modrinth-code/packages/utils/servers/errors/modrinth-server-error.ts

import { FetchError } from 'ofetch'
import { V1ErrorInfo } from '../types'

export class ModrinthServerError extends Error {
  constructor(
    message: string,
    public readonly statusCode?: number,
    public readonly originalError?: Error,
    public readonly module?: string,
    public readonly v1Error?: V1ErrorInfo,
  ) {
    let errorMessage = message
    let method = 'GET'
    let path = ''

    if (originalError instanceof FetchError) {
      const matches = message.match(/\[([A-Z]+)\]\s+"([^"]+)":/)
      if (matches) {
        method = matches[1]
        path = matches[2].replace(/https?:\/\/[^/]+\/[^/]+\/v\d+\//, '')
      }

      const statusMessage = (() => {
        if (!statusCode) return 'Unknown Error'
        switch (statusCode) {
          case 400:
            return 'Bad Request'
          case 401:
            return 'Unauthorized'
          case 403:
            return 'Forbidden'
          case 404:
            return 'Not Found'
          case 408:
            return 'Request Timeout'
          case 429:
            return 'Too Many Requests'
          case 500:
            return 'Internal Server Error'
          case 502:
            return 'Bad Gateway'
          case 503:
            return 'Service Unavailable'
          case 504:
            return 'Gateway Timeout'
          default:
            return `HTTP ${statusCode}`
        }
      })()

      errorMessage = `[${method}] ${statusMessage} (${statusCode}) while fetching ${path}${module ? ` in ${module}` : ''}`
    } else {
      errorMessage = `${message}${statusCode ? ` (${statusCode})` : ''}${module ? ` in ${module}` : ''}`
    }

    super(errorMessage)
    this.name = 'PyroServersFetchError'
  }
}