Refactored category spend and balance analytics.

2026-03-10 21:50:35 -04:00 · 2026-03-10 21:50:35 -04:00 · 3394869410
parent fb7850c181
commit 3394869410
12 changed files with 280 additions and 281 deletions
--- a/finnow-api/source/analytics/api.d
+++ b/finnow-api/source/analytics/api.d
@ -8,7 +8,7 @@ import std.datetime;
 import profile.data;
 import profile.service;
 import profile.api : PROFILE_PATH;
-import analytics.balances;
+import analytics.util;
 import util.money;
 import util.data;

@ -19,11 +19,24 @@ void handleGetCategorySpendTimeSeries(ref ServerHttpRequest request, ref ServerH
 }

@GetMapping(PROFILE_PATH ~ "/analytics/balance-time-series")
-void handleGetBalanceTimeSeriesV2(ref ServerHttpRequest request, ref ServerHttpResponse response) {
+void handleGetBalanceTimeSeries(ref ServerHttpRequest request, ref ServerHttpResponse response) {
+    import analytics.modules.balances;
    auto ds = getProfileDataSource(request);
    Currency currency = Currency.ofCode(request.getParamAs!string("currency", Currencies.USD.code));
-    TimeRange timeRange = TimeRange(Optional!(SysTime).empty(), Optional!(SysTime).empty());
-    auto data = computeBalanceTimeSeriesV2(ds, currency, timeRange);
+    auto data = computeBalanceTimeSeries(ds, currency, getTimeRange(request));
+    writeJsonBody(response, data);
+}
+
+@GetMapping(PROFILE_PATH ~ "/analytics/category-spend")
+void handleGetCategorySpend(ref ServerHttpRequest request, ref ServerHttpResponse response) {
+    import analytics.modules.category_spend;
+    auto ds = getProfileDataSource(request);
+    Currency currency = Currency.ofCode(request.getParamAs!string("currency", Currencies.USD.code));
+    long categoryParentId = request.getParamAs!long("parentId", -1);
+    Optional!ulong categoryParentIdOpt = categoryParentId == -1
+        ? Optional!(ulong).empty()
+        : Optional!(ulong).of(categoryParentId);
+    auto data = computeCategorySpend(ds, currency, getTimeRange(request), categoryParentIdOpt);
    writeJsonBody(response, data);
 }

@ -46,3 +59,16 @@ private void serveJsonFromProperty(ref ServerHttpResponse response, ref ProfileD
        response.writeBodyString(jsonStr, ContentTypes.APPLICATION_JSON);
    }
 }
+
+private TimeRange getTimeRange(in ServerHttpRequest request) {
+    long fromTimestampMs = request.getParamAs!long("from", -1);
+    long toTimestampMs = request.getParamAs!long("to", -1);
+    return TimeRange(
+        fromTimestampMs == -1
+            ? Optional!(SysTime).empty()
+            : Optional!(SysTime).of(toSysTime(fromTimestampMs)),
+        toTimestampMs == -1
+            ? Optional!(SysTime).empty()
+            : Optional!(SysTime).of(toSysTime(toTimestampMs))
+    );
+}
--- a/finnow-api/source/analytics/data.d
+++ b/finnow-api/source/analytics/data.d
@ -1,12 +1,23 @@
 module analytics.data;

 import std.datetime;
+import handy_http_primitives : Optional;
+import asdf : serdeTransformOut;

 import util.money;
 import util.data;
-import analytics.balances;
 import account.model;

+/**
+ * A common time-series data point.
+ */
+struct TimeSeriesPoint {
+    /// The millisecond UTC timestamp.
+    ulong x;
+    /// The value at this timestamp.
+    long y;
+}
+
 struct JournalEntryStub {
    SysTime timestamp;
    ulong accountId;
@ -21,6 +32,15 @@ struct BalanceRecordStub {
    long value;
 }

