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import { Writable } from "stream"
import * as db from "../db"
import {
OwidChartDimensionInterface,
OwidVariableDisplayConfigInterface,
} from "../../clientUtils/OwidVariableDisplayConfigInterface"
import { OwidVariablesAndEntityKey } from "../../clientUtils/OwidVariable"
import { arrToCsvRow, omitNullableValues } from "../../clientUtils/Util"
import {
DataValueQueryArgs,
DataValueResult,
OwidVariableId,
} from "../../clientUtils/owidTypes"
import { OwidSource } from "../../clientUtils/OwidSource"
export namespace Variable {
export interface Row {
id: number
name: string
code: string | null
unit: string
shortUnit: string | null
description: string | null
createdAt: Date
updatedAt: Date
datasetId: number
sourceId: number
display: OwidVariableDisplayConfigInterface
coverage?: string
timespan?: string
columnOrder?: number
}
export type UnparsedRow = Row & { display: string }
export type Field = keyof Row
export const table = "variables"
export function rows(plainRows: UnparsedRow[]): Row[] {
for (const row of plainRows) {
row.display = row.display ? JSON.parse(row.display) : undefined
}
return plainRows
}
}
export async function getVariableData(variableIds: number[]): Promise<any> {
variableIds = lodash.uniq(variableIds)
const data: OwidVariablesAndEntityKey = { variables: {}, entityKey: {} }
type VariableQueryRow = Readonly<
Variable.UnparsedRow & {
display: string
datasetName: string
nonRedistributable: number
sourceName: string
sourceDescription: string
}
>
const variableQuery: Promise<VariableQueryRow[]> = db.queryMysql(
`
SELECT
variables.*,
datasets.name AS datasetName,
datasets.nonRedistributable AS nonRedistributable,
sources.name AS sourceName,
sources.description AS sourceDescription
FROM variables
JOIN datasets ON variables.datasetId = datasets.id
JOIN sources ON variables.sourceId = sources.id
WHERE variables.id IN (?)
`,
[variableIds]
)
const dataQuery = db.queryMysql(
`
SELECT
value,
year,
variableId,
entities.id AS entityId,
entities.name AS entityName,
entities.code AS entityCode
FROM data_values
LEFT JOIN entities ON data_values.entityId = entities.id
WHERE data_values.variableId IN (?)
ORDER BY
variableId ASC,
year ASC
`,
[variableIds]
)
const variables = await variableQuery
for (const row of variables) {
const {
sourceId,
sourceName,
sourceDescription,
nonRedistributable,
display: displayJson,
...variable
} = row
const display = JSON.parse(displayJson)
const partialSource: OwidSource = JSON.parse(sourceDescription)
data.variables[variable.id] = {
...omitNullableValues(variable),
nonRedistributable: Boolean(nonRedistributable),
display,
source: {
id: sourceId,
name: sourceName,
dataPublishedBy: partialSource.dataPublishedBy || "",
dataPublisherSource: partialSource.dataPublisherSource || "",
link: partialSource.link || "",
retrievedDate: partialSource.retrievedDate || "",
additionalInfo: partialSource.additionalInfo || "",
},
years: [],
entities: [],
values: [],
}
}
const results = await dataQuery
for (const row of results) {
const variable = data.variables[row.variableId]
variable.years.push(row.year)
variable.entities.push(row.entityId)
const asNumber = parseFloat(row.value)
if (!isNaN(asNumber)) variable.values.push(asNumber)
else variable.values.push(row.value)
if (data.entityKey[row.entityId] === undefined) {
data.entityKey[row.entityId] = {
name: row.entityName,
code: row.entityCode,
}
}
}
return data
}
// TODO use this in Dataset.writeCSV() maybe?
export async function writeVariableCSV(
variableIds: number[],
stream: Writable
): Promise<void> {
const variableQuery: Promise<{ id: number; name: string }[]> =
db.queryMysql(
`
SELECT id, name
FROM variables
WHERE id IN (?)
`,
[variableIds]
)
const dataQuery: Promise<
{
variableId: number
entity: string
year: number
value: string
}[]
> = db.queryMysql(
`
SELECT
data_values.variableId AS variableId,
entities.name AS entity,
data_values.year AS year,
data_values.value AS value
FROM
data_values
JOIN entities ON entities.id = data_values.entityId
JOIN variables ON variables.id = data_values.variableId
WHERE
data_values.variableId IN (?)
ORDER BY
data_values.entityId ASC,
data_values.year ASC
`,
[variableIds]
)
let variables = await variableQuery
const variablesById = lodash.keyBy(variables, "id")
// Throw an error if not all variables exist
if (variables.length !== variableIds.length) {
const fetchedVariableIds = variables.map((v) => v.id)
const missingVariables = lodash.difference(
variableIds,
fetchedVariableIds
)
throw Error(`Variable IDs do not exist: ${missingVariables.join(", ")}`)
}
variables = variableIds.map((variableId) => variablesById[variableId])
const columns = ["Entity", "Year"].concat(variables.map((v) => v.name))
stream.write(arrToCsvRow(columns))
const variableColumnIndex: { [id: number]: number } = {}
for (const variable of variables) {
variableColumnIndex[variable.id] = columns.indexOf(variable.name)
}
const data = await dataQuery
let row: unknown[] = []
for (const datum of data) {
if (datum.entity !== row[0] || datum.year !== row[1]) {
// New row
if (row.length) {
stream.write(arrToCsvRow(row))
}
row = [datum.entity, datum.year]
for (const variable of variables) {
row.push("")
}
}
row[variableColumnIndex[datum.variableId]] = datum.value
}
}
export const getDataValue = async ({
variableId,
entityId,
year,
}: DataValueQueryArgs): Promise<DataValueResult | undefined> => {
if (!variableId || !entityId) return
const queryStart = `
SELECT
value,
year,
variables.unit AS unit,
entities.name AS entityName
FROM data_values
JOIN entities on entities.id = data_values.entityId
JOIN variables on variables.id = data_values.variableId
WHERE entities.id = ?
AND variables.id = ?`
const queryStartVariables = [entityId, variableId]
let row
if (year) {
row = await db.mysqlFirst(
`${queryStart}
AND data_values.year = ?`,
[...queryStartVariables, year]
)
} else {
row = await db.mysqlFirst(
`${queryStart}
ORDER BY data_values.year DESC
LIMIT 1`,
queryStartVariables
)
}
if (!row) return
return {
value: Number(row.value),
year: Number(row.year),
unit: row.unit,
entityName: row.entityName,
}
}
export const getOwidChartDimensionConfigForVariable = async (
variableId: OwidVariableId,
chartId: number
): Promise<OwidChartDimensionInterface | undefined> => {
const row = await db.mysqlFirst(
`
SELECT config->"$.dimensions" AS dimensions
FROM charts
WHERE id = ?
`,
[chartId]
)
if (!row.dimensions) return
const dimensions = JSON.parse(row.dimensions)
return dimensions.find(
(dimension: OwidChartDimensionInterface) =>
dimension.variableId === variableId
)
}
export const getOwidVariableDisplayConfig = async (
variableId: OwidVariableId
): Promise<OwidVariableDisplayConfigInterface | undefined> => {
const row = await db.mysqlFirst(
`SELECT display FROM variables WHERE id = ?`,
[variableId]
)
if (!row.display) return
return JSON.parse(row.display)
}
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