feature: Add endpoint for campaign statistics

src/Campaigns/CampaignDonationQuery.php

@@ -2,6 +2,7 @@
 
 namespace Give\Campaigns;
 
+use DateTimeInterface;
 use Give\Campaigns\Models\Campaign;
 use Give\Donations\ValueObjects\DonationMetaKeys;
 use Give\Framework\QueryBuilder\JoinQueryBuilder;
@@ -36,6 +37,21 @@ public function __construct(Campaign $campaign)
         $this->where('campaign_forms.campaign_id', $campaign->id);
     }
 
+    /**
+     * @unreleased
+     */
+    public function between(DateTimeInterface $startDate, DateTimeInterface $endDate): self
+    {
+        $query = clone $this;
+        $query->joinDonationMeta('_give_completed_date', 'completed');
+        $query->whereBetween(
+            'completed.meta_value',
+            $startDate->format('Y-m-d H:i:s'),
+            $endDate->format('Y-m-d H:i:s')
+        );
+        return $query;
+    }
+
     /**
      * Returns a calculated sum of the intended amounts (without recovered fees) for the donations.
      *
@@ -45,9 +61,10 @@ public function __construct(Campaign $campaign)
      */
     public function sumIntendedAmount()
     {
-        $this->joinDonationMeta(DonationMetaKeys::AMOUNT, 'amount');
-        $this->joinDonationMeta('_give_fee_donation_amount', 'intendedAmount');
-        return $this->sum(
+        $query = clone $this;
+        $query->joinDonationMeta(DonationMetaKeys::AMOUNT, 'amount');
+        $query->joinDonationMeta('_give_fee_donation_amount', 'intendedAmount');
+        return $query->sum(
             /**
              * The intended amount meta and the amount meta could either be 0 or NULL.
              * So we need to use the NULLIF function to treat the 0 values as NULL.
@@ -63,16 +80,18 @@ public function sumIntendedAmount()
      */
     public function countDonations(): int
     {
-        return $this->count('donation.ID');
+        $query = clone $this;
+        return $query->count('donation.ID');
     }
 
     /**
      * @unreleased
      */
     public function countDonors(): int
     {
-        $this->joinDonationMeta(DonationMetaKeys::DONOR_ID, 'donorId');
-        return $this->count('DISTINCT donorId.meta_value');
+        $query = clone $this;
+        $query->joinDonationMeta(DonationMetaKeys::DONOR_ID, 'donorId');
+        return $query->count('DISTINCT donorId.meta_value');
     }
 
     /**

src/Campaigns/Routes/CampaignOverviewStatistics.php

@@ -0,0 +1,87 @@
+<?php
+
+namespace Give\Campaigns\Routes;
+
+use DateInterval;
+use DatePeriod;
+use DateTimeImmutable;
+use Give\API\RestRoute;
+use Give\Campaigns\CampaignDonationQuery;
+use Give\Campaigns\Models\Campaign;
+use Give\Framework\Support\Facades\DateTime\Temporal;
+
+class CampaignOverviewStatistics implements RestRoute
+{
+    /** @var string */
+    protected $endpoint = 'campaign-overview-statistics';
+
+    /**
+     * @unreleased
+     */
+    public function registerRoute()
+    {
+        register_rest_route(
+            'give-api/v2',
+            $this->endpoint,
+            [
+                [
+                    'methods' => 'GET',
+                    'callback' => [$this, 'handleRequest'],
+                    'permission_callback' => function () {
+                        return current_user_can('manage_options');
+                    },
+                ],
+                'args' => [
+                    'campaignId' => [
+                        'type' => 'integer',
+                        'required' => true,
+                        'validate_callback' => 'is_numeric',
+                    ],
+                    'rangeInDays' => [
+                        'type' => 'integer',
+                        'required' => false,
+                        'validate_callback' => 'is_numeric',
+                        'default' => 0, // Zero to mean "all time".
+                    ],
+                ],
+            ]
+        );
+    }
+
+    /**
+     * @unreleased
+     */
+    public function handleRequest($request)
+    {
+        $campaign = Campaign::find($request->get_param('campaignId'));
+
+        $query = new CampaignDonationQuery($campaign);
+
+        if(!$request->get_param('rangeInDays')) {
+            return [[
+                'amountRaised' => $query->sumIntendedAmount(),
+                'donationCount' => $query->countDonations(),
+                'donorCount' => $query->countDonors(),
+            ]];
+        }
+
+        $days = $request->get_param('rangeInDays');
+        $date = new DateTimeImmutable('now', wp_timezone());
+        $interval = DateInterval::createFromDateString("-$days days");
+        $period = new DatePeriod($date, $interval, 1);
+
+        return array_map(function($targetDate) use ($query, $interval) {
+
+            $query = $query->between(
+                Temporal::withStartOfDay($targetDate->add($interval)),
+                Temporal::withEndOfDay($targetDate)
+            );
+
+            return [
+                'amountRaised' => $query->sumIntendedAmount(),
+                'donationCount' => $query->countDonations(),
+                'donorCount' => $query->countDonors(),
+            ];
+        }, iterator_to_array($period) );
+    }
+}

