'use strict'

const Joi = require('joi')

const parseLinkHeader = require('parse-link-header')

const { renderContributorBadge } = require('../contributor-count')

const { GithubAuthV3Service } = require('./github-auth-service')

const { documentation, errorMessagesFor } = require('./github-helpers')

// All we do is check its length.

const schema = Joi.array().items(Joi.object())

module.exports = class GithubContributors extends GithubAuthV3Service {

static category = 'activity'

static route = {

base: 'github',

pattern: ':variant(contributors|contributors-anon)/:user/:repo',

}

static examples = [

{

title: 'GitHub contributors',

namedParams: {

variant: 'contributors',

user: 'cdnjs',

repo: 'cdnjs',

},

staticPreview: this.render({ contributorCount: 397 }),

documentation,

},

]

static defaultBadgeData = { label: 'contributors' }

static render({ contributorCount }) {

return renderContributorBadge({ contributorCount })

}

async handle({ variant, user, repo }) {

const isAnon = variant === 'contributors-anon'

const { res, buffer } = await this._request({

url: `/repos/${user}/${repo}/contributors`,

options: { qs: { page: '1', per_page: '1', anon: isAnon } },

errorMessages: errorMessagesFor('repo not found'),

})

const parsed = parseLinkHeader(res.headers.link)

let contributorCount

if (parsed === null) {

const json = this._parseJson(buffer)

const contributorInfo = this.constructor._validate(json, schema)

contributorCount = contributorInfo.length

} else {

contributorCount = +parsed.last.page

}

return this.constructor.render({ contributorCount })

}

}