commit fb446bfa4d557c9526a446be567a982514b7878a Author: Sven Slootweg Date: Wed Aug 5 12:57:43 2020 +0200 Initial commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..3c3629e --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +node_modules diff --git a/README.md b/README.md new file mode 100644 index 0000000..79c9c5d --- /dev/null +++ b/README.md @@ -0,0 +1,5 @@ +# @validatem/is-node-stream + +Documentation for this module has not been written yet. By the time it reaches 1.0.0, it will have full documentation. + +In the meantime, check out the `example.js` file in the repository for a usage demonstration. diff --git a/example.js b/example.js new file mode 100644 index 0000000..c0fffeb --- /dev/null +++ b/example.js @@ -0,0 +1,23 @@ +"use strict"; + +const fs = require("fs"); +const stream = require("stream"); +const { validateValue } = require("@validatem/core"); +const isNodeStream = require("./"); + +let readable = fs.createReadStream("/dev/zero"); +let writable = fs.createWriteStream("/dev/null"); +let transform = new stream.Transform({ transform: (chunk, encoding, callback) => callback(chunk) }); + +console.log(validateValue(readable, [ isNodeStream.readable ])); // ReadStream { ... } + +console.log(validateValue(writable, [ isNodeStream.writable ])); // WriteStream { ... } + +console.log(validateValue(transform, [ isNodeStream.transform ])); // Transform { ... } + +console.log(validateValue(transform, [ isNodeStream.anyReadable ])); // Transform { ... } + +console.log(validateValue(transform, [ isNodeStream.readable ])); /* + AggregrateValidationError: One or more validation errors occurred at 'Object.' in is-node-stream/example.js, at line 20 (): + - Must be a Node.js Readable stream +*/ diff --git a/index.js b/index.js new file mode 100644 index 0000000..2f0aca7 --- /dev/null +++ b/index.js @@ -0,0 +1,47 @@ +"use strict"; + +const ValidationError = require("@validatem/error"); +const isStream = require("is-stream"); + +module.exports = { + any: function (value) { + if (!isStream(value)) { + return new ValidationError("Must be a Node.js stream"); + } + }, + readable: function (value) { + if (!isStream.readable(value) || isStream.writable(value)) { + return new ValidationError("Must be a Node.js Readable stream"); + } + }, + anyReadable: function (value) { + if (!isStream.readable(value)) { + return new ValidationError("Must be a Node.js stream that can be read from"); + } + }, + writable: function (value) { + if (!isStream.writable(value) || isStream.readable(value)) { + return new ValidationError("Must be a Node.js Writable stream"); + } + }, + anyWritable: function (value) { + if (!isStream.writable(value)) { + return new ValidationError("Must be a Node.js stream that can be written to"); + } + }, + duplex: function (value) { + if (!isStream.duplex(value) || isStream.transform(value)) { + return new ValidationError("Must be a Node.js Duplex stream"); + } + }, + anyDuplex: function (value) { + if (!isStream.duplex(value)) { + return new ValidationError("Must be a Node.js Duplex-based stream (eg. a Transform stream)"); + } + }, + transform: function (value) { + if (!isStream.transform(value)) { + return new ValidationError("Must be a Node.js Transform stream"); + } + } +}; diff --git a/package.json b/package.json new file mode 100644 index 0000000..621229c --- /dev/null +++ b/package.json @@ -0,0 +1,20 @@ +{ + "name": "@validatem/is-node-stream", + "description": "Validatem validator for ensuring that a value is a Node.js stream", + "keywords": [ + "validatem", + "validator" + ], + "version": "0.1.0", + "main": "index.js", + "repository": "http://git.cryto.net/validatem/is-node-stream.git", + "author": "Sven Slootweg ", + "license": "WTFPL OR CC0-1.0", + "dependencies": { + "@validatem/error": "^1.0.0", + "is-stream": "^2.0.0" + }, + "devDependencies": { + "@validatem/core": "^0.3.1" + } +} diff --git a/yarn.lock b/yarn.lock new file mode 100644 index 0000000..f277348 --- /dev/null +++ b/yarn.lock @@ -0,0 +1,228 @@ +# THIS IS AN AUTOGENERATED FILE. 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