From dff548b372cef6af82e0932424622fc3efc9ca05 Mon Sep 17 00:00:00 2001
From: Merlin Beutlberger <m.beutlberger@sap.com>
Date: Fri, 9 Aug 2019 15:28:41 +0200
Subject: [PATCH] Handle local dependencies correctly

Especially libraries where not handled correctly.
ABAP URI retrieval now moved to type formatters
---
 lib/middleware/proxyRewrite.js | 28 +++++++++------
 lib/proxyConfiguration.js      | 66 ++++++++++++++++++++++++++++------
 2 files changed, 73 insertions(+), 21 deletions(-)

diff --git a/lib/middleware/proxyRewrite.js b/lib/middleware/proxyRewrite.js
index 2b76aa78..94397207 100644
--- a/lib/middleware/proxyRewrite.js
+++ b/lib/middleware/proxyRewrite.js
@@ -1,14 +1,17 @@
 const log = require("@ui5/logger").getLogger("server:middleware:proxyRewrite");
 
 function createMiddleware({resources, configuration, cdnUrl}) {
-	const resourceRootPath = !configuration.appOnly && configuration.destination.ui5Root;
-	const applicationRootPath = configuration.destination.appRoot;
+	const rewriteRootPaths = configuration.rewriteRootPaths;
+
 	const cacheBusterRegex = /~.*~[A-Z0-9]?\/?/;
 	const preloadRegex = /^.*(?:Component-preload\.js|library-preload\.js|library-preload\.json)$/i;
 
 	return function proxyRewrite(req, res, next) {
-		if ((!resourceRootPath || req.path.indexOf(resourceRootPath) === -1) &&
-				(!applicationRootPath || req.path.indexOf(applicationRootPath) === -1)) {
+		const rewriteApplicable = Object.keys(rewriteRootPaths).some((resourceRootPath) => {
+			return req.path.indexOf(resourceRootPath) !== -1;
+		});
+
+		if (!rewriteApplicable) {
 			// No normalization applicable
 			next();
 			return;
@@ -82,14 +85,19 @@ function createMiddleware({resources, configuration, cdnUrl}) {
 	async function normalizeRequestPath(reqPath) {
 		let normalizedPath = reqPath;
 
-		if (resourceRootPath && normalizedPath.indexOf(resourceRootPath) !== -1) {
-			normalizedPath = normalizedPath.substr(resourceRootPath.length);
-		} else if (applicationRootPath && normalizedPath.indexOf(applicationRootPath) !== -1) {
-			normalizedPath = normalizedPath.substr(applicationRootPath.length);
+		// Strip off first matching rewrite root path
+		for (const rootPath in rewriteRootPaths) {
+			if (rewriteRootPaths.hasOwnProperty(rootPath)) {
+				if (normalizedPath.indexOf(rootPath) !== -1) {
+					normalizedPath = normalizedPath.substr(rootPath.length);
+					if (rewriteRootPaths[rootPath].rewriteTo) {
+						normalizedPath = rewriteRootPaths[rootPath].rewriteTo + normalizedPath;
+					}
+					break;
+				}
+			}
 		}
-
 		normalizedPath = normalizedPath.replace(cacheBusterRegex, "");
-
 		return rewriteSpecials(normalizedPath);
 	}
 
diff --git a/lib/proxyConfiguration.js b/lib/proxyConfiguration.js
index dc17320f..caaf0bae 100644
--- a/lib/proxyConfiguration.js
+++ b/lib/proxyConfiguration.js
@@ -1,5 +1,4 @@
-const log = require("@ui5/logger").getLogger("proxyConfiguration");
-const {resourceFactory} = require("@ui5/fs");
+const log = require("@ui5/logger").getLogger("server:proxyConfiguration");
 
 const proxyConfigurations = {};
 
@@ -10,6 +9,9 @@ function addConfiguration(name, proxyConfig) {
 	if (proxyConfigurations[name]) {
 		throw new Error(`proxyConfiguration: A configuration with name ${name} is already known`);
 	}
+	if (proxyConfig.rewriteRootPaths) {
+		throw new Error(`Proxy Configuration ${name} must not define "rewriteRootPaths"`);
+	}
 
 	if (!proxyConfig.destination) {
 		proxyConfig.destination = {};
@@ -26,23 +28,65 @@ async function getConfigurationForProject(project) {
 		throw new Error(`Found multiple proxy configurations. ` +
 			`This is not yet supported.`); // TODO
 	}
+
+	log.verbose(`Applying proxy configuration ${configNames[0]} to project ${project.metadata.name}...`);
 	const config = JSON.parse(JSON.stringify(proxyConfigurations[configNames[0]]));
+	config.rewriteRootPaths = {};
+
+	if (config.destination.ui5Root && !config.appOnly) {
+		log.verbose(`Using configured "destination.ui5Root": ${config.destination.ui5Root}`);
+		config.rewriteRootPaths[config.destination.ui5Root] = {
+			rewriteTo: ""
+		};
+	}
+
+	mapProjectDependencies(project, (proj) => {
+		if (proj.specVersion !== "1.1a") {
+			log.warn(`Project ${project.metadata.name} defines specification version ${proj.specVersion}. ` +
+				`Some proxy configuration features require projects to define specification version 1.1a`);
+		}
+		log.verbose(`Using ABAP URI ${proj.metadata.abapUri} from metadata of project ${proj.metadata.name}`);
+		let prefix = "";
+		if (proj.type !== "application") {
+			if (project.resources.pathMappings["/resources"]) {
+				// If the project defines a /resources path mapping,
+				//	we expect this to match the ABAP URI deployment path
+				prefix += "/resources/";
+
+				// If this is not an application and there is no /resources path mapping, somebody does something wild
+				//	and hopefully knows what he/she does
+			}
+			prefix += proj.metadata.namespace;
+		}
+		config.rewriteRootPaths[proj.metadata.abapUri] = {
+			rewriteTo: prefix
+		};
+	});
 
-	const {source} = resourceFactory.createCollectionsForTree(project);
-	const manifestResource = await source.byPath("/manifest.json");
-	if (manifestResource) {
-		const manifest = JSON.parse(await manifestResource.getBuffer());
-		if (manifest["sap.platform.abap"] && manifest["sap.platform.abap"].uri) {
-			log.verbose(`Using sap.platform.abap URI configuration as application root ` +
-				`path: ${manifest["sap.platform.abap"].uri}`);
-			config.destination.appRoot = manifest["sap.platform.abap"].uri;
+	if (log.isLevelEnabled("verbose")) {
+		log.verbose(`Configured ${config.rewriteRootPaths.length} root paths to rewrite for ` +
+			`project ${project.metadata.name};`);
+		for (const abapUri in config.rewriteRootPaths) {
+			if (config.rewriteRootPaths.hasOwnProperty(abapUri)) {
+				if (config.rewriteRootPaths[abapUri].rewriteTo) {
+					log.verbose(`Rewriting ${abapUri} to ${config.rewriteRootPaths[abapUri].rewriteTo}`);
+				} else {
+					log.verbose(`Rewriting ${abapUri}`);
+				}
+			}
 		}
 	}
-	log.verbose(`UI5 root path configured as: ${config.destination.ui5Root}`);
 
 	return config;
 }
 
+function mapProjectDependencies(tree, handler) {
+	handler(tree);
+	tree.dependencies.map((dep) => {
+		mapProjectDependencies(dep, handler);
+	});
+}
+
 module.exports = {
 	addConfiguration,
 	getConfigurationForProject