Added category spend and more dynamic charts.

finnow-api/source/analytics/api.d

@@ -9,6 +9,11 @@ void handleGetBalanceTimeSeries(ref ServerHttpRequest request, ref ServerHttpRes
     serveJsonFromProperty(response, ds, "analytics.balanceTimeSeries");
 }
 
+void handleGetCategorySpendTimeSeries(ref ServerHttpRequest request, ref ServerHttpResponse response) {
+    auto ds = getProfileDataSource(request);
+    serveJsonFromProperty(response, ds, "analytics.categorySpendTimeSeries");
+}
+
 /**
  * Helper method to serve JSON analytics data to a client by fetching it
  * directly from the user's profile properties table and writing it to the

finnow-api/source/analytics/balances.d

@@ -1,6 +1,6 @@
 module analytics.balances;
 
-import handy_http_primitives;
+import handy_http_primitives : Optional, mapIfPresent;
 import std.datetime;
 import std.stdio;
 import std.path;
@@ -14,26 +14,28 @@ import account.data;
 import account.model;
 import account.service;
 import analytics.util;
+import transaction.model;
+import transaction.dto;
+import util.pagination;
 
-struct BalanceSnapshot {
-    long balance;
-    string timestamp;
+struct TimeSeriesPoint {
+    /// The millisecond UTC timestamp.
+    ulong x;
+    /// The value at this timestamp.
+    long y;
 }
 
-struct AccountBalanceTimeSeries {
+alias CurrencyGroupedTimeSeries = TimeSeriesPoint[][string];
+
+struct AccountBalanceData {
     ulong accountId;
     string currencyCode;
-    BalanceSnapshot[] balanceTimeSeries;
-}
-
-struct TotalBalanceTimeSeries {
-    string currencyCode;
-    BalanceSnapshot[] balanceTimeSeries;
+    TimeSeriesPoint[] data;
 }
 
 struct BalanceTimeSeriesAnalytics {
-    AccountBalanceTimeSeries[] accounts;
-    TotalBalanceTimeSeries[] totals;
+    AccountBalanceData[] accounts;
+    CurrencyGroupedTimeSeries totals;
 }
 
 void computeAccountBalanceTimeSeries(Profile profile, ProfileRepository profileRepo) {
@@ -43,11 +45,10 @@ void computeAccountBalanceTimeSeries(Profile profile, ProfileRepository profileR
     // Initialize the data structure that'll store the analytics info.
     BalanceTimeSeriesAnalytics data;
     foreach (account; accounts) {
-        data.accounts ~= AccountBalanceTimeSeries(
-            account.id,
-            account.currency.code.idup,
-            []
-        );
+        AccountBalanceData accountData;
+        accountData.accountId = account.id;
+        accountData.currencyCode = account.currency.code.idup;
+        data.accounts ~= accountData;
     }
 
     foreach (timestamp; generateTimeSeriesTimestamps(days(1), 365)) {
@@ -55,39 +56,22 @@ void computeAccountBalanceTimeSeries(Profile profile, ProfileRepository profileR
         foreach (idx, account; accounts) {
             auto balance = getBalance(ds, account.id, timestamp);
             if (!balance.isNull) {
-                data.accounts[idx].balanceTimeSeries ~= BalanceSnapshot(
-                    balance.value,
-                    timestamp.toISOExtString()
+                data.accounts[idx].data ~= TimeSeriesPoint(
+                    timestamp.toUnixMillis(),
+                    balance.value
                 );
             }
         }
 
