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| 'use strict'
const resolvers = module.exports = { }
const _ = {
assign: require('lodash.assign')
}
const rerouter = require('../rerouter.js')
const jsonApi = require('../..')
resolvers.search = (resourceConfig, attribute, parent, args, req, ast) => {
let path
// If we don't have a JSON:API resource, go get it
if (!parent) {
path = jsonApi._apiConfig.pathPrefix + resourceConfig.resource
return resolvers.rerouteTo('GET', path, { }, req, ast)
}
// Simple attributes can be plucked from the JSON:API resource
if (!resourceConfig.attributes[attribute]._settings) {
return parent.attributes[attribute]
}
// Related resources need to be requested via the related link
path = parent.relationships[attribute].links.related
return resolvers.rerouteTo('GET', path, { }, req, ast)
}
resolvers.create = (resourceConfig, parent, args, req, ast) => {
const path = jsonApi._apiConfig.pathPrefix + resourceConfig.resource
const data = resolvers.generateResourceFromArgs(args, resourceConfig)
return resolvers.rerouteTo('POST', path, { data }, req, ast)
}
resolvers.update = (resourceConfig, parent, args, req, ast) => {
const path = `${jsonApi._apiConfig.pathPrefix + resourceConfig.resource}/${args[resourceConfig.resource].id}`
const data = resolvers.generateResourceFromArgs(args, resourceConfig)
return resolvers.rerouteTo('PATCH', path, { data }, req, ast)
}
resolvers.delete = (resourceConfig, parent, args, req, ast) => {
const path = `${jsonApi._apiConfig.pathPrefix + resourceConfig.resource}/${args.id}`
let resource
return resolvers.rerouteTo('GET', path, { }, req, ast)
.then(originalResource => {
resource = originalResource
return resolvers.rerouteTo('DELETE', path, { }, req, ast)
}).then(() => resource)
}
resolvers.rerouteTo = (method, path, args, req, ast) => new Promise((resolve, reject) => {
rerouter.route({
method,
uri: path,
params: _.assign({
fields: resolvers.generateFieldsQueryFromAst(ast),
filter: resolvers.generateFilterQueryFromAst(ast)
}, args),
originalRequest: {
headers: req.headers || { },
cookies: req.cookies || { }
}
}, (err, json) => {
if (err) return reject(err.errors.map(e => e.detail))
resolve(json.data)
})
})
resolvers.generateResourceFromArgs = (args, resourceConfig) => {
if ((Object.keys(args).length === 1) && (args[resourceConfig.resource])) {
args = args[resourceConfig.resource]
}
const data = {
type: resourceConfig.resource,
attributes: { },
relationships: { }
}
Object.keys(resourceConfig.attributes).forEach(attribute => {
const joiSchema = resourceConfig.attributes[attribute]
if (!args[attribute]) return
if (!joiSchema._settings) {
data.attributes[attribute] = args[attribute]
} else {
data.relationships[attribute] = {
data: args[attribute]
};
[].concat(data.relationships[attribute].data).forEach(relation => {
relation.type = (joiSchema._settings.__one || joiSchema._settings.__many)[0]
})
}
})
return data
}
resolvers.generateFieldsQueryFromAst = ast => {
const arrays = (ast.fieldASTs || []).map(fieldAST => fieldAST.selectionSet.selections || [ ])
const combined = [].concat.apply([], arrays)
let fields = combined.map(thing => (thing.name || { }).value).filter(a => a)
fields = fields.join(',')
return fields
}
resolvers.generateFilterQueryFromAst = ast => {
const arrays = (ast.fieldNodes || []).map(function (fieldAST) {
return fieldAST.arguments || [ ]
})
const combined = [].concat.apply([], arrays)
const filter = { }
combined.forEach(thing => {
filter[thing.name.value] = thing.value.value
})
return filter
}
|