{"version":3,"file":"env-change-token-parser.js","names":["_collation","require","_token","_helpers","types","name","event","_readNewAndOldValue","buf","offset","length","type","newValue","value","readBVarChar","oldValue","Result","PacketSizeEnvChangeToken","parseInt","DatabaseEnvChangeToken","LanguageEnvChangeToken","CharsetEnvChangeToken","DatabaseMirroringPartnerEnvChangeToken","Error","readBVarByte","newCollation","Collation","fromBuffer","undefined","oldCollation","CollationChangeToken","BeginTransactionEnvChangeToken","CommitTransactionEnvChangeToken","RollbackTransactionEnvChangeToken","ResetConnectionEnvChangeToken","routePacket","readUsVarByte","protocol","readUInt8","port","readUInt16LE","serverLen","server","toString","RoutingEnvChangeToken","console","error","envChangeParser","_options","tokenLength","NotEnoughDataError","typeNumber","_default","exports","default","module"],"sources":["../../src/token/env-change-token-parser.ts"],"sourcesContent":["import { type ParserOptions } from './stream-parser';\nimport { Collation } from '../collation';\n\nimport {\n DatabaseEnvChangeToken,\n LanguageEnvChangeToken,\n CharsetEnvChangeToken,\n PacketSizeEnvChangeToken,\n BeginTransactionEnvChangeToken,\n CommitTransactionEnvChangeToken,\n RollbackTransactionEnvChangeToken,\n DatabaseMirroringPartnerEnvChangeToken,\n ResetConnectionEnvChangeToken,\n RoutingEnvChangeToken,\n CollationChangeToken,\n type EnvChangeToken\n} from './token';\n\nimport { NotEnoughDataError, readBVarByte, readBVarChar, readUInt16LE, readUInt8, readUsVarByte, Result } from './helpers';\n\nconst types: { [key: number]: { name: string, event?: string }} = {\n 1: {\n name: 'DATABASE',\n event: 'databaseChange'\n },\n 2: {\n name: 'LANGUAGE',\n event: 'languageChange'\n },\n 3: {\n name: 'CHARSET',\n event: 'charsetChange'\n },\n 4: {\n name: 'PACKET_SIZE',\n event: 'packetSizeChange'\n },\n 7: {\n name: 'SQL_COLLATION',\n event: 'sqlCollationChange'\n },\n 8: {\n name: 'BEGIN_TXN',\n event: 'beginTransaction'\n },\n 9: {\n name: 'COMMIT_TXN',\n event: 'commitTransaction'\n },\n 10: {\n name: 'ROLLBACK_TXN',\n event: 'rollbackTransaction'\n },\n 13: {\n name: 'DATABASE_MIRRORING_PARTNER',\n event: 'partnerNode'\n },\n 17: {\n name: 'TXN_ENDED'\n },\n 18: {\n name: 'RESET_CONNECTION',\n event: 'resetConnection'\n },\n 20: {\n name: 'ROUTING_CHANGE',\n event: 'routingChange'\n }\n};\n\nfunction _readNewAndOldValue(buf: Buffer, offset: number, length: number, type: { name: string, event?: string }): Result<EnvChangeToken | undefined> {\n switch (type.name) {\n case 'DATABASE':\n case 'LANGUAGE':\n case 'CHARSET':\n case 'PACKET_SIZE':\n case 'DATABASE_MIRRORING_PARTNER': {\n let newValue;\n ({ offset, value: newValue } = readBVarChar(buf, offset));\n\n let oldValue;\n ({ offset, value: oldValue } = readBVarChar(buf, offset));\n\n switch (type.name) {\n case 'PACKET_SIZE':\n return new Result(new PacketSizeEnvChangeToken(parseInt(newValue), parseInt(oldValue)), offset);\n\n case 'DATABASE':\n return new Result(new DatabaseEnvChangeToken(newValue, oldValue), offset);\n\n case 'LANGUAGE':\n return new Result(new LanguageEnvChangeToken(newValue, oldValue), offset);\n\n