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import { useSelector } from 'react-redux'
import { createSelector } from 'reselect'
interface RootState {
todos: {
id: number
completed: boolean
title: string
description: string
}[]
alerts: { id: number; read: boolean }[]
}
const state: RootState = {
todos: [
{
id: 0,
completed: false,
title: 'Figure out if plants are really plotting world domination.',
description: 'They may be.'
},
{
id: 1,
completed: true,
title: 'Practice telekinesis for 15 minutes',
description: 'Just do it'
}
],
alerts: [
{ id: 0, read: false },
{ id: 1, read: true }
]
}
const selectTodoById = createSelector(
[(state: RootState) => state.todos, (state: RootState, id: number) => id],
(todos, id) => todos.find(todo => todo.id === id)
)
export const createParametricSelectorHook = <
Result,
Params extends readonly unknown[]
>(
selector: (state: RootState, ...params: Params) => Result
) => {
return (...args: Params) => {
return useSelector((state: RootState) => selector(state, ...args))
}
}
export const useSelectTodo = createParametricSelectorHook(selectTodoById)
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