| 1 | {"version":3,"file":"asyncMap.js","sourceRoot":"","sources":["../../../src/utilities/observables/asyncMap.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,UAAU,EAAY,MAAM,cAAc,CAAC;AAIpD,MAAM,UAAU,QAAQ,CACtB,UAAyB,EACzB,KAAuC,EACvC,OAA4C;IAE5C,OAAO,IAAI,UAAU,CAAI,UAAA,QAAQ;QACvB,IAAA,IAAI,GAAsB,QAAQ,KAA9B,EAAE,KAAK,GAAe,QAAQ,MAAvB,EAAE,QAAQ,GAAK,QAAQ,SAAb,CAAc;QAC3C,IAAI,mBAAmB,GAAG,CAAC,CAAC;QAC5B,IAAI,SAAS,GAAG,KAAK,CAAC;QACtB,IAAI,YAAY,GAAG;YAIjB,IAAI,YAAC,QAAmB;gBACtB,OAAO,IAAI,OAAO,CAAC,UAAA,OAAO,IAAI,OAAA,OAAO,CAAC,QAAQ,EAAE,CAAC,EAAnB,CAAmB,CAAC,CAAC;YACrD,CAAC;SACe,CAAC;QAEnB,SAAS,YAAY,CACnB,QAAuC,EACvC,QAAoC;YAEpC,IAAI,QAAQ,EAAE;gBACZ,OAAO,UAAA,GAAG;oBACR,EAAE,mBAAmB,CAAC;oBACtB,IAAM,IAAI,GAAG,cAAM,OAAA,QAAQ,CAAC,GAAG,CAAC,EAAb,CAAa,CAAC;oBACjC,YAAY,GAAG,YAAY,CAAC,IAAI,CAAC,IAAI,EAAE,IAAI,CAAC,CAAC,IAAI,CAC/C,UAAA,MAAM;wBACJ,EAAE,mBAAmB,CAAC;wBACtB,IAAI,IAAI,IAAI,CAAC,IAAI,CAAC,QAAQ,EAAE,MAAM,CAAC,CAAC;wBACpC,IAAI,SAAS,EAAE;4BACb,OAAO,CAAC,QAAS,EAAE,CAAC;yBACrB;oBACH,CAAC,EACD,UAAA,KAAK;wBACH,EAAE,mBAAmB,CAAC;wBACtB,MAAM,KAAK,CAAC;oBACd,CAAC,CACF,CAAC,KAAK,CAAC,UAAA,MAAM;wBACZ,KAAK,IAAI,KAAK,CAAC,IAAI,CAAC,QAAQ,EAAE,MAAM,CAAC,CAAC;oBACxC,CAAC,CAAC,CAAC;gBACL,CAAC,CAAC;aACH;iBAAM;gBACL,OAAO,UAAA,GAAG,IAAI,OAAA,QAAQ,IAAI,QAAQ,CAAC,IAAI,CAAC,QAAQ,EAAE,GAAG,CAAC,EAAxC,CAAwC,CAAC;aACxD;QACH,CAAC;QAED,IAAM,OAAO,GAAgB;YAC3B,IAAI,EAAE,YAAY,CAAC,KAAK,EAAE,IAAI,CAAC;YAC/B,KAAK,EAAE,YAAY,CAAC,OAAO,EAAE,KAAK,CAAC;YACnC,QAAQ;gBACN,SAAS,GAAG,IAAI,CAAC;gBACjB,IAAI,CAAC,mBAAmB,EAAE;oBACxB,QAAQ,IAAI,QAAQ,CAAC,IAAI,CAAC,QAAQ,CAAC,CAAC;iBACrC;YACH,CAAC;SACF,CAAC;QAEF,IAAM,GAAG,GAAG,UAAU,CAAC,SAAS,CAAC,OAAO,CAAC,CAAC;QAC1C,OAAO,cAAM,OAAA,GAAG,CAAC,WAAW,EAAE,EAAjB,CAAiB,CAAC;IACjC,CAAC,CAAC,CAAC;AACL,CAAC","sourcesContent":["import { Observable, Observer } from \"./Observable\";\n\n// Like Observable.prototype.map, except that the mapping function can\n// optionally return a Promise (or be async).\nexport function asyncMap<V, R>(\n observable: Observable<V>,\n mapFn: (value: V) => R | PromiseLike<R>,\n catchFn?: (error: any) => R | PromiseLike<R>,\n): Observable<R> {\n return new Observable<R>(observer => {\n const { next, error, complete } = observer;\n let activeCallbackCount = 0;\n let completed = false;\n let promiseQueue = {\n // Normally we would initialize promiseQueue to Promise.resolve(), but\n // in this case, for backwards compatibility, we need to be careful to\n // invoke the first callback synchronously.\n then(callback: () => any) {\n return new Promise(resolve => resolve(callback()));\n },\n } as Promise<void>;\n\n function makeCallback(\n examiner: typeof mapFn | typeof catchFn,\n delegate: typeof next | typeof error,\n ): (arg: any) => void {\n if (examiner) {\n return arg => {\n ++activeCallbackCount;\n const both = () => examiner(arg);\n promiseQueue = promiseQueue.then(both, both).then(\n result => {\n --activeCallbackCount;\n next && next.call(observer, result);\n if (completed) {\n handler.complete!();\n }\n },\n error => {\n --activeCallbackCount;\n throw error;\n },\n ).catch(caught => {\n error && error.call(observer, caught);\n });\n };\n } else {\n return arg => delegate && delegate.call(observer, arg);\n }\n }\n\n const handler: Observer<V> = {\n next: makeCallback(mapFn, next),\n error: makeCallback(catchFn, error),\n complete() {\n completed = true;\n if (!activeCallbackCount) {\n complete && complete.call(observer);\n }\n },\n };\n\n const sub = observable.subscribe(handler);\n return () => sub.unsubscribe();\n });\n}\n"]} |