78 lines
2.1 KiB
JavaScript
78 lines
2.1 KiB
JavaScript
/**
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* Applies arbitrary function to response data
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*
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* Copyright (C) 2010-2019 R-T Specialty, LLC.
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*
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* This file is part of the Liza Data Collection Framework
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*
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* Liza is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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var Trait = require( 'easejs' ).Trait,
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DataApi = require( '../DataApi' );
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module.exports = Trait( 'ResponseApply' )
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.implement( DataApi )
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.extend(
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{
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/**
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* Function to apply to data
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*
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* @type {function(*)}
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*/
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'private _dataf': () => {},
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/**
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* Initialize with function to apply to return data
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*
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* @param {function(*)} req_callback return data function
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*/
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__mixin( dataf )
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{
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if ( typeof dataf !== 'function' )
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{
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throw TypeError( 'expected function for #request callback' );
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}
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this._dataf = dataf;
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},
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/**
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* Apply function to response
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*
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* The function provided during mixin will be applied to the response
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* data to produce a new response.
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*
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* It is not recommended to use this trait for complex transformations;
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* a new trait should be created instead.
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*
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* @param {string} data binary data to transmit
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* @param {function(?Error,*)} callback continuation upon reply
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*
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* @return {DataApi} self
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*/
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'virtual abstract override public request'( data, callback )
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{
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this.__super( data, ( e, retdata ) =>
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{
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callback( e, this._dataf( retdata ) );
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} );
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return this;
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},
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} );
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