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import { queryParamsToStr } from "../clientUtils/urls/UrlUtils"
import { differenceObj, trimObject } from "../clientUtils/Util"
import { ColumnTypeNames } from "../coreTable/CoreColumnDef"
import { CoreTable } from "../coreTable/CoreTable"
import {
detectDelimiter,
parseDelimited,
isCellEmpty,
} from "../coreTable/CoreTableUtils"
import { GridBoolean } from "../gridLang/GridLangConstants"
import {
ChoiceMap,
ChoiceName,
ChoiceValue,
ExplorerChoice,
ExplorerChoiceOption,
ExplorerChoiceParams,
ExplorerControlType,
ExplorerControlTypeRegex,
} from "./ExplorerConstants"
import { trimAndParseObject } from "./ExplorerProgram"
import { GrapherGrammar } from "./GrapherGrammar"
// todo: cleanup
const makeChoicesMap = (delimited: string) => {
const headerLine = delimited.split("\n")[0]
const map = new Map<ChoiceName, ExplorerControlType>()
headerLine
.split(detectDelimiter(headerLine))
.filter((name) => ExplorerControlTypeRegex.test(name))
.forEach((choiceNameAndType) => {
const words = choiceNameAndType.split(" ")
const [choiceName, choiceType] = [
words.slice(0, -1).join(" "),
words[words.length - 1],
]
map.set(choiceName as ChoiceName, choiceType as ExplorerControlType)
})
return map
}
// This strips the "Dropdown" or "Checkbox" from "SomeChoice Dropdown" or "SomeChoice Checkbox"
const removeChoiceControlTypeInfo = (label: string) =>
label.replace(ExplorerControlTypeRegex, "")
const dropColumnTypes = (delimited: string): string => {
const rows = delimited.split("\n")
const delimiter = detectDelimiter(rows[0])
rows[0] = rows[0]
.split(delimiter)
.map(removeChoiceControlTypeInfo)
.join(delimiter)
return rows.join("\n")
}
const makeCheckBoxOption = (
options: ExplorerChoiceOption[],
choiceName: string
) => {
const checked = options.some(
(option) => option.checked === true && option.value === GridBoolean.true
)
const available =
new Set(options.filter((opt) => opt.available).map((opt) => opt.label))
.size === 2
return [
{
label: choiceName,
checked,
value: GridBoolean.true,
available,
} as ExplorerChoiceOption,
]
}
// Takes the author's program and the user's current settings and returns an object for
// allow the user to navigate amongst charts.
export class DecisionMatrix {
private table: CoreTable
@observable currentParams: ExplorerChoiceParams = {}
constructor(delimited: string, hash = "") {
this.choices = makeChoicesMap(delimited)
this.table = new CoreTable(parseDelimited(dropColumnTypes(delimited)), [
// todo: remove col def?
{
slug: GrapherGrammar.grapherId.keyword,
type: ColumnTypeNames.Integer,
},
])
this.hash = hash
this.setValuesFromChoiceParams() // Initialize options
}
allDecisionsAsQueryParams(): ExplorerChoiceParams[] {
return this.table.rows.map((row) => {
const choiceParams: ExplorerChoiceParams = {}
this.choiceNames.forEach((name) => {
choiceParams[name] = row[name]
})
return choiceParams
})
}
get numRows() {
return this.table.numRows
}
get requiredGrapherIds() {
return this.table.get(GrapherGrammar.grapherId.keyword).uniqValues
}
private choices: Map<ChoiceName, ExplorerControlType>
hash: string
toConstrainedOptions(): ExplorerChoiceParams {
const settings = { ...this.currentParams }
this.choiceNames.forEach((choiceName) => {
// check if the current choice is valid with the current settings
if (
this.isOptionAvailable(
choiceName,
settings[choiceName],
settings
)
) {
// do nothing - we can use settings[choiceName] as-is
}
// check if the default choice is valid with the current settings
else if (
this.defaultSettings[choiceName] !== undefined &&
this.isOptionAvailable(
choiceName,
this.defaultSettings[choiceName],
settings
)
) {
settings[choiceName] = this.defaultSettings[choiceName]
}
// if both are not valid, find the first valid option
else {
settings[choiceName] = this.firstAvailableOptionForChoice(
choiceName,
settings
)!
}
})
return settings
}
@computed
private get diffBetweenUserSettingsAndConstrained(): ExplorerChoiceParams {
return differenceObj(
this.toConstrainedOptions(),
this.currentParams
) as ExplorerChoiceParams
}
@action.bound setValueCommand(choiceName: ChoiceName, value: ChoiceValue) {
this._setValue(choiceName, value)
const invalidState = this.diffBetweenUserSettingsAndConstrained
Object.keys(invalidState).forEach((key) => {
// If a user navigates to a state where an option previously selected is not available,
// then persist the new option, as long as it isn't the only one available.
//
// For example, if the user navigates from metric:Cases interval:Weekly, to
// metric:Vaccinations, if interval:Weekly is not available for Vaccinations but other
// (more than one) intervals are available, we will persist whichever we happen to end
// up on.
