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import { ControllerClass } from "./controller-metadata.ts";import { Type } from "./deps.ts";import { MvTransformer, TransformerMetadata } from "./mv-transformer.ts";
export class TransformerCatalog {  private static readonly globalCatalog: TransformerMetadata[] = [];  private static readonly catalog = new Map<    Type,    {      actions: {        [action: string]: {          parameters: TransformerMetadata[][];          transformers: TransformerMetadata[];        };      };      transformers: TransformerMetadata[];    }  >();
  static registerTransformer(    transformer:      | MvTransformer      | Type<MvTransformer>,    type: ControllerClass,    action?: string,    parameterIndex?: number,    priority?: number,  ) {    let controllerRegistration = this.catalog.get(type);    if (!controllerRegistration) {      controllerRegistration = { actions: {}, transformers: [] };      this.catalog.set(type, controllerRegistration);    }    if (!action) {      controllerRegistration.transformers.push({ transformer, priority });      return;    }    let actionRegistration = controllerRegistration.actions[action];    if (!actionRegistration) {      actionRegistration = { parameters: [], transformers: [] };      controllerRegistration.actions[action] = actionRegistration;    }    if (parameterIndex === undefined) {      actionRegistration.transformers.push({ transformer, priority });      return;    }    let parameters = actionRegistration.parameters[parameterIndex];    if (!parameters) {      parameters = [];      actionRegistration.parameters[parameterIndex] = parameters;    }    parameters.push({ transformer, priority });  }
  static registerGlobalTransformer(    transformer: MvTransformer | Type<MvTransformer>,    priority?: number,  ) {    this.globalCatalog.push({ transformer, priority });  }
  static getTransformers(    type: ControllerClass,    action: string,    parameterIndex: number,  ) {    const transformers = [      ...this.catalog.get(type)?.transformers ?? [],      ...this.catalog.get(type)?.actions[action].transformers ?? [],      ...this.catalog.get(type)?.actions[action].parameters[parameterIndex] ??        [],    ];    transformers.sort((a, b) => (a?.priority ?? 0) - (b?.priority ?? 0));    return transformers.map((t) => t.transformer);  }}