From 13a1bd9ab0e94c484e1792631410f894609455d9 Mon Sep 17 00:00:00 2001
From: Anatoly <akopyl@radner.ru>
Date: Mon, 7 Mar 2022 01:36:25 +0300
Subject: [PATCH] Added a rate limiter

---
 api.js            | 13 ++++++++++---
 package-lock.json | 29 ++++++++++++++++++++++++++++-
 package.json      |  3 ++-
 3 files changed, 40 insertions(+), 5 deletions(-)

diff --git a/api.js b/api.js
index 0d3eeed..4eaa207 100644
--- a/api.js
+++ b/api.js
@@ -1,13 +1,20 @@
-const { default: axios } = require('axios')
+const axios = require('axios')
+const { RateLimiter } = require('limiter')
 
 class Api {
   constructor () {
     this.baseUrl = 'https://api.warframe.market/v1/'
-    this.timeout = 0
+    this.delay = process.env.API_DELAY ?? 3000
+    this.limiter = new RateLimiter({ tokensPerInterval: 1, interval: Number(this.delay) })
+  }
+
+  async _get (url) {
+    await this.limiter.removeTokens(1)
+    return axios.get(url)
   }
 
   async getOrders (url) {
-    const response = await axios.get(this.baseUrl + 'items/' + url + '/orders')
+    const response = await this._get(this.baseUrl + 'items/' + url + '/orders')
     return response.data.payload.orders.filter(function (order) {
       return order.order_type === 'sell' && order.user.status !== 'offline'
     })
diff --git a/package-lock.json b/package-lock.json
index f7134d8..eb907a3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,8 @@
       "dependencies": {
         "axios": "^0.26.0",
         "dotenv": "^16.0.0",
-        "handlebars": "^4.7.7"
+        "handlebars": "^4.7.7",
+        "limiter": "^2.1.0"
       },
       "devDependencies": {
         "eslint-config-standard": "^16.0.3"
@@ -1646,6 +1647,11 @@
         "json5": "lib/cli.js"
       }
     },
+    "node_modules/just-performance": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/just-performance/-/just-performance-4.3.0.tgz",
+      "integrity": "sha512-L7RjvtJsL0QO8xFs5wEoDDzzJwoiowRw6Rn/GnvldlchS2JQr9wFYPiwZcDfrbbujEKqKN0tvENdbjXdYhDp5Q=="
+    },
     "node_modules/levn": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/levn/-/levn-0.4.1.tgz",
@@ -1660,6 +1666,14 @@
         "node": ">= 0.8.0"
       }
     },
+    "node_modules/limiter": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/limiter/-/limiter-2.1.0.tgz",
+      "integrity": "sha512-361TYz6iay6n+9KvUUImqdLuFigK+K79qrUtBsXhJTLdH4rIt/r1y8r1iozwh8KbZNpujbFTSh74mJ7bwbAMOw==",
+      "dependencies": {
+        "just-performance": "4.3.0"
+      }
+    },
     "node_modules/lodash.merge": {
       "version": "4.6.2",
       "resolved": "https://registry.npmjs.org/lodash.merge/-/lodash.merge-4.6.2.tgz",
@@ -3567,6 +3581,11 @@
         "minimist": "^1.2.0"
       }
     },
+    "just-performance": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/just-performance/-/just-performance-4.3.0.tgz",
+      "integrity": "sha512-L7RjvtJsL0QO8xFs5wEoDDzzJwoiowRw6Rn/GnvldlchS2JQr9wFYPiwZcDfrbbujEKqKN0tvENdbjXdYhDp5Q=="
+    },
     "levn": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/levn/-/levn-0.4.1.tgz",
@@ -3578,6 +3597,14 @@
         "type-check": "~0.4.0"
       }
     },
+    "limiter": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/limiter/-/limiter-2.1.0.tgz",
+      "integrity": "sha512-361TYz6iay6n+9KvUUImqdLuFigK+K79qrUtBsXhJTLdH4rIt/r1y8r1iozwh8KbZNpujbFTSh74mJ7bwbAMOw==",
+      "requires": {
+        "just-performance": "4.3.0"
+      }
+    },
     "lodash.merge": {
       "version": "4.6.2",
       "resolved": "https://registry.npmjs.org/lodash.merge/-/lodash.merge-4.6.2.tgz",
diff --git a/package.json b/package.json
index 134ef6a..323379f 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,8 @@
   "dependencies": {
     "axios": "^0.26.0",
     "dotenv": "^16.0.0",
-    "handlebars": "^4.7.7"
+    "handlebars": "^4.7.7",
+    "limiter": "^2.1.0"
   },
   "devDependencies": {
     "eslint-config-standard": "^16.0.3"