From e15fb2a07be16e1a33c75f615456a4f2bc89845b Mon Sep 17 00:00:00 2001
From: Artemy <artegoser@gmail.com>
Date: Sun, 13 Aug 2023 21:39:23 +0300
Subject: [PATCH] feat: handlers

---
 package-lock.json                 |  4 ++--
 package.json                      |  3 ++-
 src/app.ts                        | 23 +++++++++++++----------
 src/handlers/handler.interface.ts |  6 ++++++
 src/handlers/main.ts              | 16 ++++++++++++++++
 src/handlers/readability.ts       | 22 ++++++++++++++++++++++
 6 files changed, 61 insertions(+), 13 deletions(-)
 create mode 100644 src/handlers/handler.interface.ts
 create mode 100644 src/handlers/main.ts
 create mode 100644 src/handlers/readability.ts

diff --git a/package-lock.json b/package-lock.json
index 81f6f87..0f1517c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,11 +1,11 @@
 {
-  "name": "dottxt",
+  "name": "txtdot",
   "version": "1.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
-      "name": "dottxt",
+      "name": "txtdot",
       "version": "1.0.0",
       "license": "ISC",
       "dependencies": {
diff --git a/package.json b/package.json
index 812a179..ee6e0a8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,7 @@
 {
-  "name": "dottxt",
+  "name": "txtdot",
   "version": "1.0.0",
+  "private": true,
   "description": "",
   "main": "dist/app.js",
   "dependencies": {
diff --git a/src/app.ts b/src/app.ts
index a58cb28..4f29887 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -1,10 +1,9 @@
 import { IConfigService } from "./config/config.interface";
 import { ConfigService } from "./config/config.service";
 import express from "express";
-import axios from "axios";
-import { JSDOM } from "jsdom";
-import { Readability } from "@mozilla/readability";
 import NodeCache from "node-cache";
+import { readability } from "./handlers/readability";
+import minify from "./handlers/main";
 
 class App {
   config: IConfigService;
@@ -37,12 +36,8 @@ class App {
       const url = (req.query.url || "/nothing") as string;
       const type = (req.query.type || "html") as string;
 
-      axios
-        .get(url)
-        .then((response) => {
-          const dom = new JSDOM(response.data, { url: url });
-          const reader = new Readability(dom.window.document);
-          const parsed = reader.parse();
+      minify(url)
+        .then((parsed) => {
           const content =
             type === "html" ? parsed?.content : parsed?.textContent;
 
@@ -50,10 +45,18 @@ class App {
           res.send(content);
         })
         .catch((err) => {
-          res.status(500).send(err);
+          res.status(500).send({ error: err.message });
         });
     });
 
+    app.get("/readability", async (req, res) => {
+      const url = (req.query.url || "/nothing") as string;
+      const parsed = await readability(url);
+
+      this.cache.set(req.originalUrl || req.url, parsed);
+      res.send(parsed);
+    });
+
     app.listen(this.config.get("PORT"), () => {
       console.log(`Listening on port ${this.config.get("PORT")}`);
     });
diff --git a/src/handlers/handler.interface.ts b/src/handlers/handler.interface.ts
new file mode 100644
index 0000000..26c2053
--- /dev/null
+++ b/src/handlers/handler.interface.ts
@@ -0,0 +1,6 @@
+export interface IHandlerOutput {
+  content: string;
+  textContent: string;
+  title: string;
+  lang: string;
+}
diff --git a/src/handlers/main.ts b/src/handlers/main.ts
new file mode 100644
index 0000000..2757e2f
--- /dev/null
+++ b/src/handlers/main.ts
@@ -0,0 +1,16 @@
+import { IHandlerOutput } from "./handler.interface";
+import { readability } from "./readability";
+
+export default function minify(url: string): Promise<IHandlerOutput> {
+  const host = new URL(url).hostname;
+
+  return fallback[host]?.(url) || fallback["*"](url);
+}
+
+const fallback: Fallback = {
+  "*": readability,
+};
+
+interface Fallback {
+  [host: string]: (url: string) => Promise<IHandlerOutput>;
+}
diff --git a/src/handlers/readability.ts b/src/handlers/readability.ts
new file mode 100644
index 0000000..0a6f39a
--- /dev/null
+++ b/src/handlers/readability.ts
@@ -0,0 +1,22 @@
+import { Readability } from "@mozilla/readability";
+import axios from "axios";
+import { JSDOM } from "jsdom";
+import { IHandlerOutput } from "./handler.interface";
+
+export async function readability(url: string): Promise<IHandlerOutput> {
+  const response = await axios.get(url);
+  const dom = new JSDOM(response.data, { url: url });
+  const reader = new Readability(dom.window.document);
+  const parsed = reader.parse();
+
+  if (!parsed) {
+    throw new Error("Failed to parse [readability]");
+  }
+
+  return {
+    content: parsed.content,
+    textContent: parsed.textContent,
+    title: parsed.title,
+    lang: parsed.lang,
+  };
+}