Files
effect-fc/packages/example/src/todo/Todo.tsx
Julien Valverdé ae70c7c98a
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Todo work
2025-07-06 18:40:55 +02:00

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TypeScript

import * as Domain from "@/domain"
import { Box, Button, Flex, IconButton, TextArea } from "@radix-ui/themes"
import { GetRandomValues, makeUuid4 } from "@typed/id"
import { Chunk, Effect, Match, Option, Ref, Runtime, SubscriptionRef } from "effect"
import { Component, Hook } from "effect-fc"
import { SubscriptionSubRef } from "effect-fc/types"
import * as React from "react"
import { FaArrowDown, FaArrowUp } from "react-icons/fa"
import { FaDeleteLeft } from "react-icons/fa6"
import { TodosState } from "./TodosState.service"
const makeTodo = makeUuid4.pipe(
Effect.map(id => Domain.Todo.Todo.make({
id,
content: "",
completedAt: Option.none(),
})),
Effect.provide(GetRandomValues.CryptoRandom),
)
export type TodoProps = (
| {
readonly _tag: "new"
readonly index?: never
}
| {
readonly _tag: "edit"
readonly index: number
}
)
export const Todo = Component.make(function* Todo(props: TodoProps) {
const runtime = yield* Effect.runtime()
const state = yield* TodosState
const ref = yield* Hook.useMemo(() => Match.value(props).pipe(
Match.tag("new", () => Effect.andThen(makeTodo, SubscriptionRef.make)),
Match.tag("edit", ({ index }) => Effect.succeed(SubscriptionSubRef.makeFromChunkRef(state.ref, index))),
Match.exhaustive,
), [props._tag, props.index])
const contentRef = React.useMemo(() => SubscriptionSubRef.makeFromPath(ref, ["content"]), [ref])
const [todo, todosSize] = yield* Hook.useSubscribeRefs(ref, state.sizeRef)
return (
<Flex direction="column" align="stretch" gap="2">
<Flex direction="row" align="center" gap="2">
<Box flexGrow="1">
<TextArea
value={todo.content}
onChange={e => Runtime.runSync(runtime)(Ref.set(contentRef, e.target.value))}
/>
</Box>
{props._tag === "edit" &&
<Flex direction="column" justify="center" align="center" gap="1">
<IconButton
onClick={() => Runtime.runSync(runtime)(
Ref.updateSome(state.ref, todos => Option.gen(function*() {
if (props.index <= 0)
return yield* Option.none()
const toSwapIndex = props.index - 1
const toSwap = yield* Chunk.get(todos, toSwapIndex)
return todos.pipe(
Chunk.replace(props.index, toSwap),
Chunk.replace(toSwapIndex, todo),
)
}))
)}
>
<FaArrowUp />
</IconButton>
<IconButton
onClick={() => Runtime.runSync(runtime)(
Ref.updateSome(state.ref, todos => Option.gen(function*() {
if (props.index >= Chunk.size(todos))
return yield* Option.none()
const toSwapIndex = props.index + 1
const toSwap = yield* Chunk.get(todos, toSwapIndex)
return todos.pipe(
Chunk.replace(props.index, toSwap),
Chunk.replace(toSwapIndex, todo),
)
}))
)}
>
<FaArrowDown />
</IconButton>
<IconButton
onClick={() => Runtime.runSync(runtime)(
Ref.update(state.ref, Chunk.remove(props.index))
)}
>
<FaDeleteLeft />
</IconButton>
</Flex>
}
</Flex>
{props._tag === "new" &&
<Flex direction="row" justify="center">
<Button
onClick={() => ref.pipe(
Effect.andThen(todo => Ref.update(state.ref, Chunk.prepend(todo))),
Effect.andThen(makeTodo),
Effect.andThen(todo => Ref.set(ref, todo)),
Runtime.runSync(runtime),
)}
>
Add
</Button>
</Flex>
}
</Flex>
)
})