File size: 4,142 Bytes
064bfd6 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 | import { useCallback, useReducer } from 'react'
export type AnswerValue = string
export type QuestionState = {
selectedValue?: string | string[]
textInputValue: string
}
type State = {
currentQuestionIndex: number
answers: Record<string, AnswerValue>
questionStates: Record<string, QuestionState>
isInTextInput: boolean
}
type Action =
| { type: 'next-question' }
| { type: 'prev-question' }
| {
type: 'update-question-state'
questionText: string
updates: Partial<QuestionState>
isMultiSelect: boolean
}
| {
type: 'set-answer'
questionText: string
answer: string
shouldAdvance: boolean
}
| { type: 'set-text-input-mode'; isInInput: boolean }
function reducer(state: State, action: Action): State {
switch (action.type) {
case 'next-question':
return {
...state,
currentQuestionIndex: state.currentQuestionIndex + 1,
isInTextInput: false,
}
case 'prev-question':
return {
...state,
currentQuestionIndex: Math.max(0, state.currentQuestionIndex - 1),
isInTextInput: false,
}
case 'update-question-state': {
const existing = state.questionStates[action.questionText]
const newState: QuestionState = {
selectedValue:
action.updates.selectedValue ??
existing?.selectedValue ??
(action.isMultiSelect ? [] : undefined),
textInputValue:
action.updates.textInputValue ?? existing?.textInputValue ?? '',
}
return {
...state,
questionStates: {
...state.questionStates,
[action.questionText]: newState,
},
}
}
case 'set-answer': {
const newState = {
...state,
answers: {
...state.answers,
[action.questionText]: action.answer,
},
}
if (action.shouldAdvance) {
return {
...newState,
currentQuestionIndex: newState.currentQuestionIndex + 1,
isInTextInput: false,
}
}
return newState
}
case 'set-text-input-mode':
return {
...state,
isInTextInput: action.isInInput,
}
}
}
const INITIAL_STATE: State = {
currentQuestionIndex: 0,
answers: {},
questionStates: {},
isInTextInput: false,
}
export type MultipleChoiceState = {
currentQuestionIndex: number
answers: Record<string, AnswerValue>
questionStates: Record<string, QuestionState>
isInTextInput: boolean
nextQuestion: () => void
prevQuestion: () => void
updateQuestionState: (
questionText: string,
updates: Partial<QuestionState>,
isMultiSelect: boolean,
) => void
setAnswer: (
questionText: string,
answer: string,
shouldAdvance?: boolean,
) => void
setTextInputMode: (isInInput: boolean) => void
}
export function useMultipleChoiceState(): MultipleChoiceState {
const [state, dispatch] = useReducer(reducer, INITIAL_STATE)
const nextQuestion = useCallback(() => {
dispatch({ type: 'next-question' })
}, [])
const prevQuestion = useCallback(() => {
dispatch({ type: 'prev-question' })
}, [])
const updateQuestionState = useCallback(
(
questionText: string,
updates: Partial<QuestionState>,
isMultiSelect: boolean,
) => {
dispatch({
type: 'update-question-state',
questionText,
updates,
isMultiSelect,
})
},
[],
)
const setAnswer = useCallback(
(questionText: string, answer: string, shouldAdvance: boolean = true) => {
dispatch({
type: 'set-answer',
questionText,
answer,
shouldAdvance,
})
},
[],
)
const setTextInputMode = useCallback((isInInput: boolean) => {
dispatch({ type: 'set-text-input-mode', isInInput })
}, [])
return {
currentQuestionIndex: state.currentQuestionIndex,
answers: state.answers,
questionStates: state.questionStates,
isInTextInput: state.isInTextInput,
nextQuestion,
prevQuestion,
updateQuestionState,
setAnswer,
setTextInputMode,
}
}
|