refactor: bans

packages/governor/src/ban.js

@@ -1,6 +1,6 @@
 /* eslint-disable import/no-extraneous-dependencies */
 import {
-  Model, Types,
+  Model, Op, Types,
 } from '@latus/db';
 
 export default (latus) => {
@@ -18,51 +18,57 @@ export default (latus) => {
     }
 
     static async check(req) {
-      const entries = keys.map((key) => [key, req[key]]);
+      const ban = this.fromRequest(req, keys);
-      const promises = entries.map(([key, value]) => this.findOne({where: {[key]: value}}));
+      const candidates = Object.entries(ban)
-      const bans = await Promise.all(promises);
+        .reduce((r, [key, value]) => [...r, {[key]: value}], []);
-      const pruned = bans.reduce((r, ban) => {
+      const where = {
-        if (ban && ban.ttl > 0) {
+        where: {
-          const expiresAt = new Date(ban.createdAt);
+          [Op.or]: candidates,
-          expiresAt.setSeconds(expiresAt.getSeconds() + ban.ttl);
+        },
-          if (Date.now() >= expiresAt.getTime()) {
+      };
-            this.destroy({where: {id: ban.id}});
+      const bans = await this.findAll(where);
-            return [...r, null];
+      const pruned = bans
+        .reduce((r, ban) => {
+          if (ban && ban.ttl > 0) {
+            const expiresAt = new Date(ban.createdAt);
+            expiresAt.setSeconds(expiresAt.getSeconds() + ban.ttl);
+            if (Date.now() >= expiresAt.getTime()) {
+              this.destroy({where: {id: ban.id}});
+              return [...r, null];
+            }
+            // eslint-disable-next-line no-param-reassign
+            ban.ttl = Math.ceil((expiresAt.getTime() - Date.now()) / 1000);
           }
-        }
+          return [...r, ban];
-        return [...r, ban];
+        }, [])
-      }, []);
+        .filter((ban) => !!ban)
-      const prunedEntries = pruned
+        .map((ban) => ban.toJSON());
-        .reduce((r, ban, i) => ([
+      if (0 === pruned.length) {
-          ...r,
-          ...(
-            ban
-              ? [[
-                entries[i][0],
-                [ban.ttl, entries[i][1]],
-              ]]
-              : []),
-        ]), []);
-      if (0 === prunedEntries.length) {
         return;
       }
-      throw new Error(this.format(prunedEntries));
+      throw new Error(this.format(pruned));
-    }
-
-    static async create(req, keys, ttl) {
-      return Promise.all(keys.map((key) => super.create({[key]: req[key], ttl})));
     }
 
     static format(bans) {
       return [
-        'ban = {',
+        'bans = [',
-        bans.map(
+        bans.map((ban) => {
-          ([key, [ttl, value]]) => `  ${key}: ${value},${ttl ? ` // ttl: ${ttl}` : ''}`,
+          const entries = Object.entries(ban)
-        ).join('\n'),
+            .filter(([key]) => -1 === ['id', 'createdAt', 'updatedAt'].indexOf(key));
-        '};',
+          return [
+            '  {',
+            entries.map(([key, value]) => `    ${key}: ${value},`).join('\n'),
+            '  },',
+          ].join('\n');
+        }).join('\n'),
+        '];',
       ].join('\n');
     }
 
+    static fromRequest(req, keys, ttl = 0) {
+      return keys.reduce((r, key) => ({...r, [key]: req[key]}), ttl ? {ttl} : {});
+    }
+
   };
 
 };

packages/governor/src/index.js

@@ -6,10 +6,6 @@ import createLimiter from './limiter';
 
 export {createLimiter};
 
-const {
-  NODE_ENV,
-} = process.env;
-
 export default {
   hooks: {
     '@latus/core/config': () => ({
@@ -46,8 +42,9 @@ export default {
           return;
         }
         req.ban = async (keys, ttl = 0) => {
-          await Ban.create(req, keys, ttl);
+          const ban = Ban.fromRequest(req, keys, ttl);
-          res.status(403).send(`<pre>${Ban.format(keys.map((key) => [key, [ttl, req[key]]]))}</pre>`);
+          await Ban.create({...ban});
+          res.status(403).send(`<pre>${Ban.format([ban])}</pre>`);
         };
         try {
           await limiter.consume(req.ip);
@@ -55,8 +52,9 @@ export default {
         }
         catch (error) {
           const {ttl, keys} = http;
-          await Ban.create(req, keys, ttl);
+          const ban = Ban.fromRequest(req, keys, ttl);
-          res.status(429).send(`<pre>${Ban.format(keys.map((key) => [key, [ttl, req[key]]]))}</pre>`);
+          await Ban.create({...ban});
+          res.status(429).send(`<pre>${Ban.format([ban])}</pre>`);
         }
       };
     },
@@ -77,7 +75,7 @@ export default {
           return;
         }
         req.ban = async (keys, ttl) => {
-          await Ban.create(req, keys, ttl);
+          await Ban.create(Ban.fromRequest(req, keys, ttl));
           socket.disconnect();
         };
         try {
@@ -86,7 +84,7 @@ export default {
         }
         catch (error) {
           const {ttl, keys} = socket;
-          await Ban.create(req, keys, ttl);
+          await Ban.create(Ban.fromRequest(req, keys, ttl));
           next(error);
         }
       };