feat(sistent): make pagination dynamic via graphql

Signed-off-by: Rishi Raj <rishiraj438gt@gmail.com>

Author: rishiraj38

src/components/SistentNavigation/content.js

@@ -1,31 +1,108 @@
 import React, { useEffect, useState } from "react";
+import { graphql, useStaticQuery } from "gatsby";
 
-import { content } from "./content";
 import Button from "../../reusecore/Button";
 import PaginationWrapper from "./pagination.style";
 
+const STABLE_ROUTES = [
+  // Getting Started
+  { link: "/projects/sistent/getting-started/about", text: "About" },
+  { link: "/projects/sistent/getting-started/installation", text: "Installation" },
+  { link: "/projects/sistent/getting-started/usage", text: "Usage" },
+  { link: "/projects/sistent/getting-started/tokens", text: "Tokens" },
+
+  // Identity
+  { link: "/projects/sistent/identity/color", text: "Colors" },
+  { link: "/projects/sistent/identity/color/guidance", text: "Colors" },
+  { link: "/projects/sistent/identity/color/code", text: "Colors" },
+  { link: "/projects/sistent/identity/spacing", text: "Spacing" },
+  { link: "/projects/sistent/identity/spacing/guidance", text: "Spacing" },
+  { link: "/projects/sistent/identity/spacing/code", text: "Spacing" },
+  { link: "/projects/sistent/identity/typography", text: "Typography" },
+  { link: "/projects/sistent/identity/typography/guidance", text: "Typography" },
+  { link: "/projects/sistent/identity/typography/code", text: "Typography" },
+];
+
+const PAGE_TYPE_ORDER = {
+  overview: 1,
+  guidance: 2,
+  code: 3,
+};
+
 const SistentPagination = () => {
   const [currentPage, setCurrentPage] = useState(0);
 
+  const data = useStaticQuery(graphql`
+    query SistentPaginationNav {
+      allMdx(
+        filter: {
+          fields: { collection: { eq: "sistent" } }
+        }
+      ) {
+        nodes {
+          frontmatter {
+            name
+            component
+            published
+          }
+          fields {
+            slug
+            pageType
+          }
+        }
+      }
+    }
+  `);
+
+  // Compile set of published components based on overview pages
+  const publishedComponents = new Set();
+  data.allMdx.nodes.forEach((node) => {
+    if (node.fields.pageType === "overview" && node.frontmatter.published === true) {
+      publishedComponents.add(node.frontmatter.component);
+    }
+  });
+
+  // Map, filter out drafts, and group by tab order: overview -> guidance -> code
+  const dynamicRoutes = data.allMdx.nodes
+    .map((node) => ({
+      componentSlug: node.frontmatter.component,
+      name: node.frontmatter.name || node.frontmatter.component,
+      link: node.fields.slug,
+      pageType: node.fields.pageType,
+    }))
+    .filter((node) => publishedComponents.has(node.componentSlug))
+    .sort((a, b) => {
+      if (a.componentSlug !== b.componentSlug) {
+        return (a.componentSlug || "").localeCompare(b.componentSlug || "");
+      }
+      return (
+        (PAGE_TYPE_ORDER[a.pageType] || 99) - (PAGE_TYPE_ORDER[b.pageType] || 99)
+      );
+    });
+
+  const fullContentArray = [...STABLE_ROUTES, ...dynamicRoutes];
+
   useEffect(() => {
     const path = window.location.pathname;
-    const index = content.findIndex((x) => x.link === path);
+    // Handle trajectory slashes
+    const cleanPath = path.endsWith("/") && path.length > 1 ? path.slice(0, -1) : path;
+    const index = fullContentArray.findIndex((x) => x.link === cleanPath);
     setCurrentPage(index);
-  }, []);
+  }, [fullContentArray]);
 
   return (
     <PaginationWrapper>
       {currentPage > 0 ? (
-        <Button $secondary $url={content[currentPage - 1]?.link}>
+        <Button $secondary $url={fullContentArray[currentPage - 1]?.link}>
           &larr; Previous
         </Button>
-      ) : null}
+      ) : <div />}
 
-      {currentPage < content.length - 1 ? (
-        <Button $primary $url={content[currentPage + 1]?.link}>
+      {currentPage !== -1 && currentPage < fullContentArray.length - 1 ? (
+        <Button $primary $url={fullContentArray[currentPage + 1]?.link}>
           Next &rarr;
         </Button>
-      ) : null}
+      ) : <div />}
     </PaginationWrapper>
   );
 };