Export transactions as CSV

frontend/apps/web/src/pages/transactions/TransactionList/TransactionList.tsx

@@ -4,6 +4,7 @@
     selectCurrentUserPermissions,
     selectGroupById,
     selectSortedTransactions,
+    selectAccountIdToAccountMap,
 } from "@abrechnung/redux";
 import { Add, Clear } from "@mui/icons-material";
 import SearchIcon from "@mui/icons-material/Search";
@@ -29,13 +30,14 @@
     useMediaQuery,
 } from "@mui/material";
 import { useTheme } from "@mui/material/styles";
+import { SaveAlt } from "@mui/icons-material";
 import React, { useState } from "react";
 import { useNavigate } from "react-router-dom";
 import { TagSelector } from "@/components/TagSelector";
 import { PurchaseIcon, TransferIcon } from "@/components/style/AbrechnungIcons";
 import { MobilePaper } from "@/components/style/mobile";
 import { useTitle } from "@/core/utils";
-import { selectGroupSlice, useAppDispatch, useAppSelector } from "@/store";
+import { selectGroupSlice, useAppDispatch, useAppSelector, selectAccountSlice } from "@/store";
 import { TransactionListItem } from "./TransactionListItem";
 import { useTranslation } from "react-i18next";
 
@@ -46,6 +48,79 @@
 const emptyList = [];
 const MAX_ITEMS_PER_PAGE = 40;
 
+function exportCsv(groupId) {
+    const accounts = useAppSelector((state) =>
+        selectAccountIdToAccountMap({ state: selectAccountSlice(state), groupId })
+    );
+
+    let transactionsSorted = useAppSelector((state) =>
+        selectSortedTransactions({ state, groupId, searchTerm: "", sortMode: "billed_at", tags: [] })
+    );
+    transactionsSorted = [...transactionsSorted].reverse();
+
+    const accountIds = Object.keys(accounts).filter(id => !accounts[id].deleted);
+    const accountNames = accountIds.map(id => accounts[id].name);
+    const accountIndexById = Object.fromEntries(accountIds.map((id, index) => [id, index]));
+
+    let exportedCsv = "ID,Date,Payer,Name,Tags,Value," + accountNames.join(",") + ",Description\n";
+    for (const transaction of transactionsSorted) {
+        if (transaction.is_wip) continue;
+
+        const creditorId = Object.entries(transaction.creditor_shares)[0][0];
+        const creditorName = accounts[creditorId].name;
+        let tags = "";
+        if (transaction.tags.length == 1) {
+            tags = transaction.tags[0];
+        } else if (transaction.tags.length > 1) {
+            tags = JSON.stringify(transaction.tags.join(","));
+        }
+
+        let value = transaction.value;
+        let total = accountIds.map(() => 0);
+
+        if (transaction.type == "transfer") {
+            total[accountIndexById[creditorId]] = transaction.value;
+            const debitorId = Object.entries(transaction.debitor_shares)[0][0];
+            total[accountIndexById[debitorId]] = -transaction.value;
+            value = 0
+        } else {
+            let extraFromPositions = 0;
+            let totalPositions = 0;
+            for (let position of Object.values(transaction.positions)) {
+                const totalShares = Object.values(position.usages).reduce((a, b) => a + b, 0) + position.communist_shares;
+                for (let [accountId, shares] of Object.entries(position.usages)) {
+                    let value = position.price*shares/totalShares;
+                    total[accountIndexById[accountId]] += value;
+                    totalPositions += value;
+                }
+                extraFromPositions += position.price*position.communist_shares/totalShares;
+            }
+            totalPositions += extraFromPositions;
+            const valueMinusPositions = transaction.value - totalPositions;
+            const totalShares = Object.values(transaction.debitor_shares).reduce((a, b) => a + b, 0);
+            const numberOfDebitors = Object.values(transaction.debitor_shares).length;
+            for (let [accountId, debitorShares] of Object.entries(transaction.debitor_shares)) {
+                total[accountIndexById[accountId]] += valueMinusPositions*debitorShares/totalShares + extraFromPositions/numberOfDebitors;
+            }
+        }
+        exportedCsv += `${transaction.id},${transaction.billed_at},${creditorName},${JSON.stringify(transaction.name)},${tags},${value.toFixed(2)},`;
+        exportedCsv += total.map((value) => value.toFixed(2)).join(",");
+        exportedCsv += "," + JSON.stringify(transaction.description) + "\n";
+    }
+    return exportedCsv;
+}
+
+function downloadCsv(str, filename) {
+    let blob = new Blob([str], {type: "text/csv;charset=utf-8"});
+    let url = URL.createObjectURL(blob);
+    let link = document.createElement("a");
+    link.download = filename;
+    link.href = url;
+    document.body.appendChild(link);
+    link.click();
+    document.body.removeChild(link);
+}
+
 export const TransactionList: React.FC<Props> = ({ groupId }) => {
     const { t } = useTranslation();
     const theme: Theme = useTheme();
@@ -98,6 +173,8 @@
 
     const handleChangeTagFilter = (newTags: string[]) => setTagFilter(newTags);
 
+    const exportedCsv = exportCsv(groupId);
+
     return (
         <>
             <MobilePaper>
@@ -162,6 +239,13 @@
                                 />
                             </FormControl>
                         </Box>
+                        <Box sx={{ display: "flex-item" }}>
+                            <div style={{ padding: "8px" }}>
+                                <Tooltip title="Export CSV">
+                                    <IconButton size="small" color="primary" onClick={() => {downloadCsv(exportedCsv, "transactions.csv");}}><SaveAlt /></IconButton>
+                                </Tooltip>
+                            </div>
+                        </Box>
                         {!isSmallScreen && permissions.canWrite && (
                             <Box sx={{ display: "flex-item" }}>
                                 <div style={{ padding: "8px" }}>