From 1ed03f3710bbbd2c7b5783b6d97a8f6fc9027eeb Mon Sep 17 00:00:00 2001
From: MaysWind <i@mayswind.net>
Date: Wed, 18 Nov 2020 02:03:46 +0800
Subject: [PATCH] support plus account balance which account currency does not
 equal to default currency

---
 src/lib/exchangeRates.js                  | 33 +++++++++++
 src/views/mobile/accounts/AccountList.vue | 68 +++++++++++++++++++----
 2 files changed, 89 insertions(+), 12 deletions(-)

diff --git a/src/lib/exchangeRates.js b/src/lib/exchangeRates.js
index a32e6e80..05afc6ea 100644
--- a/src/lib/exchangeRates.js
+++ b/src/lib/exchangeRates.js
@@ -1,3 +1,5 @@
+import utils from './utils.js'
+
 const exchangeRatesLocalStorageKey = 'lab_exchange_rates';
 
 function getExchangeRates() {
@@ -14,8 +16,39 @@ function clearExchangeRates() {
     localStorage.removeItem(exchangeRatesLocalStorageKey);
 }
 
+function getExchangeRate(fromCurrency, toCurrency) {
+    const exchangeRates = getExchangeRates().exchangeRates;
+    const exchangeRateMap = {};
+
+    for (let i = 0; i < exchangeRates.length; i++) {
+        const exchangeRate = exchangeRates[i];
+        exchangeRateMap[exchangeRate.currency] = exchangeRate;
+    }
+
+    const fromCurrencyExchangeRate = exchangeRateMap[fromCurrency];
+    const toCurrencyExchangeRate = exchangeRateMap[toCurrency];
+
+    if (!fromCurrencyExchangeRate || !toCurrencyExchangeRate) {
+        return null;
+    }
+
+    return parseFloat(toCurrencyExchangeRate.rate) / parseFloat(fromCurrencyExchangeRate.rate);
+}
+
+function getOtherCurrencyAmount(amount, fromCurrency, toCurrency) {
+    const exchangeRate = getExchangeRate(fromCurrency, toCurrency);
+
+    if (!utils.isNumber(exchangeRate)) {
+        return null;
+    }
+
+    return amount * exchangeRate;
+}
+
 export default {
     getExchangeRates,
     setExchangeRates,
     clearExchangeRates,
+    getExchangeRate,
+    getOtherCurrencyAmount,
 };
diff --git a/src/views/mobile/accounts/AccountList.vue b/src/views/mobile/accounts/AccountList.vue
index 9a3cb315..bfdad2bf 100644
--- a/src/views/mobile/accounts/AccountList.vue
+++ b/src/views/mobile/accounts/AccountList.vue
@@ -188,17 +188,28 @@ export default {
 
             const accountsBalance = this.$utilities.getAllFilteredAccountsBalance(this.accounts, () => true);
             let netAssets = 0;
+            let hasUnCalculatedAmount = false;
 
             for (let i = 0; i < accountsBalance.length; i++) {
                 if (accountsBalance[i].currency === this.defaultCurrency) {
                     netAssets += accountsBalance[i].balance;
                 } else {
-                    // TODO: calculate exchange rate
-                    netAssets += accountsBalance[i].balance;
+                    const balance = this.$exchangeRates.getOtherCurrencyAmount(accountsBalance[i].balance, accountsBalance[i].currency, this.defaultCurrency);
+
+                    if (!this.$utilities.isNumber(balance)) {
+                        hasUnCalculatedAmount = true;
+                        continue;
+                    }
+
+                    netAssets += Math.floor(balance);
                 }
             }
 
-            return netAssets;
+            if (hasUnCalculatedAmount) {
+                return netAssets + '+';
+            } else {
+                return netAssets;
+            }
         },
         totalAssets() {
             if (!this.showAccountBalance) {
@@ -207,17 +218,28 @@ export default {
 
             const accountsBalance = this.$utilities.getAllFilteredAccountsBalance(this.accounts, category => category.isAsset);
             let totalAssets = 0;
+            let hasUnCalculatedAmount = false;
 
             for (let i = 0; i < accountsBalance.length; i++) {
                 if (accountsBalance[i].currency === this.defaultCurrency) {
                     totalAssets += accountsBalance[i].balance;
                 } else {
-                    // TODO: calculate exchange rate
-                    totalAssets += accountsBalance[i].balance;
+                    const balance = this.$exchangeRates.getOtherCurrencyAmount(accountsBalance[i].balance, accountsBalance[i].currency, this.defaultCurrency);
+
+                    if (!this.$utilities.isNumber(balance)) {
+                        hasUnCalculatedAmount = true;
+                        continue;
+                    }
+
+                    totalAssets += Math.floor(balance);
                 }
             }
 
-            return totalAssets;
+            if (hasUnCalculatedAmount) {
+                return totalAssets + '+';
+            } else {
+                return totalAssets;
+            }
         },
         totalLiabilities() {
             if (!this.showAccountBalance) {
@@ -226,17 +248,28 @@ export default {
 
             const accountsBalance = this.$utilities.getAllFilteredAccountsBalance(this.accounts, category => category.isLiability);
             let totalLiabilities = 0;
+            let hasUnCalculatedAmount = false;
 
             for (let i = 0; i < accountsBalance.length; i++) {
                 if (accountsBalance[i].currency === this.defaultCurrency) {
                     totalLiabilities += accountsBalance[i].balance;
                 } else {
-                    // TODO: calculate exchange rate
-                    totalLiabilities += accountsBalance[i].balance;
+                    const balance = this.$exchangeRates.getOtherCurrencyAmount(accountsBalance[i].balance, accountsBalance[i].currency, this.defaultCurrency);
+
+                    if (!this.$utilities.isNumber(balance)) {
+                        hasUnCalculatedAmount = true;
+                        continue;
+                    }
+
+                    totalLiabilities += Math.floor(balance);
                 }
             }
 
-            return totalLiabilities;
+            if (hasUnCalculatedAmount) {
+                return totalLiabilities + '+';
+            } else {
+                return totalLiabilities;
+            }
         }
     },
     created() {
@@ -333,17 +366,28 @@ export default {
 
             const accountsBalance = this.$utilities.getAllFilteredAccountsBalance(this.accounts, category => category.id === accountCategory.id);
             let totalBalance = 0;
+            let hasUnCalculatedAmount = false;
 
             for (let i = 0; i < accountsBalance.length; i++) {
                 if (accountsBalance[i].currency === this.defaultCurrency) {
                     totalBalance += accountsBalance[i].balance;
                 } else {
-                    // TODO: calculate exchange rate
-                    totalBalance += accountsBalance[i].balance;
+                    const balance = this.$exchangeRates.getOtherCurrencyAmount(accountsBalance[i].balance, accountsBalance[i].currency, this.defaultCurrency);
+
+                    if (!this.$utilities.isNumber(balance)) {
+                        hasUnCalculatedAmount = true;
+                        continue;
+                    }
+
+                    totalBalance += Math.floor(balance);
                 }
             }
 
-            return totalBalance;
+            if (hasUnCalculatedAmount) {
+                return totalBalance + '+';
+            } else {
+                return totalBalance;
+            }
         },
         setSortable() {
             this.showHidden = true;