+struct CategorySpendData {
+    ulong categoryId;
+    string categoryName;
+    string categoryColor;
+    @serdeTransformOut!serializeOptional
+    Optional!ulong parentCategoryId;
+    long amount;
+}
+
 /**
 * Repository that provides various functions for fetching data that's used in
 * the calculation of analytics, separate from usual app functionality.
@ -34,4 +54,8 @@ interface AnalyticsRepository {
        in Currency currency,
        in TimeRange timeRange
    );
+    CategorySpendData[] getCategorySpendData(
+        in Currency currency,
+        in TimeRange timeRange
+    );
 }
--- a/finnow-api/source/analytics/data_impl_sqlite.d
+++ b/finnow-api/source/analytics/data_impl_sqlite.d
@ -8,7 +8,7 @@ import util.money;
 import util.data;
 import util.sqlite;
 import account.model : AccountJournalEntryType, AccountType;
-import analytics.balances;
+import analytics.modules.balances;
 import analytics.data;

 class SqliteAnalyticsRepository : AnalyticsRepository {
@ -101,4 +101,53 @@ class SqliteAnalyticsRepository : AnalyticsRepository {
        }
        return app[];
    }
+
+    CategorySpendData[] getCategorySpendData(
+        in Currency currency,
+        in TimeRange timeRange
+    ) {
+        QueryBuilder qb = QueryBuilder("transaction_category c")
+            .select("c.id,c.name,c.color,c.parent_id")
+            .select(`
+                (
+                    SUM(CASE WHEN je.type LIKE 'DEBIT' THEN je.amount ELSE 0 END)
+                    - SUM(CASE WHEN je.type LIKE 'CREDIT' THEN je.amount ELSE 0 END)
+                )
+            `)
+            .join("LEFT JOIN \"transaction\" t ON t.category_id = c.id")
+            .join("LEFT JOIN account_journal_entry je ON je.transaction_id = t.id");
+        qb.where("t.internal_transfer = false");
+        qb.where("t.currency = ?");
+        qb.withArgBinding((ref stmt, ref idx) {
+            stmt.bind(idx++, currency.codeString);
+        });
+        if (timeRange.fromTime) {
+            qb.where("t.timestamp >= ?")
+                .withArgBinding((ref stmt, ref idx) {
+                    stmt.bind(idx++, timeRange.fromTime.value);
+                });
+        }
+        if (timeRange.toTime) {
+            qb.where("t.timestamp <= ?")
+                .withArgBinding((ref stmt, ref idx) {
+                    stmt.bind(idx++, timeRange.fromTime.value);
+                });
+        }
+        string query = qb.build() ~ " GROUP BY c.id ORDER BY c.id";
+        Statement stmt = db.prepare(query);
+        qb.applyArgBindings(stmt);
+        ResultRange result = stmt.execute();
+        Appender!(CategorySpendData[]) app;
+        foreach (row; result) {
+            import std.typecons : Nullable;
+            app ~= CategorySpendData(
+                row.peek!ulong(0),
+                row.peek!string(1),
+                row.peek!string(2),
+                toOptional(row.peek!(Nullable!ulong)(3)),
+                row.peek!long(4)
+            );
+        }
+        return app[];
+    }
 }
--- a/finnow-api/source/analytics/modules/balances.d
+++ b/finnow-api/source/analytics/modules/balances.d
@ -1,4 +1,4 @@
-module analytics.balances;
+module analytics.modules.balances;

 import handy_http_primitives : Optional, mapIfPresent;
 import std.datetime;
@ -24,13 +24,6 @@ import util.money;
 import util.data;
 import analytics.data;