         // Compute total balances for this timestamp.
         auto totalBalances = getTotalBalanceForAllAccounts(ds, timestamp);
-        foreach (bal; totalBalances) {
-            // Assign the balance to one of our running totals.
-            bool currencyFound = false;
-            foreach (ref currencyTotal; data.totals) {
-                if (currencyTotal.currencyCode == bal.currency.code) {
-                    currencyTotal.balanceTimeSeries ~= BalanceSnapshot(
-                        bal.balance,
-                        timestamp.toISOExtString()
-                    );
-                    currencyFound = true;
-                    break;
-                }
-            }
-            if (!currencyFound) {
-                data.totals ~= TotalBalanceTimeSeries(
-                    bal.currency.code.idup,
-                    [BalanceSnapshot(bal.balance, timestamp.toISOExtString())]
-                );
-            }
+        foreach (CurrencyBalance bal; totalBalances) {
+            data.totals[bal.currency.code.idup] ~= TimeSeriesPoint(timestamp.toUnixMillis(), bal.balance);
         }
     }
 
     ds.doTransaction(() {
-        ds.getPropertiesRepository().deleteAllByPrefix("analytics");
+        ds.getPropertiesRepository().deleteProperty("analytics.balanceTimeSeries");
         ds.getPropertiesRepository().setProperty(
             "analytics.balanceTimeSeries",
             serializeToJsonPretty(data)
@@ -97,4 +81,73 @@ void computeAccountBalanceTimeSeries(Profile profile, ProfileRepository profileR
         profile.username,
         profile.name
     );
-}
+}
+
+struct CategorySpendData {
+    ulong categoryId;
+    string categoryName;
+    string categoryColor;
+    CurrencyGroupedTimeSeries dataByCurrency;
+}
+
+struct CategorySpendTimeSeriesAnalytics {
+    CategorySpendData[] categories;
+}
+
+void computeCategorySpendTimeSeries(Profile profile, ProfileRepository profileRepo) {
+    ProfileDataSource ds = profileRepo.getDataSource(profile);
+    TransactionCategory[] rootCategories = ds.getTransactionCategoryRepository()
+        .findAllByParentId(Optional!ulong.empty);
+
+    CategorySpendTimeSeriesAnalytics data;
+    
+    PageRequest pr = PageRequest(1, 100, [Sort("txn.timestamp", SortDir.ASC)]);
+    Page!TransactionsListItem page = ds.getTransactionRepository().findAll(pr);
+    while (page.items.length > 0) {
+        foreach (TransactionsListItem txn; page.items) {
+            if (!isTypicalSpendingTransaction(txn)) continue;
+
+            ulong categoryId = txn.category.mapIfPresent!(c => c.id).orElse(0);
+            TimeSeriesPoint dataPoint = TimeSeriesPoint(
+                SysTime.fromISOExtString(txn.timestamp).toUnixMillis(),
+                txn.amount
+            );
+
+            bool foundCategory = false;
+            foreach (ref cd; data.categories) {
+                if (cd.categoryId == categoryId) {
+                    cd.dataByCurrency[txn.currency.code.idup] ~= dataPoint;
+                    foundCategory = true;
+                    break;
+                }
+            }
+            if (!foundCategory) {
+                CategorySpendData cd;
+                cd.categoryId = categoryId;
+                cd.categoryName = txn.category.mapIfPresent!(c => c.name).orElse("None");
+                cd.categoryColor = txn.category.mapIfPresent!(c => c.color).orElse("FFFFFF");
+                cd.dataByCurrency[txn.currency.code.idup] ~= dataPoint;
+                data.categories ~= cd;
+            }
+        }
+        page = ds.getTransactionRepository().findAll(page.pageRequest.next());
+    }
+
+    ds.doTransaction(() {
+        ds.getPropertiesRepository().deleteProperty("analytics.categorySpendTimeSeries");
+        ds.getPropertiesRepository().setProperty(
+            "analytics.categorySpendTimeSeries",
+            serializeToJsonPretty(data)
+        );
+    });
+    infoF!"Computed category spend analytics for user %s, profile %s."(
+        profile.username,
+        profile.name
+    );
+}
+
+private bool isTypicalSpendingTransaction(in TransactionsListItem txn) {
+    return !txn.creditedAccount.isNull &&
+        txn.debitedAccount.isNull &&
+        !txn.internalTransfer;
+}

