From e281b3dbec7e6eb658b898c82bf995b3c9a3cb5e Mon Sep 17 00:00:00 2001
From: Divlo <contact@divlo.fr>
Date: Thu, 19 Mar 2020 19:49:43 +0100
Subject: [PATCH] backend: ajout de convertCurrency

---
 backend/assets/functions/functionObject.js    |  4 ++-
 .../assets/functions/main/convertCurrency.js  | 31 +++++++++++++++++++
 2 files changed, 34 insertions(+), 1 deletion(-)
 create mode 100644 backend/assets/functions/main/convertCurrency.js

diff --git a/backend/assets/functions/functionObject.js b/backend/assets/functions/functionObject.js
index 1d1f85f..d14d987 100644
--- a/backend/assets/functions/functionObject.js
+++ b/backend/assets/functions/functionObject.js
@@ -4,6 +4,7 @@ const { convertDistanceOutput }                                  = require('./ma
 const { convertTemperatureOutput }                               = require('./main/convertTemperature');
 const { armstrongNumberOutput }                                  = require('./main/armstrongNumber');
 const { weatherRequestOutput }                                   = require('./main/weatherRequest');
+const { convertCurrencyOutput }                                  = require('./main/convertCurrency');
 
 const functionObject = {
     randomNumber        : randomNumberOutput,
@@ -12,7 +13,8 @@ const functionObject = {
     convertDistance     : convertDistanceOutput,
     convertTemperature  : convertTemperatureOutput,
     armstrongNumber     : armstrongNumberOutput,
-    weatherRequest      : weatherRequestOutput
+    weatherRequest      : weatherRequestOutput,
+    convertCurrency     : convertCurrencyOutput
 };
 
 // Choisi la fonction à exécuter
diff --git a/backend/assets/functions/main/convertCurrency.js b/backend/assets/functions/main/convertCurrency.js
new file mode 100644
index 0000000..e0eed74
--- /dev/null
+++ b/backend/assets/functions/main/convertCurrency.js
@@ -0,0 +1,31 @@
+const axios               = require('axios');
+const sendResponse       = require('../../utils/sendResponse');
+const { requiredFields } = require('../../config/errors');
+
+/* OUTPUTS */
+exports.convertCurrencyOutput = (res, argsObject) => {
+    let { number, baseCurrency, finalCurrency } = argsObject;
+    
+    // S'il n'y a pas les champs obligatoire
+    if (!(number && baseCurrency && finalCurrency)) {
+        return sendResponse(res, requiredFields);
+    }
+    
+    // Si ce n'est pas un nombre
+    number = parseFloat(number);
+    if (isNaN(number)) {
+        return sendResponse(res, { result: "Veuillez rentré un nombre valide.", httpStatus: 400 });
+    }
+
+    axios.get(`https://api.exchangeratesapi.io/latest?base=${baseCurrency}`)
+        .then((response) => {
+            const rate = response.data.rates[finalCurrency];
+            const result = rate * number;
+            const dateObject = new Date(response.data.date);
+            const year = dateObject.getFullYear();
+            const day = ('0'+(dateObject.getDate())).slice(-2);
+            const month = ('0'+(dateObject.getMonth()+1)).slice(-2);
+            return sendResponse(res, { result: { date: `${day}/${month}/${year}`, result } }, true);
+        })
+        .catch(() => sendResponse(res, { result: "La devise n'existe pas.", httpStatus: 404 }));
+}
\ No newline at end of file