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|
import {ComposerImage, createInitialImages} from '#/state/gallery'
import {ComposerOpts} from '#/state/shell/composer'
type PostRecord = {
uri: string
}
type ImagesMedia = {
type: 'images'
images: ComposerImage[]
labels: string[]
}
type ComposerEmbed = {
// TODO: Other record types.
record: PostRecord | undefined
// TODO: Other media types.
media: ImagesMedia | undefined
}
export type ComposerState = {
// TODO: Other draft data.
embed: ComposerEmbed
}
export type ComposerAction =
| {type: 'embed_add_images'; images: ComposerImage[]}
| {type: 'embed_update_image'; image: ComposerImage}
| {type: 'embed_remove_image'; image: ComposerImage}
const MAX_IMAGES = 4
export function composerReducer(
state: ComposerState,
action: ComposerAction,
): ComposerState {
switch (action.type) {
case 'embed_add_images': {
const prevMedia = state.embed.media
let nextMedia = prevMedia
if (!prevMedia) {
nextMedia = {
type: 'images',
images: action.images.slice(0, MAX_IMAGES),
labels: [],
}
} else if (prevMedia.type === 'images') {
nextMedia = {
...prevMedia,
images: [...prevMedia.images, ...action.images].slice(0, MAX_IMAGES),
}
}
return {
...state,
embed: {
...state.embed,
media: nextMedia,
},
}
}
case 'embed_update_image': {
const prevMedia = state.embed.media
if (prevMedia?.type === 'images') {
const updatedImage = action.image
const nextMedia = {
...prevMedia,
images: prevMedia.images.map(img => {
if (img.source.id === updatedImage.source.id) {
return updatedImage
}
return img
}),
}
return {
...state,
embed: {
...state.embed,
media: nextMedia,
},
}
}
return state
}
case 'embed_remove_image': {
const prevMedia = state.embed.media
if (prevMedia?.type === 'images') {
const removedImage = action.image
let nextMedia: ImagesMedia | undefined = {
...prevMedia,
images: prevMedia.images.filter(img => {
return img.source.id !== removedImage.source.id
}),
}
if (nextMedia.images.length === 0) {
nextMedia = undefined
}
return {
...state,
embed: {
...state.embed,
media: nextMedia,
},
}
}
return state
}
default:
return state
}
}
export function createComposerState({
initImageUris,
}: {
initImageUris: ComposerOpts['imageUris']
}): ComposerState {
let media: ImagesMedia | undefined
if (initImageUris?.length) {
media = {
type: 'images',
images: createInitialImages(initImageUris),
labels: [],
}
}
return {
embed: {
record: undefined,
media,
},
}
}
|
