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// Base class for npm commands
const usageUtil = require('./utils/usage.js')
const ConfigDefinitions = require('./utils/config/definitions.js')
const getWorkspaces = require('./workspaces/get-workspaces.js')

class BaseCommand {
  constructor (npm) {
    this.wrapWidth = 80
    this.npm = npm
  }

  get name () {
    return this.constructor.name
  }

  get description () {
    return this.constructor.description
  }

  get usage () {
    let usage = `npm ${this.constructor.name}\n\n`
    if (this.constructor.description)
      usage = `${usage}${this.constructor.description}\n\n`

    usage = `${usage}Usage:\n`
    if (!this.constructor.usage)
      usage = `${usage}npm ${this.constructor.name}`
    else
      usage = `${usage}${this.constructor.usage.map(u => `npm ${this.constructor.name} ${u}`).join('\n')}`

    if (this.constructor.params)
      usage = `${usage}\n\nOptions:\n${this.wrappedParams}`

    // Mostly this just appends aliases, this could be more clear
    usage = usageUtil(this.constructor.name, usage)
    usage = `${usage}\n\nRun "npm help ${this.constructor.name}" for more info`
    return usage
  }

  get wrappedParams () {
    let results = ''
    let line = ''

    for (const param of this.constructor.params) {
      const usage = `[${ConfigDefinitions[param].usage}]`
      if (line.length && (line.length + usage.length) > this.wrapWidth) {
        results = [results, line].filter(Boolean).join('\n')
        line = ''
      }
      line = [line, usage].filter(Boolean).join(' ')
    }
    results = [results, line].filter(Boolean).join('\n')
    return results
  }

  usageError (prefix = '') {
    if (prefix)
      prefix += '\n\n'
    return Object.assign(new Error(`\nUsage: ${prefix}${this.usage}`), {
      code: 'EUSAGE',
    })
  }

  async execWorkspaces (args, filters) {
    throw Object.assign(
      new Error('This command does not support workspaces.'),
      { code: 'ENOWORKSPACES' }
    )
  }

  async setWorkspaces (filters) {
    if (this.isArboristCmd)
      this.includeWorkspaceRoot = false

    const ws = await getWorkspaces(filters, {
      path: this.npm.localPrefix,
      includeWorkspaceRoot: this.includeWorkspaceRoot,
    })
    this.workspaces = ws
    this.workspaceNames = [...ws.keys()]
    this.workspacePaths = [...ws.values()]
  }
}
module.exports = BaseCommand