Add static page config and handler

5 files changed, 71 insertions, 23 deletions

diff --git a/src/app.ts b/src/app.ts
index c43f31d..3370d27 100755
--- a/src/app.ts
+++ b/src/app.ts
@@ -6,6 +6,7 @@ import frontend from "./routes/frontend.js";
 import activitypub from "./routes/activitypub.js";
 import event from "./routes/event.js";
 import group from "./routes/group.js";
+import staticPages from "./routes/static.js";
 
 import { initEmailService } from "./lib/email.js";
 
@@ -53,6 +54,7 @@ app.use(express.json({ type: "application/json" }));
 app.use(express.urlencoded({ extended: true }));
 
 // Router //
+app.use("/", staticPages);
 app.use("/", frontend);
 app.use("/", activitypub);
 app.use("/", event);
diff --git a/src/lib/config.ts b/src/lib/config.ts
index 7b35b98..7366b59 100644
--- a/src/lib/config.ts
+++ b/src/lib/config.ts
@@ -2,6 +2,12 @@ import fs from "fs";
 import toml from "toml";
 import { exitWithError } from "./process.js";
 
+interface StaticPage {
+    title: string;
+    path: string;
+    filename: string;
+}
+
 interface GathioConfig {
     general: {
         domain: string;
@@ -25,9 +31,21 @@ interface GathioConfig {
     sendgrid?: {
         api_key: string;
     };
+    static_pages: StaticPage[];
+}
+
+interface FrontendConfig {
+    domain: string;
+    siteName: string;
+    isFederated: boolean;
+    emailLogoUrl: string;
+    showKofi: boolean;
+    showInstanceInformation: boolean;
+    staticPages: StaticPage[];
+    version: string;
 }
 
-export const publicConfig = () => {
+export const frontendConfig = (): FrontendConfig => {
     const config = getConfig();
     return {
         domain: config.general.domain,
@@ -35,6 +53,9 @@ export const publicConfig = () => {
         isFederated: config.general.is_federated,
         emailLogoUrl: config.general.email_logo_url,
         showKofi: config.general.show_kofi,
+        showInstanceInformation: config.static_pages.length > 0,
+        staticPages: config.static_pages,
+        version: process.env.npm_package_version || "unknown",
     };
 };
 
diff --git a/src/routes/static.ts b/src/routes/static.ts
new file mode 100644
index 0000000..f57d1db
--- /dev/null
+++ b/src/routes/static.ts
@@ -0,0 +1,34 @@
+import { Router, Request, Response } from "express";
+import fs from "fs";
+import getConfig, { frontendConfig } from "../lib/config.js";
+import { markdownToSanitizedHTML } from "../util/markdown.js";
+
+const config = getConfig();
+const router = Router();
+
+config.static_pages
+    .filter((page) => page.path?.startsWith("/") && page.filename)
+    .forEach((page) => {
+        router.get(page.path, (_: Request, res: Response) => {
+            try {
+                if (fs.existsSync(`./static/${page.filename}`)) {
+                    const fileBody = fs.readFileSync(
+                        `./static/${page.filename}`,
+                        "utf-8",
+                    );
+                    const parsed = markdownToSanitizedHTML(fileBody);
+                    return res.render("static", {
+                        title: page.title,
+                        content: parsed,
+                        ...frontendConfig(),
+                    });
+                }
+                return res.status(404).render("404", frontendConfig());
+            } catch (err) {
+                console.error(err);
+                return res.status(404).render("404", frontendConfig());
+            }
+        });
+    });
+
+export default router;
diff --git a/src/util/config.ts b/src/util/config.ts
deleted file mode 100644
index d1fd05b..0000000
--- a/src/util/config.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-import getConfig from "../lib/config.js";
-
-const config = getConfig();
-
-interface FrontendConfig {
-    domain: string;
-    email: string;
-    siteName: string;
-    showKofi: boolean;
-    isFederated: boolean;
-}
-
-export const frontendConfig = (): FrontendConfig => ({
-    domain: config.general.domain,
-    email: config.general.email,
-    siteName: config.general.site_name,
-    showKofi: config.general.show_kofi,
-    isFederated: config.general.is_federated,
-});
diff --git a/src/util/markdown.ts b/src/util/markdown.ts
index 9f5d384..bab50bd 100644
--- a/src/util/markdown.ts
+++ b/src/util/markdown.ts
@@ -1,7 +1,6 @@
-// Extra marked renderer (used to render plaintext event description for page metadata)
-// Adapted from https://dustinpfister.github.io/2017/11/19/nodejs-marked/
-
 import { marked } from "marked";
+import { JSDOM } from "jsdom";
+import DOMPurify from "dompurify";
 
 // ? to ? helper
 function htmlEscapeToText(text: string) {
@@ -14,6 +13,9 @@ function htmlEscapeToText(text: string) {
     });
 }
 
+// Extra marked renderer (used to render plaintext event description for page metadata)
+// Adapted from https://dustinpfister.github.io/2017/11/19/nodejs-marked/
+
 export const renderPlain = () => {
     var render = new marked.Renderer();
     // render just the text of a link, strong, em
@@ -42,3 +44,11 @@ export const renderPlain = () => {
     };
     return render;
 };
+
+export const markdownToSanitizedHTML = (markdown: string) => {
+    const html = marked.parse(markdown);
+    const window = new JSDOM("").window;
+    const purify = DOMPurify(window);
+    const clean = purify.sanitize(html);
+    return clean;
+};