{"version":3,"file":"xml-stream.js","names":["_","require","utils","OPEN_ANGLE","CLOSE_ANGLE","OPEN_ANGLE_SLASH","CLOSE_SLASH_ANGLE","pushAttribute","xml","name","value","push","xmlEncode","toString","pushAttributes","attributes","tmp","each","undefined","join","XmlStream","constructor","_xml","_stack","_rollbacks","tos","length","cursor","openXml","docAttributes","openNode","parent","open","leaf","addAttribute","Error","addAttributes","attrs","writeText","text","writeXml","closeNode","node","pop","leafNode","closeAll","addRollback","stack","commit","rollback","r","splice","StdDocAttributes","version","encoding","standalone","module","exports"],"sources":["../../../lib/utils/xml-stream.js"],"sourcesContent":["const _ = require('./under-dash');\n\nconst utils = require('./utils');\n\n// constants\nconst OPEN_ANGLE = '<';\nconst CLOSE_ANGLE = '>';\nconst OPEN_ANGLE_SLASH = '</';\nconst CLOSE_SLASH_ANGLE = '/>';\n\nfunction pushAttribute(xml, name, value) {\n  xml.push(` ${name}=\"${utils.xmlEncode(value.toString())}\"`);\n}\nfunction pushAttributes(xml, attributes) {\n  if (attributes) {\n    const tmp = [];\n    _.each(attributes, (value, name) => {\n      if (value !== undefined) {\n        pushAttribute(tmp, name, value);\n      }\n    });\n    xml.push(tmp.join(\"\"));\n  }\n}\n\nclass XmlStream {\n  constructor() {\n    this._xml = [];\n    this._stack = [];\n    this._rollbacks = [];\n  }\n\n  get tos() {\n    return this._stack.length ? this._stack[this._stack.length - 1] : undefined;\n  }\n\n  get cursor() {\n    // handy way to track whether anything has been added\n    return this._xml.length;\n  }\n\n  openXml(docAttributes) {\n    const xml = this._xml;\n    // <?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n    xml.push('<?xml');\n    pushAttributes(xml, docAttributes);\n    xml.push('?>\\n');\n  }\n\n  openNode(name, attributes) {\n    const parent = this.tos;\n    const xml = this._xml;\n    if (parent && this.open) {\n      xml.push(CLOSE_ANGLE);\n    }\n\n    this._stack.push(name);\n\n    // start streaming node\n    xml.push(OPEN_ANGLE);\n    xml.push(name);\n    pushAttributes(xml, attributes);\n    this.leaf = true;\n    this.open = true;\n  }\n\n  addAttribute(name, value) {\n    if (!this.open) {\n      throw new Error('Cannot write attributes to node if it is not open');\n    }\n    if (value !== undefined) {\n      pushAttribute(this._xml, name, value);\n    }\n  }\n\n  addAttributes(attrs) {\n    if (!this.open) {\n      throw new Error('Cannot write attributes to node if it is not open');\n    }\n    pushAttributes(this._xml, attrs);\n  }\n\n  writeText(text) {\n    const xml = this._xml;\n    if (this.open) {\n      xml.push(CLOSE_ANGLE);\n      this.open = false;\n    }\n    this.leaf = false;\n    xml.push(utils.xmlEncode(text.toString()));\n  }\n\n  writeXml(xml) {\n    if (this.open) {\n      this._xml.push(CLOSE_ANGLE);\n      this.open = false;\n    }\n    this.leaf = false;\n    this._xml.push(xml);\n  }\n\n  closeNode() {\n    const node = this._stack.pop();\n    const xml = this._xml;\n    if (this.leaf) {\n      xml.push(CLOSE_SLASH_ANGLE);\n    } else {\n      xml.push(OPEN_ANGLE_SLASH);\n      xml.push(node);\n      xml.push(CLOSE_ANGLE);\n    }\n    this.open = false;\n    this.leaf = false;\n  }\n\n  leafNode(name, attributes, text) {\n    this.openNode(name, attributes);\n    if (text !== undefined) {\n      // zeros need to be written\n      this.writeText(text);\n    }\n    this.closeNode();\n  }\n\n  closeAll() {\n    while (this._stack.length) {\n      this.closeNode();\n    }\n  }\n\n  addRollback() {\n    this._rollbacks.push({\n      xml: this._xml.length,\n      stack: this._stack.length,\n      leaf: this.leaf,\n      open: this.open,\n    });\n    return this.cursor;\n  }\n\n  commit() {\n    this._rollbacks.pop();\n  }\n\n  rollback() {\n    const r = this._rollbacks.pop();\n    if (this._xml.length > r.xml) {\n      this._xml.splice(r.xml, this._xml.length - 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