finnow-api/source/analytics/util.d

@@ -16,4 +16,8 @@ SysTime[] generateTimeSeriesTimestamps(Duration intervalSize, int intervalCount)
         timestamps[i + 1] = timestamp;
     }
     return timestamps;
-}
+}
+
+ulong toUnixMillis(in SysTime ts) {
+    return (ts - SysTime(unixTimeToStdTime(0))).total!"msecs";
+}

finnow-api/source/api_mapping.d

@@ -95,6 +95,7 @@ HttpRequestHandler mapApiHandlers(string webOrigin) {
 	// Analytics endpoints:
 	import analytics.api;
 	a.map(HttpMethod.GET, PROFILE_PATH ~ "/analytics/balance-time-series", &handleGetBalanceTimeSeries);
+	a.map(HttpMethod.GET, PROFILE_PATH ~ "/analytics/category-spend-time-series", &handleGetCategorySpendTimeSeries);
 
 	import data_api;
 	// Various other data endpoints:

finnow-api/source/app.d

@@ -25,6 +25,7 @@ void main() {
 	jobScheduler.addJob(() {
 		info("Computing account balance time series analytics for all users...");
 		doForAllUserProfiles(&computeAccountBalanceTimeSeries);
+		doForAllUserProfiles(&computeCategorySpendTimeSeries);
 		info("Done computing analytics!");
 	}, analyticsSchedule);
 	jobScheduler.start();

finnow-api/source/util/pagination.d

@@ -40,17 +40,17 @@ struct PageRequest {
      * The requested page number, starting from 1 for the first page, or zero
      * for an unpaged request.
      */
-    immutable uint page;
+    uint page;
 
     /**
      * The maximum number of items to include in each page of results.
      */
-    immutable ushort size;
+    ushort size;
 
     /**
      * A list of sorts to apply.
      */
-    immutable Sort[] sorts;
+    Sort[] sorts;
 
     bool isUnpaged() const {
         return page < 1;
@@ -60,7 +60,7 @@ struct PageRequest {
         return PageRequest(0, 0, []);
     }
 
-    static PageRequest parse(in ServerHttpRequest request, PageRequest defaults) {
+    static PageRequest parse(in ServerHttpRequest request, in PageRequest defaults) {
         import std.algorithm;
         import std.array;
         uint pg = request.getParamAs!uint("page", defaults.page);
@@ -74,7 +74,7 @@ struct PageRequest {
         if (s.length == 0 && defaults.sorts.length > 0) {
             s = defaults.sorts.dup;
         }
-        return PageRequest(pg, sz, s.idup);
+        return PageRequest(pg, sz, s.dup);
     }
 
     string toSql() const {
@@ -107,13 +107,13 @@ struct PageRequest {
     }
 
     PageRequest next() const {
-        if (isUnpaged) return this;
-        return PageRequest(page + 1, size, sorts);
+        if (isUnpaged) return PageRequest(page, size, sorts.dup);
+        return PageRequest(page + 1, size, sorts.dup);
     }
 
     PageRequest prev() const {
-        if (isUnpaged) return this;
-        return PageRequest(page - 1, size, sorts);
+        if (isUnpaged) return PageRequest(page, size, sorts.dup);
+        return PageRequest(page - 1, size, sorts.dup);
     }
 }
 
@@ -137,11 +137,11 @@ struct Page(T) {
         return Page!(U)(items.map!(fn).array, pageRequest, totalElements, totalPages, isFirst, isLast);
     } 
 
-    static Page of(T[] items, PageRequest pageRequest, ulong totalCount) {
+    static Page of(T[] items, in PageRequest pageRequest, ulong totalCount) {
         ulong pageCount = getTotalPageCount(totalCount, pageRequest.size);
         return Page(
             items,
-            pageRequest,
+            PageRequest(pageRequest.page, pageRequest.size, pageRequest.sorts.dup),
             totalCount,
             pageCount,
             pageRequest.page == 1,

web-app/src/api/analytics.ts

@@ -2,25 +2,33 @@ import type { RouteLocation } from 'vue-router'
 import { ApiClient } from './base'
 import { getSelectedProfile } from './profile'
 