-struct TimeSeriesPoint {
-    /// The millisecond UTC timestamp.
-    ulong x;
-    /// The value at this timestamp.
-    long y;
-}
-
 struct AccountBalanceData {
    ulong accountId;
    TimeSeriesPoint[] data;
@ -51,7 +44,7 @@ struct BalanceTimeSeriesAnalytics {
 * Returns: An analytics response containing a "totals" time series, as well
 * as a time series for each known account in the given time range.
 */
-BalanceTimeSeriesAnalytics computeBalanceTimeSeriesV2(
+BalanceTimeSeriesAnalytics computeBalanceTimeSeries(
    ProfileDataSource ds,
    in Currency currency,
    in TimeRange timeRange
@ -151,75 +144,3 @@ private Optional!long deriveBalance(
    }
    return Optional!(long).of(balance);
 }
-
-
-alias CurrencyGroupedTimeSeries = TimeSeriesPoint[][string];
-
-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;
-}
--- a/finnow-api/source/analytics/modules/category_spend.d
+++ b/finnow-api/source/analytics/modules/category_spend.d
@ -0,0 +1,49 @@
+module analytics.modules.category_spend;
+
+import handy_http_primitives : Optional;
+import std.algorithm;
+import std.array;
+
+import analytics.data;
+import profile.data;
+import util.money : Currency;
+import util.data : TimeRange;
+
+CategorySpendData[] computeCategorySpend(
+    ProfileDataSource ds,
+    in Currency currency,
+    in TimeRange timeRange,
+    in Optional!ulong parentId
+) {
+    AnalyticsRepository repo = ds.getAnalyticsRepository();
+    CategorySpendData[] allCategories = repo.getCategorySpendData(currency, timeRange);
+    return allCategories
+        .filter!(d => (
+            parentId
+            ? d.parentCategoryId && d.parentCategoryId.value == parentId.value
+            : d.parentCategoryId.isNull
+        ))
+        .map!((category) {
+            // For each category that we're reporting on, recursively sum up
+            // the amount of the category and all its children.
+            long totalRecursiveSum = sumAllChildCategoriesRecursive(category, allCategories);
+            return CategorySpendData(
+                category.categoryId,
+                category.categoryName,
+                category.categoryColor,
+                category.parentCategoryId,
+                totalRecursiveSum
+            );
+        })
+        .array();
+}
+
+private long sumAllChildCategoriesRecursive(in CategorySpendData parentCategory, in CategorySpendData[] data) {
+    long sum = parentCategory.amount;
+    foreach (category; data) {
+        if (category.parentCategoryId && category.parentCategoryId.value == parentCategory.categoryId) {
+            sum += sumAllChildCategoriesRecursive(category, data);
+        }
+    }
+    return sum;
+}
--- a/finnow-api/source/analytics/package.d
+++ b/finnow-api/source/analytics/package.d
@ -1,28 +0,0 @@
-module analytics;
-
-public import analytics.balances;
-
-import profile.data;
-import profile.model;
-
-/**
- * Helper function to run a function on each available user profile.
- * Params:
- *   fn = The function to run.
- */
-void doForAllUserProfiles(
-    void function(Profile, ProfileRepository) fn
-) {
-    import auth.data;
-    import auth.data_impl_fs;
-    import profile.data;
-    import profile.data_impl_sqlite;
-
-    UserRepository userRepo = new FileSystemUserRepository();
-    foreach (user; userRepo.findAll()) {
-        ProfileRepository profileRepo = new FileSystemProfileRepository(user.username);
-        foreach (prof; profileRepo.findAll()) {
-            fn(prof, profileRepo);
-        }
-    }
-}
--- a/finnow-api/source/analytics/util.d
+++ b/finnow-api/source/analytics/util.d
@ -34,8 +34,6 @@ SysTime[] generateTimeSeriesTimestamps(Duration intervalSize, in TimeRange timeR
    } else {
        startOfRange = timeRange.fromTime.value;
    }
-    import std.stdio;
-    writefln!"start = %s, end = %s"(startOfRange, endOfRange);

