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import { QueryParams } from "../../clientUtils/urls/UrlUtils"
import { ExplorerUrlMigrationSpec } from "./ExplorerUrlMigrations"
import { legacyToCurrentGrapherUrl } from "../../grapher/core/GrapherUrlMigrations"
import { Url } from "../../clientUtils/urls/Url"
import { EXPLORERS_ROUTE_FOLDER } from "../ExplorerConstants"
const covidMetricFromLegacyQueryParams = (queryParams: QueryParams) => {
if (queryParams.casesMetric) {
return "Confirmed cases"
} else if (queryParams.deathsMetric) {
return "Confirmed deaths"
} else if (queryParams.cfrMetric) {
return "Case fatality rate"
} else if (queryParams.testsMetric) {
return "Tests"
} else if (queryParams.testsPerCaseMetric) {
return "Tests per confirmed case"
} else if (queryParams.positiveTestRate) {
return "Share of positive tests"
} else if (queryParams.vaccinationsMetric) {
return "Vaccinations"
}
return undefined
}
const legacyIntervalToNewValue = {
daily: "New per day",
weekly: "Weekly",
total: "Cumulative",
smoothed: "7-day rolling average",
biweekly: "Biweekly",
weeklyChange: "Weekly change",
biweeklyChange: "Biweekly change",
}
const covidIntervalFromLegacyQueryParams = (queryParams: QueryParams) => {
let legacyInterval: string | undefined = undefined
// Early on, the query string was a few booleans like dailyFreq=true.
// Now it is a single 'interval'. This transformation is for backward compat.
if (queryParams.interval) {
legacyInterval = queryParams.interval
} else if (queryParams.totalFreq) {
legacyInterval = "total"
} else if (queryParams.dailyFreq) {
legacyInterval = "daily"
} else if (queryParams.smoothing) {
legacyInterval = "smoothed"
}
if (legacyInterval) {
return legacyIntervalToNewValue[
legacyInterval as keyof typeof legacyIntervalToNewValue
]
}
return undefined
}
const boolParamToString = (bool: boolean | string | undefined) =>
bool ? "true" : "false"
const legacyToCurrentCovidQueryParams = (
queryParams: QueryParams,
baseQueryParams: QueryParams = {}
): QueryParams => {
const restQueryParams = omit(
{
...baseQueryParams,
...queryParams,
},
"casesMetric",
"deathsMetric",
"cfrMetric",
"testsMetric",
"testsPerCaseMetric",
"positiveTestRate",
"vaccinationsMetric",
"interval",
"smoothing",
"totalFreq",
"dailyFreq",
"aligned",
"perCapita"
)
const urlContainsMetric = !!covidMetricFromLegacyQueryParams(queryParams)
const explorerQueryParams: QueryParams = {
Metric:
covidMetricFromLegacyQueryParams(queryParams) ??
covidMetricFromLegacyQueryParams(baseQueryParams),
Interval:
covidIntervalFromLegacyQueryParams(queryParams) ??
covidIntervalFromLegacyQueryParams(baseQueryParams),
"Align outbreaks": urlContainsMetric
? boolParamToString(queryParams.aligned)
: boolParamToString(baseQueryParams.aligned),
"Relative to Population": urlContainsMetric
? boolParamToString(queryParams.perCapita)
: boolParamToString(baseQueryParams.perCapita),
}
return {
...restQueryParams,
...explorerQueryParams,
}
}
export const legacyCovidMigrationSpec: ExplorerUrlMigrationSpec = {
explorerSlug: "coronavirus-data-explorer",
migrateUrl: (url, baseQueryStr) => {
// Migrate the Grapher query params in both URLs
const [explorerUrl, baseUrl] = [
url,
Url.fromQueryStr(baseQueryStr),
].map(legacyToCurrentGrapherUrl)
return explorerUrl
.setQueryParams(
legacyToCurrentCovidQueryParams(
explorerUrl.queryParams,
baseUrl.queryParams
)
)
.update({
pathname: `/${EXPLORERS_ROUTE_FOLDER}/coronavirus-data-explorer`,
})
},
}
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