-export interface BalanceTimeSeriesAnalytics {
-  accounts: AccountBalanceTimeSeries[]
-  totals: TotalBalanceTimeSeries[]
+export interface TimeSeriesPoint {
+  x: number
+  y: number
 }
 
-export interface AccountBalanceTimeSeries {
+export type CurrencyGroupedTimeSeries = Record<string, TimeSeriesPoint[]>
+
+export interface AccountBalanceData {
   accountId: number
   currencyCode: string
-  balanceTimeSeries: BalanceSnapshot[]
+  data: TimeSeriesPoint[]
 }
 
-export interface TotalBalanceTimeSeries {
-  currencyCode: string
-  balanceTimeSeries: BalanceSnapshot[]
+export interface BalanceTimeSeriesAnalytics {
+  accounts: AccountBalanceData[]
+  totals: CurrencyGroupedTimeSeries
 }
 
-export interface BalanceSnapshot {
-  balance: number
-  timestamp: string
+export interface CategorySpendData {
+  categoryId: number
+  categoryName: string
+  categoryColor: string
+  dataByCurrency: CurrencyGroupedTimeSeries
+}
+
+export interface CategorySpendTimeSeriesAnalytics {
+  categories: CategorySpendData[]
 }
 
 export class AnalyticsApiClient extends ApiClient {
@@ -36,4 +44,8 @@ export class AnalyticsApiClient extends ApiClient {
   getBalanceTimeSeries(): Promise<BalanceTimeSeriesAnalytics> {
     return super.getJson(this.path + '/balance-time-series')
   }
+
+  getCategorySpendTimeSeries(): Promise<CategorySpendTimeSeriesAnalytics> {
+    return super.getJson(this.path + '/category-spend-time-series')
+  }
 }

web-app/src/pages/home/AnalyticsModule.vue

@@ -4,18 +4,26 @@ import HomeModule from '@/components/HomeModule.vue'
 import { computed, onMounted, ref, type ComputedRef } from 'vue'
 import 'chartjs-adapter-date-fns'
 import type { Currency } from '@/api/data'
-import { AnalyticsApiClient, type BalanceTimeSeriesAnalytics } from '@/api/analytics'
+import {
+  AnalyticsApiClient,
+  type CategorySpendTimeSeriesAnalytics,
+  type BalanceTimeSeriesAnalytics,
+} from '@/api/analytics'
 import BalanceTimeSeriesChart from './analytics/BalanceTimeSeriesChart.vue'
 import type { TimeFrame, BalanceTimeSeries } from './analytics/util'
 import FormGroup from '@/components/common/form/FormGroup.vue'
 import FormControl from '@/components/common/form/FormControl.vue'
 import { isAfter, isBefore, startOfMonth, startOfYear, sub } from 'date-fns'
 import { useRoute } from 'vue-router'
+import CategorySpendPieChart from './analytics/CategorySpendPieChart.vue'
 
 const route = useRoute()
 
 const accounts = ref<Account[]>([])
+
 const balanceTimeSeriesData = ref<BalanceTimeSeriesAnalytics>()
+const categorySpendTimeSeriesData = ref<CategorySpendTimeSeriesAnalytics>()
+
 const currency = ref<Currency>()
 const timeFrame = ref<TimeFrame>({})
 
@@ -26,7 +34,8 @@ interface AnalyticsChartType {
 
 const AnalyticsChartTypes: AnalyticsChartType[] = [
   { id: 'account-balances', name: 'Account Balances' },
-  { id: 'total-balances', name: 'Total Balances' },
+  { id: 'total-balances', name: 'Total Balance' },
+  { id: 'category-spend', name: 'Category Spend' },
 ]
 