    Appender!(SysTime[]) app;
    app ~= startOfRange;
@ -51,3 +49,7 @@ SysTime[] generateTimeSeriesTimestamps(Duration intervalSize, in TimeRange timeR
 ulong toUnixMillis(in SysTime ts) {
    return (ts - SysTime(unixTimeToStdTime(0))).total!"msecs";
 }
+
+SysTime toSysTime(in ulong unixMillis) {
+    return SysTime(unixTimeToStdTime(0)) + msecs(unixMillis);
+}
--- a/finnow-api/source/scheduled_jobs.d
+++ b/finnow-api/source/scheduled_jobs.d
@ -4,8 +4,6 @@ import scheduled;
 import std.datetime;
 import slf4d;

-import analytics;
-
 void startScheduledJobs() {
 	JobSchedule analyticsSchedule = new FixedIntervalSchedule(
 		hours(1),
@ -13,10 +11,9 @@ void startScheduledJobs() {
 	);

 	JobScheduler jobScheduler = new TaskPoolScheduler();
-	jobScheduler.addJob(() {
-		info("Computing account balance time series analytics for all users...");
-		doForAllUserProfiles(&computeCategorySpendTimeSeries);
-		info("Done computing analytics!");
-	}, analyticsSchedule);
-	jobScheduler.start();
+	// jobScheduler.addJob(() {
+	// 	info("Computing account balance time series analytics for all users...");
+	// 	info("Done computing analytics!");
+	// }, analyticsSchedule);
+	// jobScheduler.start();
 }
--- a/web-app/src/api/analytics.ts
+++ b/web-app/src/api/analytics.ts
@ -7,28 +7,22 @@ export interface TimeSeriesPoint {
  y: number
 }

-export type CurrencyGroupedTimeSeries = Record<string, TimeSeriesPoint[]>
-
 export interface AccountBalanceData {
  accountId: number
-  currencyCode: string
  data: TimeSeriesPoint[]
 }

 export interface BalanceTimeSeriesAnalytics {
  accounts: AccountBalanceData[]
-  totals: CurrencyGroupedTimeSeries
+  totals: TimeSeriesPoint[]
 }

 export interface CategorySpendData {
-  categoryId: number
-  categoryName: string
-  categoryColor: string
-  dataByCurrency: CurrencyGroupedTimeSeries
-}
-
-export interface CategorySpendTimeSeriesAnalytics {
-  categories: CategorySpendData[]
+  categoryId: number | null
+  categoryName: string | null
+  categoryColor: string | null
+  parentCategoryId: number | null
+  amount: number
 }

 export class AnalyticsApiClient extends ApiClient {
@ -41,11 +35,39 @@ export class AnalyticsApiClient extends ApiClient {
    this.path = `/profiles/${this.profileName}/analytics`
  }

-  getBalanceTimeSeries(): Promise<BalanceTimeSeriesAnalytics> {
-    return super.getJson(this.path + '/balance-time-series')
+  getBalanceTimeSeries(
+    currencyCode: string,
+    fromTimestampMs: number | null,
+    toTimestampMs: number | null,
+  ): Promise<BalanceTimeSeriesAnalytics> {
+    const params = new URLSearchParams()
+    params.append('currency', currencyCode)
+    if (fromTimestampMs !== null) {
+      params.append('from', fromTimestampMs + '')
+    }
+    if (toTimestampMs !== null) {
+      params.append('to', toTimestampMs + '')
+    }
+    return super.getJson(this.path + '/balance-time-series?' + params.toString())
  }

