Paul Frazee
54faa7e176
* Update login page to use service query * Update modal to use session instead of store * Move image sizes cache off store * Update settings to no longer use store * Update link-meta fetch to use agent instead of rootstore * Remove deprecated resolveName() * Delete deprecated link-metas cache * Delete deprecated posts cache * Delete all remaining mobx models, including the root store * Strip out unused mobx observer wrappers
35 lines
912 B
TypeScript
35 lines
912 B
TypeScript
import {Image} from 'react-native'
|
|
import type {Dimensions} from 'lib/media/types'
|
|
|
|
const sizes: Map<string, Dimensions> = new Map()
|
|
const activeRequests: Map<string, Promise<Dimensions>> = new Map()
|
|
|
|
export function get(uri: string): Dimensions | undefined {
|
|
return sizes.get(uri)
|
|
}
|
|
|
|
export async function fetch(uri: string): Promise<Dimensions> {
|
|
const Dimensions = sizes.get(uri)
|
|
if (Dimensions) {
|
|
return Dimensions
|
|
}
|
|
|
|
const prom =
|
|
activeRequests.get(uri) ||
|
|
new Promise<Dimensions>(resolve => {
|
|
Image.getSize(
|
|
uri,
|
|
(width: number, height: number) => resolve({width, height}),
|
|
(err: any) => {
|
|
console.error('Failed to fetch image dimensions for', uri, err)
|
|
resolve({width: 0, height: 0})
|
|
},
|
|
)
|
|
})
|
|
activeRequests.set(uri, prom)
|
|
const res = await prom
|
|
activeRequests.delete(uri)
|
|
sizes.set(uri, res)
|
|
return res
|
|
}
|