src/Campaigns/ServiceProvider.php

@@ -46,6 +46,7 @@ private function registerRoutes()
         Hooks::addAction('rest_api_init', Routes\CreateCampaign::class, 'registerRoute');
         Hooks::addAction('rest_api_init', Routes\GetCampaignsListTable::class, 'registerRoute');
         Hooks::addAction('rest_api_init', Routes\DeleteCampaignListTable::class, 'registerRoute');
+        Hooks::addAction('rest_api_init', Routes\CampaignOverviewStatistics::class, 'registerRoute');
     }
 
     /**

src/Framework/Support/Facades/DateTime/Temporal.php

@@ -14,6 +14,9 @@
  * @method static string getFormattedDateTime(DateTimeInterface $dateTime)
  * @method static string getCurrentFormattedDateForDatabase()
  * @method static DateTimeInterface withoutMicroseconds(DateTimeInterface $dateTime)
+ * @method static DateTimeInterface withStartOfDay(DateTimeInterface $dateTime)
+ * @method static DateTimeInterface withEndOfDay(DateTimeInterface $dateTime)
+ * @method static DateTimeInterface immutableOrClone(DateTimeInterface $dateTime)
  */
 class Temporal extends Facade
 {

src/Framework/Support/Facades/DateTime/TemporalFacade.php

@@ -54,26 +54,51 @@ public function getCurrentFormattedDateForDatabase()
     /**
      * Immutably returns a new DateTime instance with the microseconds set to 0.
      *
+     * @unreleased Extracted new immutableOrClone method.
      * @since 2.20.0
      */
     public function withoutMicroseconds(DateTimeInterface $dateTime)
     {
-        if ($dateTime instanceof DateTimeImmutable) {
-            return $dateTime->setTime(
+        return $this
+            ->immutableOrClone($dateTime)
+            ->setTime(
                 $dateTime->format('H'),
                 $dateTime->format('i'),
                 $dateTime->format('s')
             );
-        }
+    }
 
-        $newDateTime = clone $dateTime;
+    /**
+     * Immutably returns a new DateTime instance with the time set to the start of the day.
+     *
+     * @unreleased
+     */
+    public function withStartOfDay(DateTimeInterface $dateTime): DateTimeInterface
+    {
+        return $this
+            ->immutableOrClone($dateTime)
+            ->setTime(0, 0, 0, 0);
+    }
 
-        $newDateTime->setTime(
-            $newDateTime->format('H'),
-            $newDateTime->format('i'),
-            $newDateTime->format('s')
-        );
+    /**
+     * Immutably returns a new DateTime instance with the time set to the end of the day.
+     *
+     * @unreleased
+     */
+    public function withEndOfDay(DateTimeInterface $dateTime): DateTimeInterface
+    {
+        return $this
+            ->immutableOrClone($dateTime)
+            ->setTime(23, 59, 59, 999999);
+    }
 
-        return $newDateTime;
+    /**
+     * @unreleased
+     */
+    public function immutableOrClone(DateTimeInterface $dateTime): DateTimeInterface
+    {
+        return $dateTime instanceof DateTimeImmutable
+            ? $dateTime
+            : clone $dateTime;
     }
 }