//
// But if the user navigates from metric:Cases perCapita:true, to
// metric:Share of positive tests, then the only available perCapita option is false,
// but it isn't persisted, because the user has no other options. It's non-sensical to
// ask for "Share of positive tests per capita", so qualitatively it's a different
// metric, and the perCapita can just be ignored.
//
// We assume in every case where the user has only a single option available (therefore
// has no choice) the option should not be persisted.
if (this.availableChoiceOptions[key].length > 1) {
this._setValue(key, invalidState[key])
}
})
}
@action.bound private _setValue(
choiceName: ChoiceName,
value: ChoiceValue
) {
if (value === "") delete this.currentParams[choiceName]
else this.currentParams[choiceName] = value
this.selectedRow = trimAndParseObject(
this.table.rowsAt([this.selectedRowIndex])[0],
GrapherGrammar
)
}
@action.bound setValuesFromChoiceParams(
choiceParams: ExplorerChoiceParams = {}
) {
this.choiceNames.forEach((choiceName) => {
const choiceValue =
choiceParams[choiceName] ?? this.defaultSettings[choiceName]
if (choiceValue === undefined)
this._setValue(
choiceName,
this.firstAvailableOptionForChoice(choiceName)!
)
else this._setValue(choiceName, choiceValue)
})
return this
}
@computed private get choiceNames(): ChoiceName[] {
return Array.from(this.choices.keys())
}
@computed private get allChoiceOptions(): ChoiceMap {
const choiceMap: ChoiceMap = {}
this.choiceNames.forEach((choiceName) => {
choiceMap[choiceName] = this.table
.get(choiceName)
.uniqValues.filter((cell) => !isCellEmpty(cell)) as string[]
})
return choiceMap
}
@computed private get availableChoiceOptions(): ChoiceMap {
const result: ChoiceMap = {}
this.choiceNames.forEach((choiceName) => {
result[choiceName] = this.allChoiceOptions[choiceName].filter(
(option) => this.isOptionAvailable(choiceName, option)
)
})
return result
}
private firstAvailableOptionForChoice(
choiceName: ChoiceName,
currentState = this.currentParams
): ChoiceValue | undefined {
return this.allChoiceOptions[choiceName].find((option) =>
this.isOptionAvailable(choiceName, option, currentState)
)
}
/**
* Note: there is a rare bug in here + rowsWith when an author has a complex decision matrix. If the user vists a url
* with invalid options like Metric="Tests", Interval="Weekly", Aligned="false"
* we will return first match, which is B1, even though B2 is a better match.
*
* graphers
* title Metric Radio Interval Radio Aligned Checkbox
* A1 Cases Cumulative true
* A2 Cases Cumulative false
* A3 Cases Weekly false
*
* B1 Tests Cumulative true
* B2 Tests Cumulative false
*/
isOptionAvailable(
choiceName: ChoiceName,
option: ChoiceValue,
currentState = this.currentParams
) {
const query: ExplorerChoiceParams = {}
this.choiceNames
.slice(0, this.choiceNames.indexOf(choiceName))
.forEach((name) => {
query[name] = currentState[name]
})
query[choiceName] = option
return this.rowsWith(query, choiceName).length > 0
}
private rowsWith(query: ExplorerChoiceParams, choiceName?: ChoiceName) {
// We allow other options to be blank.
const modifiedQuery: any = {}
Object.keys(trimObject(query)).forEach((queryColumn) => {
if (queryColumn !== choiceName)
// Blanks are fine if we are not talking about the column of interest
modifiedQuery[queryColumn] = [query[queryColumn], ""]
else modifiedQuery[queryColumn] = query[queryColumn]
})
return this.table.findRows(modifiedQuery)
}
// The first row with defaultView column value of "true" determines the default view to use
private get defaultSettings() {
const hits = this.rowsWith({
[GrapherGrammar.defaultView.keyword]: "true",
})
return hits[0] ?? {}
}
private get firstMatch() {
const query = this.toConstrainedOptions()
const hits = this.rowsWith(query)
return hits[0]
}
get selectedRowIndex() {
return this.firstMatch === undefined
? 0
: this.table.indexOf(this.firstMatch)
}
@observable selectedRow: any = {}
private toControlOption(
choiceName: ChoiceName,
optionName: string,
currentValue: ChoiceValue,
constrainedOptions: ExplorerChoiceParams
): ExplorerChoiceOption {
const available = this.isOptionAvailable(
choiceName,
optionName,
constrainedOptions
)
return {
label: optionName,
value: optionName,
available,
checked: currentValue === optionName,
}
}
@computed get choicesWithAvailability(): ExplorerChoice[] {
const selectedRow = this.selectedRow
const constrainedOptions = this.toConstrainedOptions()
return this.choiceNames.map((title) => {
const value =
selectedRow[title] !== undefined
? selectedRow[title].toString()
: selectedRow[title]
const options = this.allChoiceOptions[title].map((optionName) =>
this.toControlOption(
title,
optionName,
value,
constrainedOptions
)
)
const type = this.choices.get(title)!
return {
title,
displayTitle: title,
type,
value,
options:
type === ExplorerControlType.Checkbox
? makeCheckBoxOption(options, title)
: options,
}
})
}
toString() {
return queryParamsToStr(this.currentParams)
}
}
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