back/methods/collection/exchangeRateUpdate.js

@@ -0,0 +1,66 @@
+const axios = require('axios');
+const {DOMParser} = require('xmldom');
+const UserError = require('vn-loopback/util/user-error');
+
+module.exports = Self => {
+    Self.remoteMethod('exchangeRateUpdate', {
+        description: 'Updates the exchange rates from an XML feed',
+        accessType: 'WRITE',
+        accepts: [],
+        http: {
+            path: '/exchangeRateUpdate',
+            verb: 'post'
+        },
+        returns: {
+            arg: 'result',
+            type: 'object',
+            root: true
+        }
+    });
+
+    Self.exchangeRateUpdate = async() => {
+        const response = await axios.get('http://www.ecb.europa.eu/stats/eurofxref/eurofxref-hist-90d.xml');
+        const xmlData = response.data;
+
+        const doc = new DOMParser().parseFromString(xmlData, 'text/xml');
+        const cubes = doc.getElementsByTagName('Cube');
+
+        const models = Self.app.models;
+
+        const maxDateRecord = await models.ReferenceRate.findOne({order: 'dated DESC'});
+        let maxDate = maxDateRecord ? new Date(maxDateRecord.dated) : null;
+
+        for (const cube of cubes) {
+            if (cube.attributes.getNamedItem('time')) {
+                const xmlDate = new Date(cube.getAttribute('time'));
+                if (!maxDate || maxDate < xmlDate) {
+                    for (const rateCube of cube.childNodes) {
+                        if (rateCube.nodeType === Node.ELEMENT_NODE) {
+                            const currencyCode = rateCube.getAttribute('currency');
+                            const rate = rateCube.getAttribute('rate');
+                            if (['USD', 'CNY', 'GBP'].includes(currencyCode)) {
+                                const currency = await models.Currency.findOne({where: {code: currencyCode}});
+                                if (!currency) throw new UserError(`Currency not found for code: ${currencyCode}`);
+
+                                try {
+                                    await models.ReferenceRate.upsertWithWhere(
+                                        {currencyFk: currency.id, dated: xmlDate},
+                                        {
+                                            currencyFk: currency.id,
+                                            dated: xmlDate,
+                                            value: rate
+                                        }
+                                    );
+                                } catch (error) {
+                                    console.error(`Failed to upsert rate for ${currencyCode} on ${xmlDate}: ${error}`);
+                                    // Handle or throw the error accordingly
+                                    throw error;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    };
+};

back/model-config.json

@@ -124,6 +124,9 @@
     "Postcode": {
         "dataSource": "vn"
     },
+    "ReferenceRate": {
+        "dataSource": "vn"
+    },
     "SageWithholding": {
         "dataSource": "vn"
     },

back/models/collection.js

@@ -5,4 +5,5 @@ module.exports = Self => {
     require('../methods/collection/getTickets')(Self);
     require('../methods/collection/assign')(Self);
     require('../methods/collection/getSales')(Self);
+    require('../methods/collection/exchangeRateUpdate')(Self);
 };

back/models/reference-rate.json

@@ -0,0 +1,40 @@
+{
+    "name": "ReferenceRate",
+    "base": "PersistedModel",
+    "idInjection": false,
+    "options": {
+        "mysql": {
+            "table": "referenceRate"
+        }
+    },
+    "properties": {
+        "currencyFk": {
+            "type": "number",
+            "required": true,
+            "id": 1,
+            "mysql": {
+                "dataType": "tinyint",
+                "dataLength": 3,
+                "unsigned": true,
+                "primaryKey": true
+            }
+        },
+        "dated": {
+            "type": "date",
+            "required": true,
+            "id": 2
+        },
+        "value": {
+            "type": "number",
+            "required": true
+        }
+    },
+    "acls": [
+        {
+            "accessType": "READ",
+            "principalType": "ROLE",
+            "principalId": "$everyone",
+            "permission": "ALLOW"
+        }
+    ]
+}

db/dump/fixtures.before.sql

@@ -160,7 +160,8 @@ INSERT INTO `vn`.`currency`(`id`, `code`, `name`, `ratio`)
         (1, 'EUR', 'Euro',          1),
         (2, 'USD', 'Dollar USA',    1.4),
         (3, 'GBP', 'Libra',         1),
-        (4, 'JPY', 'Yen Japones',   1);
+        (4, 'JPY', 'Yen Japones',   1),
+        (5, 'CNY',  'Yuan Chino',   1.2);
 
 INSERT INTO `vn`.`country`(`id`, `country`, `isUeeMember`, `code`, `currencyFk`, `ibanLength`, `continentFk`, `hasDailyInvoice`, `CEE`)
     VALUES

loopback/locale/es.json

@@ -352,5 +352,14 @@
 	"The line could not be marked": "La linea no puede ser marcada",
 	"This password can only be changed by the user themselves": "Esta contraseña solo puede ser modificada por el propio usuario",
 	"They're not your subordinate": "No es tu subordinado/a.",
-	"No results found": "No se han encontrado resultados"
+	"No results found": "No se han encontrado resultados",
+	"ReferenceError: app is not defined": "ReferenceError: app is not defined",
+	"TypeError: Cannot read properties of undefined (reading 'ReferenceRate')": "TypeError: Cannot read properties of undefined (reading 'ReferenceRate')",
+	"Error: ER_BAD_FIELD_ERROR: Unknown column 'date' in 'order clause'": "Error: ER_BAD_FIELD_ERROR: Unknown column 'date' in 'order clause'",
+	"ReferenceError: ReferenceRate is not defined": "ReferenceError: ReferenceRate is not defined",
+	"ValidationError: The `ReferenceRate` instance is not valid. Details: `currencyFk` can't be blank (value: NaN).": "ValidationError: The `ReferenceRate` instance is not valid. Details: `currencyFk` can't be blank (value: NaN).",
+	"ReferenceError: Currency is not defined": "ReferenceError: Currency is not defined",
+	"UserError: Currency not found for code: CNY": "UserError: Currency not found for code: CNY",
+	"Error: ER_DUP_ENTRY: Duplicate entry '2-2024-04-03' for key 'PRIMARY'": "Error: ER_DUP_ENTRY: Duplicate entry '2-2024-04-03' for key 'PRIMARY'",
+	"Error: ER_DUP_ENTRY: Duplicate entry '2-2024-04-08' for key 'PRIMARY'": "Error: ER_DUP_ENTRY: Duplicate entry '2-2024-04-08' for key 'PRIMARY'"
 }