From 1fc550127e85a71b65ad1722df63eb42407f1bc1 Mon Sep 17 00:00:00 2001
From: Nathan Woulfe <nathan@nathanw.com.au>
Date: Thu, 2 Mar 2023 14:46:15 +1000
Subject: [PATCH] macro service

---
 .../libs/macro/macro.service.ts               | 151 ++++++++++++++++++
 .../libs/macro/rollup.config.js               |   4 +
 2 files changed, 155 insertions(+)
 create mode 100644 src/Umbraco.Web.UI.Client/libs/macro/macro.service.ts
 create mode 100644 src/Umbraco.Web.UI.Client/libs/macro/rollup.config.js

diff --git a/src/Umbraco.Web.UI.Client/libs/macro/macro.service.ts b/src/Umbraco.Web.UI.Client/libs/macro/macro.service.ts
new file mode 100644
index 0000000000..9fc26a52d2
--- /dev/null
+++ b/src/Umbraco.Web.UI.Client/libs/macro/macro.service.ts
@@ -0,0 +1,151 @@
+import { UmbContextToken } from "@umbraco-cms/context-api";
+
+export interface MacroSyntaxData { macroAlias: string, macroParamsDictionary: {[key: string]: string}, syntax?: string};
+
+export class UmbMacroService {
+
+    /** parses the special macro syntax like <?UMBRACO_MACRO macroAlias="Map" /> 
+     * and returns an object with the macro alias and it's parameters 
+     * */
+    parseMacroSyntax(syntax = '') {
+
+        //This regex will match an alias of anything except characters that are quotes or new lines (for legacy reasons, when new macros are created
+        // their aliases are cleaned an invalid chars are stripped)
+        const expression = /(<\?UMBRACO_MACRO (?:.+?)?macroAlias=["']([^\"\'\n\r]+?)["'][\s\S]+?)(\/>|>.*?<\/\?UMBRACO_MACRO>)/i;
+        const match = expression.exec(syntax);
+        
+        if (!match || match.length < 3) {
+            return null;
+        }
+        
+        const macroAlias = match[2];
+
+        //this will leave us with just the parameters
+        const paramsChunk = match[1].trim().replace(new RegExp("UMBRACO_MACRO macroAlias=[\"']" + macroAlias + "[\"']"), "").trim();
+        const paramExpression = /(\w+?)=['\"]([\s\S]*?)['\"]/g;
+
+        const returnVal: MacroSyntaxData = {
+            macroAlias,
+            macroParamsDictionary: {}
+        };
+
+        let paramMatch;
+        while ((paramMatch = paramExpression.exec(paramsChunk))) {
+            returnVal.macroParamsDictionary[paramMatch[1]] = paramMatch[2];
+        }
+
+        return returnVal;
+    }
+
+    /**
+     * generates the syntax for inserting a macro into a rich text editor - this is the very old umbraco style syntax     *
+     * @param {MacroSyntaxData} args an object containing the macro alias and it's parameter values
+     */
+    generateMacroSyntax(args: MacroSyntaxData) {
+
+        let macroString = `<?UMBRACO_MACRO macroAlias="${args.macroAlias}" `;
+
+        for (const [key, val] of Object.entries(args.macroParamsDictionary)) {
+            //check for null
+            const valOrEmpty = val ?? '';
+            //need to detect if the val is a string or an object
+            let keyVal;
+            if (typeof valOrEmpty === 'string') {
+                keyVal = `${key}="${valOrEmpty}"`;
+            }
+            else {
+                //if it's not a string we'll send it through the json serializer
+                const json = JSON.parse(valOrEmpty);
+                //then we need to url encode it so that it's safe
+                const encoded = encodeURIComponent(json);
+                keyVal = `${key}="${encoded}"`;
+            }
+
+            macroString += keyVal;
+        }        
+
+        macroString += '/>';
+
+        return macroString;
+    }
+
+    /**
+     * generates the syntax for inserting a macro into an mvc template     *
+     * @param {object} args an object containing the macro alias and it's parameter values
+     */
+    generateMvcSyntax(args: MacroSyntaxData) {
+
+        let macroString = `@await Umbraco.RenderMacroAsync("${args.macroAlias}"`;
+
+        let hasParams = false;
+        let paramString = '';
+        if (args.macroParamsDictionary) {
+
+            paramString = ', new {';
+
+            for (const [key, val] of Object.entries(args.macroParamsDictionary)) {
+                hasParams = true;
+
+                const keyVal = `${key}="${(val ? val : '')}", `;
+
+                paramString += keyVal;
+            }
+
+            //remove the last , and trailing whitespace
+            paramString = paramString.trimEnd().replace(/,*$/, '');
+            paramString += '}';
+        }
+
+        if (hasParams) {
+            macroString += paramString;
+        }
+
+        macroString += ')';
+
+        return macroString;
+    }
+
+    collectValueData(macro: any, macroParams: any, renderingEngine: any) {
+
+        const macroParamsDictionary: { [key: string]: string} = {};
+        const macroAlias = macro.alias;
+        if (!macroAlias) {
+            throw "The macro object does not contain an alias";
+        }
+
+        let syntax;
+
+        macroParams.forEach((item: any) => {
+            let val = item.value;
+            if (item.value !== null && item.value !== undefined && typeof item.value !== 'string') {
+                try {
+                    val = JSON.parse(val);
+                }
+                catch (e) {
+                    // not json
+                }
+            }
+
+            //each value needs to be xml escaped!! since the value get's stored as an xml attribute
+            macroParamsDictionary[item.alias] = encodeURIComponent(val);
+        });
+
+        //get the syntax based on the rendering engine
+        if (renderingEngine && renderingEngine.toLowerCase() === 'mvc') {
+            syntax = this.generateMvcSyntax({ macroAlias, macroParamsDictionary });
+        }
+        else {
+            syntax = this.generateMacroSyntax({ macroAlias, macroParamsDictionary });
+        }
+
+        return {
+            macroParamsDictionary,
+            macroAlias,
+            syntax,
+        };
+    }
+}
+
+export const UMB_MACRO_SERVICE_CONTEXT_TOKEN = new UmbContextToken<UmbMacroService>(
+	UmbMacroService.name
+);
\ No newline at end of file
diff --git a/src/Umbraco.Web.UI.Client/libs/macro/rollup.config.js b/src/Umbraco.Web.UI.Client/libs/macro/rollup.config.js
new file mode 100644
index 0000000000..945c0afe88
--- /dev/null
+++ b/src/Umbraco.Web.UI.Client/libs/macro/rollup.config.js
@@ -0,0 +1,4 @@
+import config from '../../utils/rollup.config.js';
+export default {
+	...config,
+};