case 'CHARSET':\n return new Result(new CharsetEnvChangeToken(newValue, oldValue), offset);\n\n case 'DATABASE_MIRRORING_PARTNER':\n return new Result(new DatabaseMirroringPartnerEnvChangeToken(newValue, oldValue), offset);\n }\n\n throw new Error('unreachable');\n }\n\n case 'SQL_COLLATION':\n case 'BEGIN_TXN':\n case 'COMMIT_TXN':\n case 'ROLLBACK_TXN':\n case 'RESET_CONNECTION': {\n let newValue;\n ({ offset, value: newValue } = readBVarByte(buf, offset));\n\n let oldValue;\n ({ offset, value: oldValue } = readBVarByte(buf, offset));\n\n switch (type.name) {\n case 'SQL_COLLATION': {\n const newCollation = newValue.length ? Collation.fromBuffer(newValue) : undefined;\n const oldCollation = oldValue.length ? Collation.fromBuffer(oldValue) : undefined;\n\n return new Result(new CollationChangeToken(newCollation, oldCollation), offset);\n }\n\n case 'BEGIN_TXN':\n return new Result(new BeginTransactionEnvChangeToken(newValue, oldValue), offset);\n\n case 'COMMIT_TXN':\n return new Result(new CommitTransactionEnvChangeToken(newValue, oldValue), offset);\n\n case 'ROLLBACK_TXN':\n return new Result(new RollbackTransactionEnvChangeToken(newValue, oldValue), offset);\n\n case 'RESET_CONNECTION':\n return new Result(new ResetConnectionEnvChangeToken(newValue, oldValue), offset);\n }\n\n throw new Error('unreachable');\n }\n\n case 'ROUTING_CHANGE': {\n let routePacket;\n ({ offset, value: routePacket } = readUsVarByte(buf, offset));\n\n let oldValue;\n ({ offset, value: oldValue } = readUsVarByte(buf, offset));\n\n // Routing Change:\n // Byte 1: Protocol (must be 0)\n // Bytes 2-3 (USHORT): Port number\n // Bytes 4-5 (USHORT): Length of server data in unicode (2byte chars)\n // Bytes 6-*: Server name in unicode characters\n const protocol = routePacket.readUInt8(0);\n if (protocol !== 0) {\n throw new Error('Unknown protocol byte in routing change event');\n }\n\n const port = routePacket.readUInt16LE(1);\n const serverLen = routePacket.readUInt16LE(3);\n // 2 bytes per char, starting at offset 5\n const server = routePacket.toString('ucs2', 5, 5 + (serverLen * 2));\n\n const newValue = {\n protocol: protocol,\n port: port,\n server: server\n };\n\n return new Result(new RoutingEnvChangeToken(newValue, oldValue), offset);\n }\n\n default: {\n console.error('Tedious > Unsupported ENVCHANGE type ' + type.name);\n\n // skip unknown bytes\n return new Result(undefined, offset + length - 1);\n }\n }\n}\n\nfunction envChangeParser(buf: Buffer, offset: number, _options: ParserOptions): Result<EnvChangeToken | undefined> {\n let tokenLength;\n ({ offset, value: tokenLength } = readUInt16LE(buf, offset));\n\n if (buf.length < offset + tokenLength) {\n throw new NotEnoughDataError(offset + tokenLength);\n }\n\n let typeNumber;\n ({ offset, value: typeNumber } = readUInt8(buf, offset));\n\n const type = types[typeNumber];\n\n if (!type) {\n console.error('Tedious > Unsupported ENVCHANGE type ' + typeNumber);\n return new Result(undefined, offset + tokenLength - 1);\n }\n\n return _readNewAndOldValue(buf, offset, tokenLength, type);\n}\n\nexport default envChangeParser;\nmodule.exports = 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