@interopio/gateway/dist/metrics/publisher/file.cjs.map

[](https://www.npmjs.com/package/@interopio/gateway)

{
  "version": 3,
  "sources": ["../../../src/metrics/publisher/file.ts"],
  "sourcesContent": ["import * as fs from 'fs';\nimport * as path from 'path';\nimport {PublishCommand} from './types.js';\nimport {IOGateway} from '../../../gateway';\nimport {FilePublisherConfig, FileAppender} from '../../../types/metrics/publisher/file';\n\nclass JsonFileAppender implements FileAppender {\n    private stream: fs.WriteStream | undefined;\n\n    constructor(private readonly logger: IOGateway.Logging.Logger) {\n    }\n\n    async open(location: string, append: boolean = false) {\n        const dir = path.dirname(location);\n        await new Promise<void>((resolve, reject) => fs.mkdir(dir, {recursive: true}, (err) => {\n            if (err) {\n                this.logger.error(`error creating directory ${dir}`, err);\n                reject(err);\n            } else {\n                resolve();\n            }\n        }));\n        this.stream = fs.createWriteStream(location, {flags: append ? 'a' : 'w'});\n        this.stream.on('error', (err) => {\n            this.logger.warn(`write stream error. location: ${location}, append: ${append}`, err);\n        });\n        return this;\n    }\n\n    async write(msg: IOGateway.Metrics.Update) {\n        await new Promise<void>((resolve, reject) => {\n            if (this.stream) {\n                if (this.stream.write(JSON.stringify(msg) + '\\n', (err) => {\n                    if (err) {\n                        this.logger.error(`failed to write json line in current write stream`, err);\n                    }\n                })) {\n                    resolve();\n                } else {\n                    // wait for drain\n                    this.stream.once('drain', () => {\n                        resolve();\n                    });\n                }\n            } else {\n                reject(new Error(`no stream - did you call open()`));\n            }\n        });\n        return this;\n    }\n\n    close() {\n        if (this.stream) {\n            this.stream.end();\n            this.stream = undefined;\n        }\n    }\n}\n\nexport const name = 'file';\n\nexport function jsonFileAppender(logger: IOGateway.Logging.Logger): FileAppender {\n    return new JsonFileAppender(logger);\n}\nexport function create(config: FilePublisherConfig, logger: IOGateway.Logging.Logger) {\n    const appender = jsonFileAppender(logger);\n    return async (msg: PublishCommand) => {\n        if (msg === 'start') {\n            await appender.open(config.location, config.append ?? false);\n            return appender;\n        } else if (msg === 'stop') {\n            return (a: JsonFileAppender) => {\n                a.close();\n            };\n        } else {\n            const skip = !(config.status ?? false) && msg.status;\n            if (!skip) {\n                await appender.write(msg);\n            }\n        }\n    };\n}\n"],
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  "names": ["file_exports", "__export", "create", "jsonFileAppender", "name", "__toCommonJS", "fs", "path", "JsonFileAppender", "logger", "location", "append", "dir", "resolve", "reject", "err", "msg", "config", "appender", "a"]
}