31 lines
997 B
JavaScript
31 lines
997 B
JavaScript
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/*
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Copyright 2018 New Vector Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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module.exports = class LogBuffer {
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constructor(page, eventName, eventMapper, reduceAsync=false, initialValue = "") {
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this.buffer = initialValue;
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page.on(eventName, (arg) => {
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const result = eventMapper(arg);
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if (reduceAsync) {
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result.then((r) => this.buffer += r);
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}
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else {
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this.buffer += result;
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}
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});
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}
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}
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