tests/Unit/Campaigns/Routes/CampaignOverviewStatisticsTest.php

@@ -0,0 +1,101 @@
+<?php
+
+namespace Give\Tests\Unit\Campaigns\Routes;
+
+use DateTime;
+use Give\Campaigns\Models\Campaign;
+use Give\Campaigns\Routes\CampaignOverviewStatistics;
+use Give\DonationForms\Models\DonationForm;
+use Give\Donations\Models\Donation;
+use Give\Donations\ValueObjects\DonationStatus;
+use Give\Framework\Database\DB;
+use Give\Framework\Support\ValueObjects\Money;
+use Give\Tests\TestCase;
+use Give\Tests\TestTraits\RefreshDatabase;
+use WP_REST_Request;
+
+final class CampaignOverviewStatisticsTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function testReturnsAllTimeDonationsStatistics()
+    {
+        $campaign = Campaign::factory()->create();
+        $form = DonationForm::factory()->create();
+
+        $db = DB::table('give_campaign_forms');
+        $db->insert(['form_id' => $form->id, 'campaign_id' => $campaign->id]);
+
+        Donation::factory()->create([
+            'formId' => $form->id,
+            'status' => DonationStatus::COMPLETE(),
+            'amount' => new Money(1000, 'USD'),
+            'createdAt' => new DateTime('-35 days'),
+        ]);
+        Donation::factory()->create([
+            'formId' => $form->id,
+            'status' => DonationStatus::COMPLETE(),
+            'amount' => new Money(1000, 'USD'),
+            'createdAt' => new DateTime('-5 days'),
+        ]);
+        Donation::factory()->create([
+            'formId' => $form->id,
+            'status' => DonationStatus::COMPLETE(),
+            'amount' => new Money(1000, 'USD'),
+            'createdAt' => new DateTime('now'),
+        ]);
+
+        $request = new WP_REST_Request('GET', '/give-api/v2/campaign-overview-statistics');
+        $request->set_param('campaignId', $campaign->id);
+
+        $route = new CampaignOverviewStatistics;
+        $response = $route->handleRequest($request);
+
+        $this->assertEquals(3, $response[0]['donorCount']);
+        $this->assertEquals(3, $response[0]['donationCount']);
+        $this->assertEquals(30, $response[0]['amountRaised']);
+    }
+
+    public function testReturnsPeriodStatisticsWithPreviousPeriod()
+    {
+        $campaign = Campaign::factory()->create();
+        $form = DonationForm::factory()->create();
+
+        $db = DB::table('give_campaign_forms');
+        $db->insert(['form_id' => $form->id, 'campaign_id' => $campaign->id]);
+
+        Donation::factory()->create([
+            'formId' => $form->id,
+            'status' => DonationStatus::COMPLETE(),
+            'amount' => new Money(1000, 'USD'),
+            'createdAt' => new DateTime('-35 days'),
+        ]);
+        Donation::factory()->create([
+            'formId' => $form->id,
+            'status' => DonationStatus::COMPLETE(),
+            'amount' => new Money(1000, 'USD'),
+            'createdAt' => new DateTime('-5 days'),
+        ]);
+        Donation::factory()->create([
+            'formId' => $form->id,
+            'status' => DonationStatus::COMPLETE(),
+            'amount' => new Money(1000, 'USD'),
+            'createdAt' => new DateTime('now'),
+        ]);
+
+        $request = new WP_REST_Request('GET', '/give-api/v2/campaign-overview-statistics');
+        $request->set_param('campaignId', $campaign->id);
+        $request->set_param('rangeInDays', 30);
+
+        $route = new CampaignOverviewStatistics;
+        $response = $route->handleRequest($request);
+
+        $this->assertEquals(2, $response[0]['donorCount']);
+        $this->assertEquals(2, $response[0]['donationCount']);
+        $this->assertEquals(20, $response[0]['amountRaised']);
+
+        $this->assertEquals(1, $response[1]['donorCount']);
+        $this->assertEquals(1, $response[1]['donationCount']);
+        $this->assertEquals(10, $response[1]['amountRaised']);
+    }
+}

tests/Unit/Framework/Support/Facades/DateTime/TemporalFacadeTest.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace Give\Tests\Unit\Framework\Support\Facades\DateTime;
+
+use DateTime;
+use DateTimeImmutable;
+use Give\Framework\Support\Facades\DateTime\TemporalFacade;
+use Give\Tests\TestCase;
+
+final class TemporalFacadeTest extends TestCase
+{
+    public function testImmutableOrCloneReturnsCloneOfDateTimeObject()
+    {
+        $dateTime = new DateTime;
+        $temporal = new TemporalFacade;
+
+        $newDateTime = $temporal->immutableOrClone($dateTime);
+
+        $this->assertNotSame($dateTime, $newDateTime);
+        $this->assertInstanceOf(DateTime::class, $newDateTime);
+    }
+
+    public function testImmutableOrCloneReturnsSameImmutableDateTimeObject()
+    {
+        $dateTime = new DateTimeImmutable;
+        $temporal = new TemporalFacade;
+
+        $newDateTime = $temporal->immutableOrClone($dateTime);
+
+        $this->assertSame($dateTime, $newDateTime);
+        $this->assertInstanceOf(DateTimeImmutable::class, $newDateTime);
+    }
+
+    public function testImmutableStartOfDay()
+    {
+        $dateTime = new DateTime('2020-01-01 12:34:56');
+        $temporal = new TemporalFacade;
+
+        $newDateTime = $temporal->withStartOfDay($dateTime);
+
+        $this->assertNotSame($dateTime, $newDateTime);
+        $this->assertEquals('2020-01-01 00:00:00', $newDateTime->format('Y-m-d H:i:s'));
+    }
+
+    public function testImmutableEndOfDay()
+    {
+        $dateTime = new DateTime('2020-01-01 12:34:56');
+        $temporal = new TemporalFacade;
+
+        $newDateTime = $temporal->withEndOfDay($dateTime);
+
+        $this->assertNotSame($dateTime, $newDateTime);
+        $this->assertEquals('2020-01-01 23:59:59.999999', $newDateTime->format('Y-m-d H:i:s.u'));
+    }
+}