{"ast":null,"code":"import { ByteQueue } from \"../byte_queue.js\";\nimport { Cursor } from \"../cursor.js\";\nimport * as jsond from \"../encoding/json/decode.js\";\nimport * as protobufd from \"../encoding/protobuf/decode.js\";\nimport { ClientError, ClosedError, ProtoError, InternalError } from \"../errors.js\";\nimport { impossible } from \"../util.js\";\nimport { CursorRespBody as json_CursorRespBody } from \"./json_decode.js\";\nimport { CursorRespBody as protobuf_CursorRespBody } from \"./protobuf_decode.js\";\nimport { CursorEntry as json_CursorEntry } from \"../shared/json_decode.js\";\nimport { CursorEntry as protobuf_CursorEntry } from \"../shared/protobuf_decode.js\";\nexport class HttpCursor extends Cursor {\n  #stream;\n  #encoding;\n  #reader;\n  #queue;\n  #closed;\n  #done;\n  /** @private */\n  constructor(stream, encoding) {\n    super();\n    this.#stream = stream;\n    this.#encoding = encoding;\n    this.#reader = undefined;\n    this.#queue = new ByteQueue(16 * 1024);\n    this.#closed = undefined;\n    this.#done = false;\n  }\n  async open(response) {\n    if (response.body === null) {\n      throw new ProtoError(\"No response body for cursor request\");\n    }\n    this.#reader = response.body.getReader();\n    const respBody = await this.#nextItem(json_CursorRespBody, protobuf_CursorRespBody);\n    if (respBody === undefined) {\n      throw new ProtoError(\"Empty response to cursor request\");\n    }\n    return respBody;\n  }\n  /** Fetch the next entry from the cursor. */\n  next() {\n    return this.#nextItem(json_CursorEntry, protobuf_CursorEntry);\n  }\n  /** Close the cursor. */\n  close() {\n    this._setClosed(new ClientError(\"Cursor was manually closed\"));\n  }\n  /** @private */\n  _setClosed(error) {\n    if (this.#closed !== undefined) {\n      return;\n    }\n    this.#closed = error;\n    this.#stream._cursorClosed(this);\n    if (this.#reader !== undefined) {\n      this.#reader.cancel();\n    }\n  }\n  /** True if the cursor is closed. */\n  get closed() {\n    return this.#closed !== undefined;\n  }\n  async #nextItem(jsonFun, protobufDef) {\n    for (;;) {\n      if (this.#done) {\n        return undefined;\n      } else if (this.#closed !== undefined) {\n        throw new ClosedError(\"Cursor is closed\", this.#closed);\n      }\n      if (this.#encoding === \"json\") {\n        const jsonData = this.#parseItemJson();\n        if (jsonData !== undefined) {\n          const jsonText = new TextDecoder().decode(jsonData);\n          const jsonValue = JSON.parse(jsonText);\n          return jsond.readJsonObject(jsonValue, jsonFun);\n        }\n      } else if (this.#encoding === \"protobuf\") {\n        const protobufData = this.#parseItemProtobuf();\n        if (protobufData !== undefined) {\n          return protobufd.readProtobufMessage(protobufData, protobufDef);\n        }\n      } else {\n        throw impossible(this.#encoding, \"Impossible encoding\");\n      }\n      if (this.#reader === undefined) {\n        throw new InternalError(\"Attempted to read from HTTP cursor before it was opened\");\n      }\n      const {\n        value,\n        done\n      } = await this.#reader.read();\n      if (done && this.#queue.length === 0) {\n        this.#done = true;\n      } else if (done) {\n        throw new ProtoError(\"Unexpected end of cursor stream\");\n      } else {\n        this.#queue.push(value);\n      }\n    }\n  }\n  #parseItemJson() {\n    const data = this.#queue.data();\n    const newlineByte = 10;\n    const newlinePos = data.indexOf(newlineByte);\n    if (newlinePos < 0) {\n      return undefined;\n    }\n    const jsonData = data.slice(0, newlinePos);\n    this.#queue.shift(newlinePos + 1);\n    return jsonData;\n  }\n  #parseItemProtobuf() {\n    const data = this.#queue.data();\n    let varintValue = 0;\n    let varintLength = 0;\n    for (;;) {\n      if (varintLength >= data.byteLength) {\n        return undefined;\n      }\n      const byte = data[varintLength];\n      varintValue |= (byte & 0x7f) << 7 * varintLength;\n      varintLength += 1;\n      if (!(byte & 0x80)) {\n        break;\n      }\n    }\n    if (data.byteLength < varintLength + varintValue) {\n      return undefined;\n    }\n    const protobufData = data.slice(varintLength, varintLength + varintValue);\n    this.#queue.shift(varintLength + varintValue);\n    return protobufData;\n  }\n}","map":{"version":3,"names":["ByteQueue","Cursor","jsond","protobufd","ClientError","ClosedError","ProtoError","InternalError","impossible","CursorRespBody","json_CursorRespBody","protobuf_CursorRespBody","CursorEntry","json_CursorEntry","protobuf_CursorEntry","HttpCursor","stream","encoding","reader","queue","closed","done","constructor","undefined","open","response","body","getReader","respBody","nextItem","next","close","_setClosed","error","_cursorClosed","cancel","#nextItem","jsonFun","protobufDef","jsonData","parseItemJson","jsonText","TextDecoder","decode","jsonValue","JSON","parse","readJsonObject","protobufData","parseItemProtobuf","readProtobufMessage","value","read","length","push","#parseItemJson","data","newlineByte","newlinePos","indexOf","slice","shift","#parseItemProtobuf","varintValue","varintLength","byteLength","byte"],"sources":["/Users/shoofle/Projects/the-forest/node_modules/@libsql/hrana-client/lib-esm/http/cursor.js"],"sourcesContent":["import { ByteQueue } 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