From f107cc441311b85a250de84644578501b403cc39 Mon Sep 17 00:00:00 2001
From: AakashGC <aakashguptachoudhury@gmail.com>
Date: Mon, 18 Mar 2024 00:02:24 +1100
Subject: [PATCH] added ability to redirect to external pages

---
 .../assets/scripts/index.js                   | 38 +++++++++++++++++++
 .../theme/quantecon_book_theme/layout.html    | 11 ++++--
 .../theme/quantecon_book_theme/theme.conf     |  1 +
 3 files changed, 46 insertions(+), 4 deletions(-)

diff --git a/src/quantecon_book_theme/assets/scripts/index.js b/src/quantecon_book_theme/assets/scripts/index.js
index 2f28dd6..9b35742 100644
--- a/src/quantecon_book_theme/assets/scripts/index.js
+++ b/src/quantecon_book_theme/assets/scripts/index.js
@@ -376,6 +376,44 @@ document.addEventListener("DOMContentLoaded", function () {
     );
   })();
 
+  /**
+   * Redirect to a URL and paste the content in admonition
+   */
+  (function () {
+    let redirect = document.getElementById("redirect");
+    console.log(redirect, "redirect url");
+    if (redirect) {
+      window.location.href =
+        redirect.getAttribute("data-url") +
+        "?redirected_from=" +
+        window.location.pathname +
+        "&content=" +
+        redirect.getAttribute("data-content");
+    }
+  })();
+
+  /**
+   * Get the path redirected from
+   */
+  (function () {
+    let redirectedFrom = window.location.search;
+    if (redirectedFrom.includes("redirected_from")) {
+      // Create a URLSearchParams object from the query string
+      var searchParams = new URLSearchParams(redirectedFrom);
+      // Get the value of a particular variable from the query string
+      var redirectedFromUrl = searchParams.get("redirected_from");
+      var redirectedFromContent = searchParams.get("content");
+      if (redirectedFromContent) {
+        var admonition = document.getElementsByClassName(
+          "redirect-admonition",
+        )[0];
+        admonition.classList.remove("hidden");
+        var para = admonition.getElementsByTagName("p")[1];
+        para.innerHTML = redirectedFromContent;
+      }
+    }
+  })();
+
   /**
    * Add authors to the heading of toc page
    */
diff --git a/src/quantecon_book_theme/theme/quantecon_book_theme/layout.html b/src/quantecon_book_theme/theme/quantecon_book_theme/layout.html
index 5532d52..93975be 100644
--- a/src/quantecon_book_theme/theme/quantecon_book_theme/layout.html
+++ b/src/quantecon_book_theme/theme/quantecon_book_theme/layout.html
@@ -85,9 +85,14 @@
     <div class="qe-wrapper">
 
         <div class="qe-main">
-
+            {%- if pagename in theme_redirects %}
+                <div id="redirect" data-url="{{theme_redirects[pagename]['url']}}" data-content="{{theme_redirects[pagename]['redirect_text']}}"></div>
+            {%- endif %}
             <div class="qe-page" id={{pagename}}>
-
+                <div class="redirect-admonition warning admonition hidden">
+                    <p class="admonition-title">Redirected Page</p>
+                    <p></p>
+                </div>
                 <div class="qe-page__toc">
 
                     <div class="inner">
@@ -99,8 +104,6 @@
                             On this page
                         </div>
                         {%- endif %}
-
-
                         <nav id="bd-toc-nav" class="qe-page__toc-nav">
                             {{ page_toc }}
                             <p class="logo">
diff --git a/src/quantecon_book_theme/theme/quantecon_book_theme/theme.conf b/src/quantecon_book_theme/theme/quantecon_book_theme/theme.conf
index 547c55f..6d065e9 100644
--- a/src/quantecon_book_theme/theme/quantecon_book_theme/theme.conf
+++ b/src/quantecon_book_theme/theme/quantecon_book_theme/theme.conf
@@ -31,3 +31,4 @@ persistent_sidebar = False
 dark_logo =
 authors =
 mainpage_author_fontsize = 18
+redirects =