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// So metadata can be provided in different ways (e.g. by parsing DICOM P10 or by a WADO-RS document)
import type { MetadataModuleType } from './types';
import { getAddModuleType } from './enums';
const providers = [];
const typedProviderValueMap = new Map<string, TypedProviderValue[]>();
const typedProviderMap = new Map<string, TypedProviderBound>();
export type TypedProviderValue = {
provider: TypedProvider;
priority: number;
isDefault: boolean;
/** Clears any data from this instance */
clear?: () => void;
/** Clears just this type/query pair */
clearQuery?: (query: string) => void;
};
export type TypedProvider = (
next: TypedProviderBound,
query: string,
data?,
options?
) => unknown;
export type TypedProviderBound = (query: string, data?, options?) => unknown;
/**
* Adds a metadata provider with the specified priority
* @param provider - Metadata provider function
* @param priority - 0 is default/normal, > 0 is high, < 0 is low
*
* @category MetaData
*/
export function addProvider(
provider: (type: string, ...query: string[]) => unknown,
priority = 0
): void {
if (providers.some((p) => p.provider === provider)) {
return;
}
let i;
// Find the right spot to insert this provider based on priority
for (i = 0; i < providers.length; i++) {
if (providers[i].priority <= priority) {
break;
}
}
// Insert the decode task at position i
providers.splice(i, 0, {
priority,
provider,
});
}
const nullProvider = (_query, _data, options) => options?.defaultValue;
function insertPriority(
type: string,
list,
provider,
options
): TypedProviderBound {
const providerValue = { type, ...options, provider };
Eif (!list.find((it) => it.provider === provider)) {
let i;
const { priority = 0 } = options;
// Find the right spot to insert this provider based on priority
for (i = 0; i < list.length; i++) {
if (list[i].priority <= priority) {
break;
}
}
// Insert the decode task at position i
list.splice(i, 0, providerValue);
}
let currentProvider = nullProvider;
for (let i = list.length - 1; i >= 0; i--) {
const p = list[i].provider;
Eif (p) {
currentProvider = p.bind(null, currentProvider);
}
}
return currentProvider;
}
export interface TypedProviderOptions {
priority?: number;
requires?: string[];
isDefault?: boolean;
clear?: () => void;
clearQuery?: (query: string) => void;
}
/**
* Adds a typed provider at the given priority level
*
* Typed providers all run as part of the standard provider framework at
* priority -1000. They differ from regular providers in that each provider
* function handles exactly one type
*
* Note: All typed providers are included overall at priority "-1000" with the
* global priority - that is, at the last item so that the existing non-typed
* providers all run first.
*/
export function addTypedProvider(
type: string,
provider: TypedProvider,
options: TypedProviderOptions = { priority: 0, isDefault: true }
) {
Iif (!provider) {
throw new Error(
`addTypedProvider: cannot register undefined provider for type "${type}"`
);
}
let list = typedProviderValueMap.get(type);
if (!list) {
list = new Array<TypedProviderValue>();
typedProviderValueMap.set(type, list);
}
if (list.find((it) => it.provider === provider)) {
return;
}
const newProvider = insertPriority(type, list, provider, options);
Iif (!newProvider) {
throw new Error(`newProvider is empty for ${type}`);
}
typedProviderMap.set(type, newProvider);
}
/**
* Adds an add-path typed provider at the given priority level.
*
* The add-path provider chain is keyed by appending "Add" to the type and is
* resolved via add()/addTyped().
*/
export function addAddProvider(
type: string,
provider: TypedProvider,
options: TypedProviderOptions = { priority: 0, isDefault: true }
) {
addTypedProvider(getAddModuleType(type), provider, options);
}
/**
* A provider bridge for typed metadata modules.
*/
export function metadataModuleProvider(type: string, query: string, options) {
const typedProvider = typedProviderMap.get(type);
if (!typedProvider) {
return;
}
return typedProvider(query, null, options);
}
/**
* Removes the specified provider
*
* @param provider - Metadata provider function
*
* @category MetaData
*/
export function removeProvider(
provider: (type: string, query: unknown) => unknown
): void {
for (let i = 0; i < providers.length; i++) {
if (providers[i].provider === provider) {
providers.splice(i, 1);
break;
}
}
}
const TYPED_PROVIDER_BRIDGE_PRIORITY = -1000;
/**
* Removes all providers, clears all typed providers, and re-adds the typed
* provider bridge at the end so getMetaData can still resolve typed types
* after registerDefaultProviders() is called again.
*
* @category MetaData
*/
export function removeAllProviders(): void {
while (providers.length > 0) {
providers.pop();
}
typedProviderValueMap.clear();
typedProviderMap.clear();
}
/**
* Gets metadata from the registered metadata providers. Will call each one from highest priority to lowest
* until one responds
*
* @param type - The type of metadata requested from the metadata store
* @param query - The query for the metadata store, often imageId
* Some metadata providers support multi-valued strings, which are interpreted
* as the provider chooses.