 const selectedChart = ref<AnalyticsChartType>(AnalyticsChartTypes[0])
@@ -48,18 +57,18 @@ const accountBalancesData: ComputedRef<BalanceTimeSeries[]> = computed(() => {
   for (const accountData of balanceTimeSeriesData.value.accounts) {
     const account = eligibleAccounts.find((a) => a.id === accountData.accountId)
     if (account !== undefined) {
-      const filteredTimeSeries = accountData.balanceTimeSeries.filter((s) => {
-        if (timeFrame.value.start && !isAfter(s.timestamp, timeFrame.value.start)) {
+      const filteredTimeSeries = accountData.data.filter((s) => {
+        if (timeFrame.value.start && !isAfter(s.x, timeFrame.value.start)) {
           return false
         }
-        if (timeFrame.value.end && !isBefore(s.timestamp, timeFrame.value.end)) {
+        if (timeFrame.value.end && !isBefore(s.x, timeFrame.value.end)) {
           return false
         }
         return true
       })
       series.push({
         label: account.name,
-        snapshots: filteredTimeSeries,
+        data: filteredTimeSeries,
       })
     }
   }
@@ -67,21 +76,20 @@ const accountBalancesData: ComputedRef<BalanceTimeSeries[]> = computed(() => {
 })
 
 const totalBalancesData: ComputedRef<BalanceTimeSeries[]> = computed(() => {
-  if (!balanceTimeSeriesData.value) return []
-  const totalsData = balanceTimeSeriesData.value.totals.find(
-    (t) => t.currencyCode === currency.value?.code,
-  )
-  if (!totalsData) return []
-  const filteredTimeSeries = totalsData.balanceTimeSeries.filter((s) => {
-    if (timeFrame.value.start && !isAfter(s.timestamp, timeFrame.value.start)) {
+  if (!balanceTimeSeriesData.value || !currency.value) return []
+  const currencyCode = currency.value.code
+  if (!(currencyCode in balanceTimeSeriesData.value.totals)) return []
+  const totalsData = balanceTimeSeriesData.value.totals[currencyCode]
+  const filteredTimeSeries = totalsData.filter((s) => {
+    if (timeFrame.value.start && !isAfter(s.x, timeFrame.value.start)) {
       return false
     }
-    if (timeFrame.value.end && !isBefore(s.timestamp, timeFrame.value.end)) {
+    if (timeFrame.value.end && !isBefore(s.x, timeFrame.value.end)) {
       return false
     }
     return true
   })
-  return [{ label: totalsData.currencyCode, snapshots: filteredTimeSeries }]
+  return [{ label: currencyCode, data: filteredTimeSeries }]
 })
 
 onMounted(async () => {
@@ -89,6 +97,7 @@ onMounted(async () => {
   const analyticsApi = new AnalyticsApiClient(route)
   accounts.value = await api.getAccounts()
   balanceTimeSeriesData.value = await analyticsApi.getBalanceTimeSeries()
+  categorySpendTimeSeriesData.value = await analyticsApi.getCategorySpendTimeSeries()
   if (accounts.value.length > 0) {
     currency.value = accounts.value[0].currency
   }
@@ -128,6 +137,14 @@ onMounted(async () => {
       :time-frame="timeFrame"
       :data="totalBalancesData"
     />
+
+    <CategorySpendPieChart
+      v-if="currency && categorySpendTimeSeriesData && selectedChart.id === 'category-spend'"
+      :currency="currency"
+      :time-frame="timeFrame"
+      :data="categorySpendTimeSeriesData"
+    />
+
     <FormGroup>
       <FormControl label="Currency">
         <select

web-app/src/pages/home/analytics/BalanceTimeSeriesChart.vue

@@ -1,23 +1,14 @@
 <script setup lang="ts">
 import {
-  CategoryScale,
   Chart,
   type ChartData,
   type ChartDataset,
   type ChartOptions,
-  Filler,
-  Legend,
-  LinearScale,
-  LineElement,
-  PointElement,
-  TimeScale,
-  Title,
-  Tooltip,
+  registerables,
 } from 'chart.js'
 import { computed, onMounted, ref } from 'vue'
 import type { BalanceTimeSeries, TimeFrame } from './util'
 import { integerMoneyToFloat, type Currency } from '@/api/data'
-import { getTime } from 'date-fns'
 import { Line } from 'vue-chartjs'
 
 const props = defineProps<{
@@ -30,17 +21,7 @@ const props = defineProps<{
 const chartData = computed(() => buildChartData())
 const chartOptions = ref<ChartOptions<'line'> | undefined>()
 