-  getCategorySpendTimeSeries(): Promise<CategorySpendTimeSeriesAnalytics> {
-    return super.getJson(this.path + '/category-spend-time-series')
+  getCategorySpend(
+    currencyCode: string,
+    fromTimestampMs: number | null,
+    toTimestampMs: number | null,
+    parentCategoryId: number | null,
+  ): Promise<CategorySpendData[]> {
+    const params = new URLSearchParams()
+    params.append('currency', currencyCode)
+    if (fromTimestampMs !== null) {
+      params.append('from', fromTimestampMs + '')
+    }
+    if (toTimestampMs !== null) {
+      params.append('to', toTimestampMs + '')
+    }
+    if (parentCategoryId !== null) {
+      params.append('parentId', parentCategoryId + '')
+    }
+    return super.getJson(this.path + '/category-spend?' + params.toString())
  }
 }
--- a/web-app/src/pages/home/AnalyticsModule.vue
+++ b/web-app/src/pages/home/AnalyticsModule.vue
@ -1,29 +1,27 @@
 <script setup lang="ts">
 import { AccountApiClient, type Account } from '@/api/account'
 import HomeModule from '@/components/HomeModule.vue'
-import { computed, onMounted, ref, type ComputedRef } from 'vue'
+import { computed, onMounted, ref } from 'vue'
 import 'chartjs-adapter-date-fns'
 import type { Currency } from '@/api/data'
 import {
  AnalyticsApiClient,
-  type CategorySpendTimeSeriesAnalytics,
-  type BalanceTimeSeriesAnalytics,
 } from '@/api/analytics'
-import BalanceTimeSeriesChart from './analytics/BalanceTimeSeriesChart.vue'
-import type { TimeFrame, BalanceTimeSeries } from './analytics/util'
+import type { TimeFrame } 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 { startOfMonth, startOfYear, sub } from 'date-fns'
 import { useRoute } from 'vue-router'
 import CategorySpendPieChart from './analytics/CategorySpendPieChart.vue'
+import BalanceTimeSeriesChart from './analytics/BalanceTimeSeriesChart.vue'

 const route = useRoute()
+const analyticsApi = computed(() => {
+  return new AnalyticsApiClient(route)
+})

 const accounts = ref<Account[]>([])

-const balanceTimeSeriesData = ref<BalanceTimeSeriesAnalytics>()
-const categorySpendTimeSeriesData = ref<CategorySpendTimeSeriesAnalytics>()
-
 const currency = ref<Currency>()
 const timeFrame = ref<TimeFrame>({})

@ -34,7 +32,6 @@ interface AnalyticsChartType {

 const AnalyticsChartTypes: AnalyticsChartType[] = [
  { id: 'account-balances', name: 'Account Balances' },
-  { id: 'total-balances', name: 'Total Balance' },
  { id: 'category-spend', name: 'Category Spend' },
 ]

@ -50,54 +47,9 @@ const availableCurrencies = computed(() => {
  return currencies
 })

-const accountBalancesData: ComputedRef<BalanceTimeSeries[]> = computed(() => {
-  if (!balanceTimeSeriesData.value) return []
-  const eligibleAccounts = accounts.value.filter((a) => a.currency.code === currency.value?.code)
-  const series: BalanceTimeSeries[] = []
-  for (const accountData of balanceTimeSeriesData.value.accounts) {
-    const account = eligibleAccounts.find((a) => a.id === accountData.accountId)
-    if (account !== undefined) {
-      const filteredTimeSeries = accountData.data.filter((s) => {
-        if (timeFrame.value.start && !isAfter(s.x, timeFrame.value.start)) {
-          return false
-        }
-        if (timeFrame.value.end && !isBefore(s.x, timeFrame.value.end)) {
-          return false
-        }
-        return true
-      })
-      series.push({
-        label: account.name,
-        data: filteredTimeSeries,
-      })
-    }
-  }
-  return series
-})
-
-const totalBalancesData: ComputedRef<BalanceTimeSeries[]> = computed(() => {
-  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.x, timeFrame.value.end)) {
-      return false
-    }
-    return true
-  })
-  return [{ label: currencyCode, data: filteredTimeSeries }]
-})
-
 onMounted(async () => {
  const api = new AccountApiClient(route)
-  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
  }
@ -108,61 +60,30 @@ onMounted(async () => {
    <FormGroup>
      <FormControl label="Chart">
        <select v-model="selectedChart">
-          <option
-            v-for="ct in AnalyticsChartTypes"
-            :key="ct.id"
-            :value="ct"
-          >
+          <option v-for="ct in AnalyticsChartTypes" :key="ct.id" :value="ct">
            {{ ct.name }}
          </option>
        </select>
      </FormControl>
    </FormGroup>

