From aa99de4a6bd8e1e4119cde5be98f4531d562a72d Mon Sep 17 00:00:00 2001
From: Simon Seyock <seyock@terrestris.de>
Date: Fri, 16 Apr 2021 20:06:06 +0200
Subject: [PATCH] parse comment for templates

---
 config/jsdoc/plugins/inline-options.cjs | 68 +++++++++++++++++++++++--
 1 file changed, 63 insertions(+), 5 deletions(-)

diff --git a/config/jsdoc/plugins/inline-options.cjs b/config/jsdoc/plugins/inline-options.cjs
index 15d7fdeeb9..ce2d12f880 100644
--- a/config/jsdoc/plugins/inline-options.cjs
+++ b/config/jsdoc/plugins/inline-options.cjs
@@ -5,7 +5,48 @@
  * Inlines option params from typedefs
  */
 
-const properties = {};
+const docletInfos = {};
+
+/**
+ * This parses the comment for `@template` annotations and returns an object with name / type pairs for all template
+ * values
+ * @param {string} comment a jsdoc comment to parse
+ * @return {Object<string, string>} results
+ */
+function parseCommentForTemplates(comment) {
+  let remainingText = comment;
+  const results = {};
+  while (true) {
+    const templateMatch = remainingText.match(/\* @template\s*([\s\S]*)/);
+
+    if (!templateMatch) {
+      return results;
+    }
+
+    remainingText = templateMatch[1];
+
+    let type = '*';
+
+    if (remainingText[0] === '{') {
+      let index = 1;
+      let openParenthesis = 1;
+      while (openParenthesis > 0) {
+        if (remainingText[index] === '{') {
+          openParenthesis++;
+        } else if (remainingText[index] === '}') {
+          openParenthesis--;
+        }
+        index++;
+      }
+      type = remainingText.slice(1, index - 1);
+      remainingText = remainingText.slice(index);
+    }
+
+    const name = remainingText.match(/\s*(\S*)/)[1];
+
+    results[name] = type;
+  }
+}
 
 exports.handlers = {
   /**
@@ -14,7 +55,9 @@ exports.handlers = {
    */
   newDoclet: function (e) {
     if (e.doclet.kind == 'typedef' && e.doclet.properties) {
-      properties[e.doclet.longname] = e.doclet.properties;
+      docletInfos[e.doclet.longname] = {
+        properties: e.doclet.properties,
+      };
     }
   },
 
@@ -25,6 +68,16 @@ exports.handlers = {
    */
   parseComplete: function (e) {
     const doclets = e.doclets;
+
+    // gather type information
+    for (let i = 0, ii = doclets.length; i < ii; ++i) {
+      const doclet = doclets[i];
+      if (doclet.longname in docletInfos) {
+        docletInfos[doclet.longname].type = doclet.type;
+      }
+    }
+
+    // inline options
     for (let i = 0, ii = doclets.length; i < ii; ++i) {
       const doclet = doclets[i];
       if (doclet.params) {
@@ -37,13 +90,18 @@ exports.handlers = {
             if (genericMatches) {
               type = genericMatches[1];
             }
-            if (type in properties) {
-              param.type.names[0] = type;
+            if (type in docletInfos) {
+              const templateInfo = parseCommentForTemplates(doclet.comment);
+              param.type = docletInfos[type].type;
               params.push.apply(
                 params,
-                properties[type].map((p) => {
+                docletInfos[type].properties.map((p) => {
                   const property = Object.assign({}, p);
                   property.name = `${param.name}.${property.name}`;
+                  if (property.type.names[0] in templateInfo) {
+                    property.type.names[0] =
+                      templateInfo[property.type.names[0]];
+                  }
                   return property;
                 })
               );