-Chart.register(
-  Title,
-  Tooltip,
-  Legend,
-  LineElement,
-  CategoryScale,
-  LinearScale,
-  PointElement,
-  TimeScale,
-  Filler,
-)
+Chart.register(...registerables)
 
 const COLORS = [
   [255, 69, 69],
@@ -82,10 +63,10 @@ function buildChartData(): ChartData<'line'> {
     const color = COLORS[colorIdx++]
     if (colorIdx >= COLORS.length) colorIdx = 0
 
-    const points = series.snapshots.map((p) => {
+    const points = series.data.map((p) => {
       return {
-        x: getTime(p.timestamp),
-        y: integerMoneyToFloat(p.balance, props.currency),
+        x: p.x,
+        y: integerMoneyToFloat(p.y, props.currency),
       }
     })
     datasets.push({
@@ -100,7 +81,6 @@ function buildChartData(): ChartData<'line'> {
       pointHitRadius: 5,
     })
   }
-
   return { datasets: datasets }
 }
 </script>

web-app/src/pages/home/analytics/CategorySpendPieChart.vue

@@ -0,0 +1,76 @@
+<script setup lang="ts">
+import { integerMoneyToFloat, type Currency } from '@/api/data'
+import type { TimeFrame } from './util'
+import type { CategorySpendTimeSeriesAnalytics } from '@/api/analytics'
+import { computed, onMounted, ref } from 'vue'
+import { type ChartOptions, type ChartData, Chart, registerables } from 'chart.js'
+import { Pie } from 'vue-chartjs'
+import { isAfter, isBefore } from 'date-fns'
+
+const props = defineProps<{
+  timeFrame: TimeFrame
+  currency: Currency
+  data: CategorySpendTimeSeriesAnalytics
+}>()
+
+const chartData = computed(() => buildChartData())
+const chartOptions = ref<ChartOptions<'pie'>>()
+
+Chart.register(...registerables)
+
+onMounted(() => {
+  chartOptions.value = {
+    plugins: {
+      title: {
+        display: true,
+        text: 'Category Spend',
+      },
+    },
+  }
+})
+
+function buildChartData(): ChartData<'pie'> {
+  const labels: string[] = []
+  const data: number[] = []
+  const colors: string[] = []
+
+  for (const categoryData of props.data.categories) {
+    labels.push(categoryData.categoryName)
+    colors.push('#' + categoryData.categoryColor)
+    if (!(props.currency.code in categoryData.dataByCurrency)) {
+      data.push(0)
+      continue
+    }
+
+    const sumOverTimeFrame = categoryData.dataByCurrency[props.currency.code]
+      .filter((d) => {
+        if (props.timeFrame.start && !isAfter(d.x, props.timeFrame.start)) {
+          return false
+        }
+        if (props.timeFrame.end && !isBefore(d.x, props.timeFrame.end)) {
+          return false
+        }
+        return true
+      })
+      .reduce((acc, v) => acc + v.y, 0)
+    data.push(integerMoneyToFloat(sumOverTimeFrame, props.currency))
+  }
+  return {
+    labels: labels,
+    datasets: [
+      {
+        data: data,
+        backgroundColor: colors,
+      },
+    ],
+  }
+}
+</script>
+<template>
+  <Pie
+    id="pie"
+    v-if="chartData && chartOptions"
+    :data="chartData"
+    :options="chartOptions"
+  />
+</template>

web-app/src/pages/home/analytics/util.ts

@@ -1,4 +1,4 @@
-import type { BalanceSnapshot } from '@/api/analytics'
+import type { TimeSeriesPoint } from '@/api/analytics'
 
 export interface TimeFrame {
   start?: Date
@@ -7,5 +7,5 @@ export interface TimeFrame {
 
 export interface BalanceTimeSeries {
   label: string
-  snapshots: BalanceSnapshot[]
+  data: TimeSeriesPoint[]
 }