-    <BalanceTimeSeriesChart
-      v-if="currency && balanceTimeSeriesData && selectedChart.id === 'account-balances'"
-      title="Account Balances"
-      :currency="currency"
-      :time-frame="timeFrame"
-      :data="accountBalancesData"
-    />
+    <BalanceTimeSeriesChart v-if="currency && selectedChart.id === 'account-balances'" title="Account Balances"
+      :currency="currency" :time-frame="timeFrame" :api="analyticsApi" />

-    <BalanceTimeSeriesChart
-      v-if="currency && balanceTimeSeriesData && selectedChart.id === 'total-balances'"
-      title="Total Balances"
-      :currency="currency"
-      :time-frame="timeFrame"
-      :data="totalBalancesData"
-    />
-
-    <CategorySpendPieChart
-      v-if="currency && categorySpendTimeSeriesData && selectedChart.id === 'category-spend'"
-      :currency="currency"
-      :time-frame="timeFrame"
-      :data="categorySpendTimeSeriesData"
-    />
+    <CategorySpendPieChart v-if="currency && selectedChart.id === 'category-spend'" :currency="currency"
+      :api="analyticsApi" :time-frame="timeFrame" />

    <FormGroup>
      <FormControl label="Currency">
-        <select
-          v-model="currency"
-          :disabled="availableCurrencies.length < 2"
-        >
-          <option
-            v-for="currency in availableCurrencies"
-            :key="currency.code"
-            :value="currency"
-          >
+        <select v-model="currency" :disabled="availableCurrencies.length < 2">
+          <option v-for="currency in availableCurrencies" :key="currency.code" :value="currency">
            {{ currency.code }}
          </option>
        </select>
      </FormControl>
      <FormControl label="Time Frame">
        <select v-model="timeFrame">
-          <option
-            :value="{}"
-            selected
-          >
+          <option :value="{}" selected>
            All Time
          </option>
          <option :value="{ start: sub(new Date(), { days: 30 }) }">Last 30 days</option>
--- a/web-app/src/pages/home/analytics/BalanceTimeSeriesChart.vue
+++ b/web-app/src/pages/home/analytics/BalanceTimeSeriesChart.vue
@ -6,19 +6,20 @@ import {
  type ChartOptions,
  registerables,
 } from 'chart.js'
-import { computed, onMounted, ref } from 'vue'
-import type { BalanceTimeSeries, TimeFrame } from './util'
+import { onMounted, ref, watch } from 'vue'
+import type { TimeFrame } from './util'
 import { integerMoneyToFloat, type Currency } from '@/api/data'
 import { Line } from 'vue-chartjs'
+import type { AnalyticsApiClient } from '@/api/analytics'

 const props = defineProps<{
  title: string
  timeFrame: TimeFrame
  currency: Currency
-  data: BalanceTimeSeries[]
+  api: AnalyticsApiClient
 }>()

-const chartData = computed(() => buildChartData())
+const chartData = ref<ChartData<'line'>>()
 const chartOptions = ref<ChartOptions<'line'> | undefined>()

 Chart.register(...registerables)
@ -55,11 +56,25 @@ onMounted(() => {
  }
 })

