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import express, { json } from "express";
import { Deta } from "deta";
import { Validator as _Validator } from "jsonschema";
import path from "path";
import { fileURLToPath } from "url";
import cors from "cors";
import dotenv from "dotenv";
dotenv.config();
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const app = express();
const notallowed = ["dashboard", "list", ".html"];
const deta = Deta(
process.env.DETA_COLLECTION_KEY === null
? process.env.DETA_PROJECT_KEY
: process.env.DETA_COLLECTION_KEY
);
const db = deta.Base("shortlnk_db");
app.use(express.static(path.join(__dirname, "public")));
app.use((req, res, next) => {
res.setHeader("cache-control", "maxage=3600, immutable");
next();
});
function isValidURL(string) {
var res = string.match(
/(http(s)?:\/\/.)?(www\.)?[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\b([-a-zA-Z0-9@:%_\+.~#?&//=]*)/g
);
return res !== null;
}
app.use(cors());
app.use(json());
app.get("/", (req, res) => {
res.redirect("/dashboard");
});
app.get("/dashboard", (req, res) => {
res.sendFile(path.join(__dirname, "public", "/dashboard/index.html"));
});
app.get("/dashboard/list", (req, res) => {
res.sendFile(path.join(__dirname, "public", "/dashboard/list.html"));
});
app.get("/:id", async (req, res) => {
const id = req.params.id;
const item = await db.get(id);
if (id === undefined || item == null) {
res.sendFile(path.join(__dirname, "public", "404.html"));
} else {
let countURLRedirct = item.stats.clicks;
countURLRedirct++;
await db.update(
{
stats: {
clicks: countURLRedirct,
},
},
item.id
);
res.redirect(item.original_link);
}
});
app.get("/api/list", async (req, res) => {
const limit = req.query.l || 5;
const query = req.query.q;
const item = await db.fetch(query, limit);
res.status(200).json(item);
});
app.delete("/api/delete/:id", async (req, res) => {
const item = await db.get(req.params.id);
if (item) {
await db.delete(item.id);
res.status(200).json({
status: "200",
message: "delete item successfully",
});
} else if (!item) {
res.status(404).json({
status: "404",
message: "item could not be found",
});
}
});
app.post("/api/update/:id", async (req, res) => {
const data = req.body;
const idparam = req.params.id;
const valor = _Validator;
const v = new valor();
const schema = {
type: "object",
properties: {
original_link: {
type: "string",
},
id: {
type: "string",
},
},
required: ["id"],
};
const result = v.validate(
{
original_link: data.original_link,
id: data.id,
},
schema
);
const ifslash = /\/\w+/;
if (
result.errors.length > 0 ||
isValidURL(data.original_link) === false ||
notallowed.includes(data.id) ||
ifslash.test(data.id)
) {
res.status(400).json({
status: 400,
message: "bad request",
});
} else {
try {
await db.update(
{
original_link: data.original_link,
id: data.id,
origin_id: data.orgin_id,
},
idparam
);
res.status(200).json({
status: 200,
message: "updated successfully",
short_link: `${req.protocol}://${req.get("host")}/${data.id}`,
});
} catch {
res.status(404).json({
status: 404,
message: "not found",
});
}
}
});
app.post("/api/create", async (req, res) => {
const data = req.body;
const valor = _Validator;
const v = new valor();
const schema = {
type: "object",
properties: {
original_link: {
type: "string",
},
id: {
type: "string",
},
stats: {
type: "object",
properties: {
clicks: {
type: "number",
},
created_at: {
type: "string",
},
},
},
},
required: ["original_link"],
};
const resid = !data.id ? Math.random().toString(36).substr(2, 7) : data.id;
const result = v.validate(
{
original_link: data.original_link,
id: resid,
created_at: new Date().toJSON(),
stats: {
clicks: 0,
},
},
schema
);
const ifslash = /\/\w+/;
if (
result.errors.length > 0 ||
isValidURL(data.original_link) === false ||
notallowed.includes(resid) ||
ifslash.test(data.id)
) {
res.status(400).json({
status: 400,
message: "bad request",
});
} else {
await db.put(
{
original_link: data.original_link,
id: resid,
created_at: new Date().toJSON(),
stats: {
clicks: 0,
},
},
resid
);
res.status(200).json({
status: 200,
short_link: `${req.protocol}://${req.get("host")}/${resid}`,
});
}
});
app.get("/link", (req, res) => {
res.redirect(req.query.link);
});
const port = parseInt(process.env.PORT) || 3000;
app.listen(port, () => {
console.log("server started http://localhost:" + port);
});