Add traps; user registration

app/routing/middleware/Traps.middleware.js

@@ -0,0 +1,61 @@
+const { Middleware } = require('libflitter')
+
+class TrapUtility {
+    constructor(req, res, configs) {
+        this.request = req
+        this.response = res
+        this.user = req.user
+        this.configs = configs
+    }
+
+    async begin(trap_name) {
+        this.user.trap = trap_name
+        this.request.trust.assume()
+        await this.user.save()
+    }
+
+    redirect() {
+        this.request.trust.assume()
+        return this.response.redirect(this.config().redirect_to)
+    }
+
+    async end() {
+        this.user.trap = ''
+        this.request.trust.unassume()
+        await this.user.save()
+    }
+
+    has_trap() {
+        return !!this.user.trap
+    }
+
+    get_trap() {
+        return this.user.trap
+    }
+
+    config() {
+        return this.configs[this.get_trap()]
+    }
+
+    allows(route) {
+        const config = this.config()
+        return route.startsWith('/assets') || config.allowed_routes.includes(route.toLowerCase().trim())
+    }
+}
+
+class TrapsMiddleware extends Middleware {
+    static get services() {
+        return [...super.services, 'models', 'configs']
+    }
+
+    async test(req, res, next, args = {}) {
+        if ( !req?.user ) return next()
+        req.trap = new TrapUtility(req, res, this.configs.get('traps.types'))
+
+        if ( !req.trap.has_trap() ) return next()
+        else if ( req.trap.allows(req.path) ) return next()
+        else return req.trap.redirect()
+    }
+}
+
+module.exports = exports = TrapsMiddleware