-function buildChartData(): ChartData<'line'> {
+watch(
+  [() => props.currency, () => props.timeFrame],
+  () => {
+    buildChartData()
+  },
+  { immediate: true, deep: true }
+)
+
+async function buildChartData() {
+  const balanceAnalytics = await props.api.getBalanceTimeSeries(
+    props.currency.code,
+    props.timeFrame.start ? props.timeFrame.start.getTime() : null,
+    props.timeFrame.end ? props.timeFrame.end.getTime() : null
+  )
+
  const datasets: ChartDataset<'line'>[] = []
  let colorIdx = 0

-  for (const series of props.data) {
+  for (const series of balanceAnalytics.accounts) {
    const color = COLORS[colorIdx++]
    if (colorIdx >= COLORS.length) colorIdx = 0

@ -70,7 +85,7 @@ function buildChartData(): ChartData<'line'> {
      }
    })
    datasets.push({
-      label: series.label,
+      label: 'Account ' + series.accountId,
      data: points,
      cubicInterpolationMode: 'monotone',
      borderColor: `rgb(${color[0]}, ${color[1]}, ${color[2]})`,
@ -81,13 +96,11 @@ function buildChartData(): ChartData<'line'> {
      pointHitRadius: 5,
    })
  }
-  return { datasets: datasets }
+  chartData.value = { datasets: datasets }
 }
 </script>
 <template>
-  <Line
-    v-if="chartData && chartOptions"
-    :data="chartData"
-    :options="chartOptions"
-  />
+  <div>
+    <Line v-if="chartData && chartOptions" :data="chartData" :options="chartOptions" />
+  </div>
 </template>
--- a/web-app/src/pages/home/analytics/CategorySpendPieChart.vue
+++ b/web-app/src/pages/home/analytics/CategorySpendPieChart.vue
@ -1,19 +1,18 @@
 <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 { onMounted, ref, watch } from 'vue'
 import { type ChartOptions, type ChartData, Chart, registerables } from 'chart.js'
 import { Pie } from 'vue-chartjs'
-import { isAfter, isBefore } from 'date-fns'
+import type { AnalyticsApiClient } from '@/api/analytics'

 const props = defineProps<{
  timeFrame: TimeFrame
  currency: Currency
-  data: CategorySpendTimeSeriesAnalytics
+  api: AnalyticsApiClient
 }>()

-const chartData = computed(() => buildChartData())
+const chartData = ref<ChartData<'pie'>>()
 const chartOptions = ref<ChartOptions<'pie'>>()

 Chart.register(...registerables)
@ -29,33 +28,36 @@ onMounted(() => {
  }
 })

-function buildChartData(): ChartData<'pie'> {
+watch(
+  [() => props.currency, () => props.timeFrame],
+  () => {
+    buildChartData()
+  },
+  { immediate: true, deep: true }
+)
+
+async function buildChartData() {
+  const categorySpendData = await props.api.getCategorySpend(
+    props.currency.code,
+    props.timeFrame.start ? props.timeFrame.start.getTime() : null,
+    props.timeFrame.end ? props.timeFrame.end.getTime() : null,
+    null
+  )
+  if (categorySpendData.length === 0) {
+    chartData.value = undefined
+    return
+  }
+
  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
+  for (const categoryData of categorySpendData) {
+    labels.push(categoryData.categoryName ?? 'Uncategorized')
+    colors.push(categoryData.categoryColor ? '#' + categoryData.categoryColor : 'white')
+    data.push(integerMoneyToFloat(categoryData.amount, props.currency))
  }
-
-    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 {
+  chartData.value = {
    labels: labels,
    datasets: [
      {
@ -67,10 +69,11 @@ function buildChartData(): ChartData<'pie'> {
 }
 </script>
 <template>
-  <Pie
-    id="pie"
-    v-if="chartData && chartOptions"
-    :data="chartData"
-    :options="chartOptions"
-  />
+
+  <div>
+    <Pie id="pie" v-if="chartData && chartOptions" :data="chartData" :options="chartOptions" />
+    <p v-if="!chartData">
+      No category spending data is available for this selection of filters.
+    </p>
+  </div>
 </template>