.prototype.consumeQueue = function (key) {\n        if (key === void 0) { key = ''; }\n        var batch = this.batchesByKey.get(key);\n        this.batchesByKey.delete(key);\n        if (!batch || !batch.size) {\n            return;\n        }\n        var operations = [];\n        var forwards = [];\n        var observables = [];\n        var nexts = [];\n        var errors = [];\n        var completes = [];\n        batch.forEach(function (request) {\n            operations.push(request.operation);\n            forwards.push(request.forward);\n            observables.push(request.observable);\n            nexts.push(request.next);\n            errors.push(request.error);\n            completes.push(request.complete);\n        });\n        var batchedObservable = this.batchHandler(operations, forwards) || Observable.of();\n        var onError = function (error) {\n            errors.forEach(function (rejecters) {\n                if (rejecters) {\n                    rejecters.forEach(function (e) { return e(error); });\n                }\n            });\n        };\n        batch.subscription = batchedObservable.subscribe({\n            next: function (results) {\n                if (!Array.isArray(results)) {\n                    results = [results];\n                }\n                if (nexts.length !== results.length) {\n                    var error = new Error(\"server returned results with length \".concat(results.length, \", expected length of \").concat(nexts.length));\n                    error.result = results;\n                    return onError(error);\n                }\n                results.forEach(function (result, index) {\n                    if (nexts[index]) {\n                        nexts[index].forEach(function (next) { return next(result); });\n                    }\n                });\n            },\n            error: onError,\n            complete: function () {\n                completes.forEach(function (complete) {\n                    if (complete) {\n                        complete.forEach(function (c) { return c(); });\n                    }\n                });\n            },\n        });\n        return observables;\n    };\n    OperationBatcher.prototype.scheduleQueueConsumption = function (key) {\n        var _this = this;\n        this.scheduledBatchTimer = setTimeout(function () {\n            _this.consumeQueue(key);\n        }, this.batchInterval);\n    };\n    return OperationBatcher;\n}());\nexport { OperationBatcher };\n//# sourceMappingURL=batching.js.map","import { __extends } from \"tslib\";\nimport { ApolloLink } from '../core';\nimport { OperationBatcher } from './batching';\nexport { OperationBatcher } from './batching';\nvar BatchLink = (function (_super) {\n    __extends(BatchLink, _super);\n    function BatchLink(fetchParams) {\n        var _this = _super.call(this) || this;\n        var _a = fetchParams || {}, batchDebounce = _a.batchDebounce, _b = _a.batchInterval, batchInterval = _b === void 0 ? 10 : _b, _c = _a.batchMax, batchMax = _c === void 0 ? 0 : _c, _d = _a.batchHandler, batchHandler = _d === void 0 ? function () { return null; } : _d, _e = _a.batchKey, batchKey = _e === void 0 ? function () { return ''; } : _e;\n        _this.batcher = new OperationBatcher({\n            batchDebounce: batchDebounce,\n            batchInterval: batchInterval,\n            batchMax: batchMax,\n            batchHandler: batchHandler,\n            batchKey: batchKey,\n        });\n        if (fetchParams.batchHandler.length <= 1) {\n            _this.request = function (operation) { return _this.batcher.enqueueRequest({ operation: operation }); };\n        }\n        return _this;\n    }\n    BatchLink.prototype.request = function (operation, forward) {\n        return this.batcher.enqueueRequest({\n            operation: operation,\n            forward: forward,\n        });\n    };\n    return BatchLink;\n}(ApolloLink));\nexport { BatchLink };\n//# 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