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author | RaindropsSys <contact@minteck.org> | 2023-04-24 14:03:36 +0200 |
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committer | RaindropsSys <contact@minteck.org> | 2023-04-24 14:03:36 +0200 |
commit | 633c92eae865e957121e08de634aeee11a8b3992 (patch) | |
tree | 09d881bee1dae0b6eee49db1dfaf0f500240606c /includes/external/matrix/node_modules/asynckit/lib/streamify.js | |
parent | c4657e4509733699c0f26a3c900bab47e915d5a0 (diff) | |
download | pluralconnect-633c92eae865e957121e08de634aeee11a8b3992.tar.gz pluralconnect-633c92eae865e957121e08de634aeee11a8b3992.tar.bz2 pluralconnect-633c92eae865e957121e08de634aeee11a8b3992.zip |
Updated 18 files, added 1692 files and deleted includes/system/compare.inc (automated)
Diffstat (limited to 'includes/external/matrix/node_modules/asynckit/lib/streamify.js')
-rw-r--r-- | includes/external/matrix/node_modules/asynckit/lib/streamify.js | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/includes/external/matrix/node_modules/asynckit/lib/streamify.js b/includes/external/matrix/node_modules/asynckit/lib/streamify.js new file mode 100644 index 0000000..f56a1c9 --- /dev/null +++ b/includes/external/matrix/node_modules/asynckit/lib/streamify.js @@ -0,0 +1,141 @@ +var async = require('./async.js'); + +// API +module.exports = { + iterator: wrapIterator, + callback: wrapCallback +}; + +/** + * Wraps iterators with long signature + * + * @this ReadableAsyncKit# + * @param {function} iterator - function to wrap + * @returns {function} - wrapped function + */ +function wrapIterator(iterator) +{ + var stream = this; + + return function(item, key, cb) + { + var aborter + , wrappedCb = async(wrapIteratorCallback.call(stream, cb, key)) + ; + + stream.jobs[key] = wrappedCb; + + // it's either shortcut (item, cb) + if (iterator.length == 2) + { + aborter = iterator(item, wrappedCb); + } + // or long format (item, key, cb) + else + { + aborter = iterator(item, key, wrappedCb); + } + + return aborter; + }; +} + +/** + * Wraps provided callback function + * allowing to execute snitch function before + * real callback + * + * @this ReadableAsyncKit# + * @param {function} callback - function to wrap + * @returns {function} - wrapped function + */ +function wrapCallback(callback) +{ + var stream = this; + + var wrapped = function(error, result) + { + return finisher.call(stream, error, result, callback); + }; + + return wrapped; +} + +/** + * Wraps provided iterator callback function + * makes sure snitch only called once, + * but passes secondary calls to the original callback + * + * @this ReadableAsyncKit# + * @param {function} callback - callback to wrap + * @param {number|string} key - iteration key + * @returns {function} wrapped callback + */ +function wrapIteratorCallback(callback, key) +{ + var stream = this; + + return function(error, output) + { + // don't repeat yourself + if (!(key in stream.jobs)) + { + callback(error, output); + return; + } + + // clean up jobs + delete stream.jobs[key]; + + return streamer.call(stream, error, {key: key, value: output}, callback); + }; +} + +/** + * Stream wrapper for iterator callback + * + * @this ReadableAsyncKit# + * @param {mixed} error - error response + * @param {mixed} output - iterator output + * @param {function} callback - callback that expects iterator results + */ +function streamer(error, output, callback) +{ + if (error && !this.error) + { + this.error = error; + this.pause(); + this.emit('error', error); + // send back value only, as expected + callback(error, output && output.value); + return; + } + + // stream stuff + this.push(output); + + // back to original track + // send back value only, as expected + callback(error, output && output.value); +} + +/** + * Stream wrapper for finishing callback + * + * @this ReadableAsyncKit# + * @param {mixed} error - error response + * @param {mixed} output - iterator output + * @param {function} callback - callback that expects final results + */ +function finisher(error, output, callback) +{ + // signal end of the stream + // only for successfully finished streams + if (!error) + { + this.push(null); + } + + // back to original track + callback(error, output); +} |