Experimental code for issue #452

app/Generator/Chart/Basic/ChartJsGenerator.php

@@ -0,0 +1,64 @@
+<?php
+/**
+ * ChartJsGenerator.php
+ * Copyright (C) 2016 thegrumpydictator@gmail.com
+ *
+ * This software may be modified and distributed under the terms of the
+ * Creative Commons Attribution-ShareAlike 4.0 International License.
+ *
+ * See the LICENSE file for details.
+ */
+
+declare(strict_types = 1);
+
+namespace FireflyIII\Generator\Chart\Basic;
+
+/**
+ * Class ChartJsGenerator
+ *
+ * @package FireflyIII\Generator\Chart\Basic
+ */
+class ChartJsGenerator implements GeneratorInterface
+{
+
+    /**
+     * Will generate a Chart JS compatible array from the given input. Expects this format:
+     *
+     * 0: [
+     *    'label' => 'label of set',
+     *    'entries' =>
+     *        [
+     *         'label-of-entry' => 'value'
+     *        ]
+     *    ]
+     * 1: [
+     *    'label' => 'label of another set',
+     *    'entries' =>
+     *        [
+     *         'label-of-entry' => 'value'
+     *        ]
+     *    ]
+     *
+     *
+     * @param array $data
+     *
+     * @return array
+     */
+    public function multiSet(array $data): array
+    {
+        $chartData = [
+            'count'    => count($data),
+            'labels'   => array_keys($data[0]['entries']), // take ALL labels from the first set.
+            'datasets' => [],
+        ];
+
+        foreach ($data as $set) {
+            $chartData['datasets'][] = [
+                'label' => $set['label'],
+                'data'  => array_values($set['entries']),
+            ];
+        }
+
+        return $chartData;
+    }
+}

app/Generator/Chart/Basic/GeneratorInterface.php

@@ -0,0 +1,48 @@
+<?php
+/**
+ * GeneratorInterface.php
+ * Copyright (C) 2016 thegrumpydictator@gmail.com
+ *
+ * This software may be modified and distributed under the terms of the
+ * Creative Commons Attribution-ShareAlike 4.0 International License.
+ *
+ * See the LICENSE file for details.
+ */
+
+declare(strict_types = 1);
+
+namespace FireflyIII\Generator\Chart\Basic;
+
+/**
+ * Interface GeneratorInterface
+ *
+ * @package FireflyIII\Generator\Chart\Basic
+ */
+interface GeneratorInterface
+{
+    /**
+     * Will generate a Chart JS compatible array from the given input. Expects this format:
+     *
+     * 0: [
+     *    'label' => 'label of set',
+     *    'entries' =>
+     *        [
+     *         'label-of-entry' => 'value'
+     *        ]
+     *    ]
+     * 1: [
+     *    'label' => 'label of another set',
+     *    'entries' =>
+     *        [
+     *         'label-of-entry' => 'value'
+     *        ]
+     *    ]
+     *
+     *
+     * @param array $data
+     *
+     * @return array
+     */
+    public function multiSet(array $data): array;
+
+}

app/Http/Controllers/Chart/AccountController.php

@@ -17,6 +17,7 @@ use Carbon\Carbon;
 use Exception;
 use FireflyIII\Exceptions\FireflyException;
 use FireflyIII\Generator\Chart\Account\AccountChartGeneratorInterface;
+use FireflyIII\Generator\Chart\Basic\GeneratorInterface;
 use FireflyIII\Helpers\Collector\JournalCollectorInterface;
 use FireflyIII\Http\Controllers\Controller;
 use FireflyIII\Models\Account;
@@ -469,21 +470,33 @@ class AccountController extends Controller
             return $cache->get();
         }
 
+        $chartData = [
+
+        ];
+
         foreach ($accounts as $account) {
-            $balances = [];
-            $current  = clone $start;
-            $range    = Steam::balanceInRange($account, $start, clone $end);
-            $previous = round(array_values($range)[0], 2);
-            while ($current <= $end) {
-                $format     = $current->format('Y-m-d');
+            $currentSet   = [
+                'label'   => $account->name,
+                'entries' => [],
+            ];
+            $balances     = [];
+            $currentStart = clone $start;
+            $range        = Steam::balanceInRange($account, $start, clone $end);
+            $previous     = round(array_values($range)[0], 2);
+            while ($currentStart <= $end) {
+                $format     = $currentStart->format('Y-m-d');
+                $label      = $currentStart->formatLocalized(strval(trans('config.month_and_day')));
                 $balance    = isset($range[$format]) ? round($range[$format], 2) : $previous;
                 $previous   = $balance;
                 $balances[] = $balance;
-                $current->addDay();
+                $currentStart->addDay();
+                $currentSet['entries'][$label] = $balance;
             }
             $account->balances = $balances;
+            $chartData[]       = $currentSet;
         }
-        $data = $this->generator->frontpage($accounts, $start, $end);
+        $generator = app(GeneratorInterface::class);
+        $data      = $generator->multiSet($chartData);
         $cache->store($data);
 
         return $data;

app/Providers/FireflyServiceProvider.php

@@ -93,6 +93,9 @@ class FireflyServiceProvider extends ServiceProvider
         }
         );
 
+        // chart generator:
+        $this->app->bind('FireflyIII\Generator\Chart\Basic\GeneratorInterface', 'FireflyIII\Generator\Chart\Basic\ChartJsGenerator');
+
         $this->app->bind('FireflyIII\Repositories\Currency\CurrencyRepositoryInterface', 'FireflyIII\Repositories\Currency\CurrencyRepository');
         $this->app->bind('FireflyIII\Repositories\User\UserRepositoryInterface', 'FireflyIII\Repositories\User\UserRepository');
         $this->app->bind('FireflyIII\Helpers\Attachments\AttachmentHelperInterface', 'FireflyIII\Helpers\Attachments\AttachmentHelper');