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| 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 | 1x 1x 15x 15x 15x 5x 15x 255x 1x | import { addProvider } from '../metaData';
let state: Record<string, any> = {}; // Calibrated pixel spacing per imageId
/**
* Simple metadata provider that stores some sort of meta data for each imageId.
*/
const metadataProvider = {
/**
* Adds a cloned copy of the metadata for an imageId as the given type.
* Note that this will strip out any functions or other non-cloneables.
*
* @param imageId - the imageId for the metadata to store
* @param payload - the payload
*/
add: (imageId: string, payload: { metadata: any; type: string }): void => {
metadataProvider.addRaw(imageId, {
...payload,
metadata: structuredClone(payload.metadata),
});
},
/**
* Adds a raw metadata instances for an imageId. This allows preserving
* class inheritance values and member functions/proxy instances, but runs
* the risk that the raw object can be modified through side affects.
*/
addRaw: (imageId: string, payload: { metadata: any; type: string }) => {
const type = payload.type;
if (!state[imageId]) {
state[imageId] = {};
}
// Use the raw metadata here
state[imageId][type] = payload.metadata;
},
/**
* Returns the metadata for an imageId if it exists.
* @param type - the type of metadata to enquire about
* @param imageId - the imageId to enquire about
*/
get: (type: string, imageId: string): any => {
return state[imageId]?.[type];
},
/**
* Clears all metadata.
*/
clear: (): void => {
state = {};
},
};
addProvider(metadataProvider.get);
export default metadataProvider;
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