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node_modules/mute-stream/lib/index.js

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+const Stream = require('stream')
+
+class MuteStream extends Stream {
+  #isTTY = null
+
+  constructor (opts = {}) {
+    super(opts)
+    this.writable = this.readable = true
+    this.muted = false
+    this.on('pipe', this._onpipe)
+    this.replace = opts.replace
+
+    // For readline-type situations
+    // This much at the start of a line being redrawn after a ctrl char
+    // is seen (such as backspace) won't be redrawn as the replacement
+    this._prompt = opts.prompt || null
+    this._hadControl = false
+  }
+
+  #destSrc (key, def) {
+    if (this._dest) {
+      return this._dest[key]
+    }
+    if (this._src) {
+      return this._src[key]
+    }
+    return def
+  }
+
+  #proxy (method, ...args) {
+    if (typeof this._dest?.[method] === 'function') {
+      this._dest[method](...args)
+    }
+    if (typeof this._src?.[method] === 'function') {
+      this._src[method](...args)
+    }
+  }
+
+  get isTTY () {
+    if (this.#isTTY !== null) {
+      return this.#isTTY
+    }
+    return this.#destSrc('isTTY', false)
+  }
+
+  // basically just get replace the getter/setter with a regular value
+  set isTTY (val) {
+    this.#isTTY = val
+  }
+
+  get rows () {
+    return this.#destSrc('rows')
+  }
+
+  get columns () {
+    return this.#destSrc('columns')
+  }
+
+  mute () {
+    this.muted = true
+  }
+
+  unmute () {
+    this.muted = false
+  }
+
+  _onpipe (src) {
+    this._src = src
+  }
+
+  pipe (dest, options) {
+    this._dest = dest
+    return super.pipe(dest, options)
+  }
+
+  pause () {
+    if (this._src) {
+      return this._src.pause()
+    }
+  }
+
+  resume () {
+    if (this._src) {
+      return this._src.resume()
+    }
+  }
+
+  write (c) {
+    if (this.muted) {
+      if (!this.replace) {
+        return true
+      }
+      // eslint-disable-next-line no-control-regex
+      if (c.match(/^\u001b/)) {
+        if (c.indexOf(this._prompt) === 0) {
+          c = c.slice(this._prompt.length)
+          c = c.replace(/./g, this.replace)
+          c = this._prompt + c
+        }
+        this._hadControl = true
+        return this.emit('data', c)
+      } else {
+        if (this._prompt && this._hadControl &&
+          c.indexOf(this._prompt) === 0) {
+          this._hadControl = false
+          this.emit('data', this._prompt)
+          c = c.slice(this._prompt.length)
+        }
+        c = c.toString().replace(/./g, this.replace)
+      }
+    }
+    this.emit('data', c)
+  }
+
+  end (c) {
+    if (this.muted) {
+      if (c && this.replace) {
+        c = c.toString().replace(/./g, this.replace)
+      } else {
+        c = null
+      }
+    }
+    if (c) {
+      this.emit('data', c)
+    }
+    this.emit('end')
+  }
+
+  destroy (...args) {
+    return this.#proxy('destroy', ...args)
+  }
+
+  destroySoon (...args) {
+    return this.#proxy('destroySoon', ...args)
+  }
+
+  close (...args) {
+    return this.#proxy('close', ...args)
+  }
+}
+
+module.exports = MuteStream