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// Copyright 2020-2020 The Mandarine.TS Framework authors. All rights reserved. MIT license.
import { MandarineException } from "../../../main-core/exceptions/mandarineException.ts";import type { Mandarine } from "../../../main-core/Mandarine.ns.ts";import { ApplicationContext } from "../../../mod.ts";import { handleCors } from "./cors/corsMiddleware.ts";
export const ResourceHandlerMiddleware = () => {    return async (context: any, next: Function) => {        const typedContext: Mandarine.Types.RequestContext = context;        let resourceHandlerRegistry: Mandarine.MandarineCore.IResourceHandlerRegistry = ApplicationContext.getInstance().getResourceHandlerRegistry();
        let resources = resourceHandlerRegistry.getResourceHandlers();        for(let i = 0; i<resources.length; i++) {            let resourceHandler = resources[i];
            if(resourceHandler && resourceHandler.resourceHandlerPath && resourceHandler.resourceHandlerLocations && resourceHandler.resourceResolver) {                if(resourceHandler.resourceHandlerLocations.length === 0) {                    throw new MandarineException(MandarineException.NEEDED_RESOURCE_HANDLER_LOCATION);                }                for(let i = 0; i<resourceHandler.resourceHandlerPath.length; i++) {                    let resourceHandlerPath = resourceHandler.resourceHandlerPath[i];                    let resourceHandlerLocation = resourceHandler.resourceHandlerLocations[i];                    let resourceHandlerIndex;                    if(resourceHandler.resourceHandlerIndex != undefined && resourceHandler.resourceHandlerIndex.length > 0) resourceHandlerIndex = resourceHandler.resourceHandlerIndex[i];
                    let regex = new RegExp(typedContext.request.url.host + resourceHandlerPath.source);                    let search = typedContext.request.url.host + typedContext.request.url.pathname;                    let isMatch = regex.test(search);
                    if(isMatch) {                        let results = regex.exec(search);
                        if(results != (null || undefined)) {                            if(resourceHandler.resourceCors) {                                handleCors(typedContext, {                                    corsOptions: resourceHandler.resourceCors,                                    useDefaultCors: false                                });                            }                                                        let resource = results[1];                            let index: boolean = false;
                            if(resource === "" || resource == (null || undefined)) {                                if(resourceHandlerIndex != (null || undefined)) {                                    resource = `${resourceHandlerLocation}/${resourceHandlerIndex}`;                                    index = true;                                } else {                                    await next();                                    return;                                }                            }                                                        resource = (index) ? resource : `${resourceHandlerLocation}/${resource}`;                            const resourceData = resourceHandler.resourceResolver.resolve(typedContext, resource);                            typedContext.response.body = resourceData;                                                        if(resourceData) {                                // Resource is valid                                typedContext.isResource = true;                            }                        }                    }                }            }        }        await next();    }}