*
* @returns The metadata retrieved from the metadata store
* @category MetaData
*/
// eslint-disable-next-line @typescript-eslint/no-explicit-any
export function getMetaData(type: string, query: string, options?): any {
// Invoke each provider in priority order until one returns something
Iif (query === undefined) {
return;
}
for (let i = 0; i < providers.length; i++) {
const result = providers[i].provider(type, query, options);
if (result !== undefined) {
return result;
}
}
}
/**
* Gets metadata with the return type inferred from the module type.
* Pass a name from MetadataModules (e.g. MetadataModules.COMPRESSED_FRAME_DATA) or the constant
* string (e.g. 'compressedFrameData'); T is inferred from MetadataModuleType.
* For module types not in that map, the return type is undefined (never in union).
*
* @param type - The metadata module type (MetadataModules constant or literal string)
* @param query - The query (e.g. imageId)
* @param options - Optional options (e.g. { frameIndex })
* @returns The result, typed per module, or undefined
* @category MetaData
*/
export function getTyped<K extends keyof MetadataModuleType | string>(
type: K,
query: string,
options?: unknown
):
| (K extends keyof MetadataModuleType ? MetadataModuleType[K] : never)
| undefined {
return getMetaData(type as string, query, options) as
| (K extends keyof MetadataModuleType ? MetadataModuleType[K] : never)
| undefined;
}
/**
* Performs metadata ingestion on the add-path provider chain.
* Uses the type key `${type}Add`.
*/
export function addMetaData(type: string, query: string, options?): unknown {
return getMetaData(getAddModuleType(type), query, options) as unknown;
}
/**
* Adds metadata with return type inferred from module type, same mapping as
* getTyped() but allowing async ingestion handlers.
*/
export function addTyped<K extends keyof MetadataModuleType | string>(
type: K,
query: string,
options?: unknown
):
| (K extends keyof MetadataModuleType ? MetadataModuleType[K] : never)
| Promise<K extends keyof MetadataModuleType ? MetadataModuleType[K] : never>
| undefined {
const result = addMetaData(type as string, query, options);
return result as
| (K extends keyof MetadataModuleType ? MetadataModuleType[K] : never)
| Promise<
K extends keyof MetadataModuleType ? MetadataModuleType[K] : never
>
| undefined;
}
/**
* Clears cached data on the specific type
* and query key
*/
export const clearQuery = (type: string, query?: string) => {
const typesToClear = [type, getAddModuleType(type)];
for (const currentType of typesToClear) {
const typedProviders = typedProviderValueMap.get(currentType);
if (!typedProviders) {
continue;
}
for (const providerInfo of typedProviders) {
providerInfo?.clearQuery?.(query);
}
}
};
/**
* Clears cached data on the specific type
* and query key
*/
export const clear = (type: string) => {
const typesToClear = Array.from(new Set([type, getAddModuleType(type)]));
for (const currentType of typesToClear) {
const typedProviders = typedProviderValueMap.get(currentType);
if (!typedProviders) {
continue;
}
for (const providerInfo of typedProviders) {
providerInfo?.clear?.();
}
}
};
export const get = (type: string, ...queries: string[]) =>
queries.length === 1
? getMetaData(type, queries[0])
: queries
.map((query) => query && getMetaData(type, query))
.find((it) => it !== undefined);
/**
* Retrieves metadata from a DICOM image and returns it as an object with capitalized keys.
* @param imageId - the imageId
* @param metaDataProvider - The metadata provider either wadors or wadouri
* @param types - An array of metadata types to retrieve.
* @returns An object containing the retrieved metadata with capitalized keys.
*/
export function getNormalized(
imageId: string,
types: string[],
metaDataProvider = getMetaData
) {
const result = {};
for (const t of types) {
try {
const data = metaDataProvider(t, imageId);
if (data) {
const capitalizedData = {};
for (const key in data) {
if (key in data) {
const capitalizedKey = toUpperCamelTag(key);
capitalizedData[capitalizedKey] = data[key];
}
}
Object.assign(result, capitalizedData);
}
} catch (error) {
console.error(`Error retrieving ${t} data:`, error);
}
}
return result;
}
/**
* Converts a tag name to UpperCamelCase
*/
export const toUpperCamelTag = (tag: string) => {
if (tag.startsWith('sop')) {
return `SOP${tag.substring(3)}`;
}
if (tag.startsWith('voi')) {
return `VOI${tag.substring(3)}`;
}
if (tag.endsWith('Id')) {
tag = `${tag.substring(0, tag.length - 2)}ID`;
}
return tag.charAt(0).toUpperCase() + tag.slice(1);
};
/**
* Converts a tag name to lowerCamelCase
*/
export const toLowerCamelTag = (tag: string) => {
if (tag.startsWith('SOP')) {
return `sop${tag.substring(3)}`;
}
if (tag.startsWith('VOI')) {
return `voi${tag.substring(3)}`;
}
if (tag.endsWith('ID') && !tag.endsWith('UID')) {
tag = `${tag.substring(0, tag.length - 2)}Id`;
}
return tag.charAt(0).toLowerCase() + tag.slice(1);
};
|