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import {value_checks} from './checks'
import {exporter} from './exporter'
import * as retrievers from './retrievers'
import * as formatter from './formatters'
import * as ingester from './ingesters'
import * as summary from './summary'
import * as mapper from './mappers'
import * as parser from './parsers'
import type {
Settings,
Variable,
Metadata,
MeasureInfos,
DataSets,
Features,
Variables,
References,
Entities,
Relations,
MetaTime,
LogicalObject,
Promises,
DataMaps,
DataResource,
MeasureInfo,
DataPackage,
EntityFeatureSet,
Entity,
} from '../types'
import {SiteDataView} from '../site/dataview'
export default class DataHandler {
constructor(
settings?: Settings,
defaults?: {[index: string]: string},
data?: DataSets,
hooks?: {[index: string]: Function}
) {
this.defaults = defaults || {}
this.settings = settings || {}
this.metadata = this.settings.metadata || {datasets: []}
this.sets = data || {}
this.hooks = hooks || {}
this.get_value = this.get_value.bind(this)
this.dynamic_load = 'dataviews' in this.settings && this.settings.settings && !!this.settings.settings.partial_init
this.settings.view_names = this.dynamic_load ? Object.keys(this.settings.dataviews) : ['default_view']
Iif ('string' === typeof this.metadata.datasets) this.metadata.datasets = [this.metadata.datasets]
const init = () => {
if (!this.metadata.datasets || !this.metadata.datasets.length) {
this.metadata.datasets = Object.keys(this.info)
if (!this.metadata.datasets.length) this.metadata.datasets = Object.keys(this.sets)
}
Iif (this.metadata.measure_info) {
const info = parser.measure_info(this.metadata.measure_info)
this.metadata.datasets.forEach((d: string) => {
Iif (info._references) this.info[d]._references = info._references
const v = this.info[d].schema.fields
v.forEach(e => (e.name in info ? (e.info = info[e.name] as MeasureInfo) : ''))
})
}
this.map_variables()
if (this.metadata.datasets.length) {
this.metadata.datasets.forEach((k: string) => {
this.loaded[k] = k in this.sets
this.inited[k] = false
this.data_processed[k] = new Promise(resolve => {
this.data_promise[k] = resolve
})
Iif (k in this.info)
this.info[k].site_file = (this.metadata.url ? this.metadata.url + '/' : '') + this.info[k].name + '.json'
if (this.loaded[k]) {
this.ingest_data(this.sets[k], k)
} else IEif (
!this.dynamic_load ||
(this.settings.settings && !this.settings.settings.partial_init) ||
!this.defaults.dataset ||
k === this.defaults.dataset
) {
this.retrieve(k, this.info[k].site_file)
}
})
} else {
setTimeout(() => {
this.inited.first = true
this.hooks.init && this.hooks.init()
this.hooks.onload && this.hooks.onload()
}, 0)
}
}
Iif (this.metadata.package && !this.metadata.info) {
if ('undefined' === typeof window) {
require('https')
.get(this.metadata.url + this.metadata.package, (r: {on: Function}) => {
const c: string[] = []
r.on('data', (d: string) => {
c.push(d)
})
r.on('end', () => {
this.info = {}
const dp: DataPackage = JSON.parse(c.join(''))
Iif (dp.measure_info) this.metadata.measure_info = dp.measure_info
dp.resources.forEach((r: DataResource) => (this.info[r.name] = r))
init()
})
})
.end()
} else {
const f = new window.XMLHttpRequest()
f.onreadystatechange = () => {
Iif (4 === f.readyState) {
if (200 === f.status) {
this.info = {}
const dp = JSON.parse(f.responseText)
Iif (dp.measure_info) this.metadata.measure_info = dp.measure_info
dp.resources.forEach((r: DataResource) => (this.info[r.name] = r))
init()
} else {
throw new Error('failed to load datapackage: ' + f.responseText)
}
}
}
f.open('GET', this.metadata.url + this.metadata.package)
f.send()
}
} else {
Iif (this.metadata.info) this.info = this.metadata.info
init()
}
}
hooks: {[index: string]: Function} = {}
defaults: {[index: string]: string} = {dataview: 'default_view', time: 'time'}
settings: Settings = {}
metadata: Metadata = {datasets: []}
info: {[index: string]: DataResource} = {}
sets: DataSets = {}
dynamic_load = false
all_data_ready: Function = () => false
data_ready: Promise<void> = new Promise(resolve => {
this.all_data_ready = resolve
})
features: Features = {}
variables: Variables = {}
variable_codes: Variables = {}
variable_info: MeasureInfos = {}
references: References = {}
entities: Entities = {}
entity_tree: {[index: string]: Relations} = {}
meta: MetaTime = {
times: {},
variables: {},
ranges: {},
overall: {
range: [Infinity, -Infinity],
value: [],
},
}
loaded: LogicalObject = {}
onload: () => {}
inited: {[index: string]: number | NodeJS.Timeout | boolean} = {}
inited_summary: Promises = {}
summary_ready: {[index: string]: Function} = {}
entity_features: EntityFeatureSet = {}
data_maps: DataMaps = {}
data_queue: {[index: string]: {[index: string]: Function}} = {}
data_promise: {[index: string]: Function} = {}
data_processed: Promises = {}
load_requests: {[index: string]: string} = {}
retrieve = async function (this: DataHandler, name: string, url: string) {
Iif (!this.load_requests[name]) {
this.load_requests[name] = url
const f = new window.XMLHttpRequest()
f.onreadystatechange = () => {
Iif (4 === f.readyState) {
if (200 === f.status) {
this.ingest_data(JSON.parse(f.responseText), name)
} else {
throw new Error('DataHandler.retrieve failed: ' + f.responseText)
}
}
}
f.open('GET', url, true)
f.send()
}
}
format_value = formatter.value
format_label = formatter.label
ingest_data = ingester.data
ingest_map = ingester.map
load_id_maps = ingester.id_maps
init_summary = summary.init
calculate_summary = summary.calculate
map_variables = mapper.variables
map_entities = mapper.entities
parse_query = parser.query
export = exporter
get_variable = async function (this: DataHandler, variable: string, view: SiteDataView): Promise<Variable> {
Iif (variable in this.variables) await this.calculate_summary(variable, view, true)
return this.variables[variable]
}
get_value = function vector(this: DataHandler, r: {variable: string; entity: Entity}): number[] {
if (this.variables[r.variable].is_time) {
return r.entity.time.value as number[]
} else {
const v = this.variables[r.variable].code
return (
v in r.entity.data ? (Array.isArray(r.entity.data[v]) ? r.entity.data[v] : [r.entity.data[v]]) : [NaN]
) as number[]
}
}
public static retrievers = retrievers
public static checks = value_checks
}
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