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#!/usr/bin/env node

/** section: github, internal

* class ApiGenerator

*

* Copyright 2012 Cloud9 IDE, Inc.

*

* This product includes software developed by

* Cloud9 IDE, Inc (http://c9.io).

*

* Author: Mike de Boer <mike@c9.io>

**/

'use strict'

var fs = require('fs')

var pathJoin = require('path').join

var Util = require('../lib/util')

var Mustache = require('mustache')

var typeMap = {

Json: 'string',

String: 'string',

Number: 'number',

Boolean: 'boolean'

}

// XXX: maybe a better idea to update routes.json to include array value types.

function replaceArrayTypes (type, name) {

switch (name) {

case 'scopes':

case 'add_scopes':

case 'remove_scopes':

case 'parents':

case 'assignees':

case 'repositories':

case 'repo_names':

case 'events':

case 'add_events':

case 'remove_events':

case 'contexts':

case 'required_contexts':

case 'maintainers':

case 'reviewers':

case 'team_reviewers':

case 'comments':

case 'labels':

case 'teams':

case 'users':

case 'names':

case 'emails':

if (type === 'Array') {

return 'string[]'

}

}

return type

}

function paramData (key, definition) {

if (definition === null) {

return {}

}

var typeName = typeMap[definition.type] || definition.type

var type = replaceArrayTypes(typeName, key)

var enums = definition.enum

? definition.enum.map(JSON.stringify).join('|')

: null

return {

name: pascalcase(key),

key: key,

required: definition.required,

type: enums || type

}

}

function capitalize (string) {

return string.charAt(0).toUpperCase().concat(string.slice(1))

}

function camelcase (string) {

return string.replace(/(?:-|_)([a-z])/g, function (_, character) {

return capitalize(character)

})

}

function pascalcase (string) {

return capitalize(camelcase(string))

}

function isGlobalParam (name) {

return name.charAt(0) === '$'

}

function isLocalParam (name) {

return !isGlobalParam(name)

}

function entries (object) {

return Object.keys(object).map(function (key) {

return [key, object[key]]

})

}

function combineParamData (params, entry) {

return params.concat(paramData.apply(null, entry))

}

module.exports = function (languageName, templateFile, outputFile) {

var templatePath = pathJoin(__dirname, 'templates', templateFile)

var template = fs.readFileSync(templatePath, 'utf8')

// check routes path

var routesPath = pathJoin(__dirname, '..', 'lib', 'routes.json')

var routes = JSON.parse(fs.readFileSync(routesPath, 'utf8'))

if (!routes.defines) {

Util.log('No routes defined.', 'fatal')

process.exit(1)

}

var defines = routes.defines

var requestHeaders = defines['request-headers']

delete routes.defines

Util.log('Generating ' + languageName + ' types...')

var params = entries(defines.params).reduce(combineParamData, [])

var namespaces = Object.keys(routes).reduce(function (namespaces, namespace) {

var methods = entries(routes[namespace]).reduce(function (methods, entry) {

var unionTypeNames = Object.keys(entry[1].params)

.filter(isGlobalParam)

.reduce(function (params, name) {

return params.concat(pascalcase(name.slice(1)))

}, [])

var ownParams = entries(entry[1].params)

.filter(function (entry) { return isLocalParam(entry[0]) })

.reduce(combineParamData, [])

var hasParams = unionTypeNames.length > 0 || ownParams.length > 0

var paramTypeName = ''

if (!hasParams) {

paramTypeName = pascalcase('EmptyParams')

} else {

paramTypeName = pascalcase(namespace + '-' + entry[0] + 'Params')

}

return methods.concat({

method: camelcase(entry[0]),

paramTypeName: paramTypeName,

unionTypeNames: unionTypeNames.length > 0 && unionTypeNames,

ownParams: ownParams.length > 0 && { params: ownParams },

exclude: !hasParams

})

}, [])

return namespaces.concat({

namespace: camelcase(namespace),

methods: methods

})

}, [])

var body = Mustache.render(template, {

requestHeaders: requestHeaders.map(JSON.stringify),

params: params,

namespaces: namespaces

})

Util.log('Writing ' + languageName + ' declarations file')

fs.writeFileSync(pathJoin(__dirname, '..', 'lib', outputFile), body, 'utf8')

}