How to write a custom data extractor - blog post

web/landing/assets/controllers/syntax_highlight_controller.js

@@ -2,6 +2,7 @@ import {Controller} from '@hotwired/stimulus';
 import 'highlight.js/styles/github-dark.min.css';
 import php from 'highlight.js/lib/languages/php';
 import shell from 'highlight.js/lib/languages/shell';
+import json from 'highlight.js/lib/languages/json';
 import hljs from 'highlight.js/lib/core';
 
 /* stimulusFetch: 'lazy' */
@@ -11,6 +12,7 @@ export default class extends Controller
     {
         hljs.registerLanguage('php', php);
         hljs.registerLanguage('shell', shell);
+        hljs.registerLanguage('json', json);
     }
 
     connect()

web/landing/assets/styles/app.css

@@ -25,3 +25,6 @@ a {
     @apply font-medium text-blue-600 dark:text-blue-500 hover:underline;
 }
 
+code {
+    font-size: 0.9em;
+}

web/landing/importmap.php

@@ -50,4 +50,7 @@
     'highlight.js/lib/languages/shell' => [
         'version' => '11.9.0',
     ],
+    'highlight.js/lib/languages/json' => [
+        'version' => '11.9.0',
+    ],
 ];

web/landing/src/Flow/Website/Controller/BlogController.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Flow\Website\Controller;
+
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+final class BlogController extends AbstractController
+{
+    public function __construct()
+    {
+    }
+
+    #[Route('/blog/{date}/{slug}', name: 'blog_post')]
+    public function post(string $date, string $slug) : Response
+    {
+        return $this->render('blog/' . $date . '/' . $slug . '/post.html.twig', [
+            'template_folder' => 'blog/' . $date . '/' . $slug,
+        ]);
+    }
+}

web/landing/src/Flow/Website/StaticSourceProvider/BlogPostsProvider.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Flow\Website\StaticSourceProvider;
+
+use NorbertTech\StaticContentGeneratorBundle\Content\{Source, SourceProvider};
+
+final class BlogPostsProvider implements SourceProvider
+{
+    public function __construct()
+    {
+
+    }
+
+    public function all() : array
+    {
+        $sources = [];
+
+        $sources[] = new Source('blog_post', ['date' => '2024-04-04', 'slug' => 'building-custom-extractor-google-analytics']);
+
+        return $sources;
+    }
+}

web/landing/templates/blog/2024-04-04/building-custom-extractor-google-analytics/accountSummary.json

@@ -0,0 +1,10 @@
+{
+  "name": string,
+  "account": string,
+  "displayName": string,
+  "propertySummaries": [
+    {
+      object (PropertySummary)
+    }
+  ]
+}

web/landing/templates/blog/2024-04-04/building-custom-extractor-google-analytics/extractor-01.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Flow\ETL\Adapter\GoogleAnalytics;
+
+use Flow\ETL\FlowContext;
+use Google\Analytics\Admin\V1beta\AccountSummary;
+use Google\Analytics\Admin\V1beta\AnalyticsAdminServiceClient;
+use Google\Analytics\Admin\V1beta\PropertySummary;
+use Flow\ETL\Extractor;
+use Flow\ETL\Extractor\Limitable;
+use Flow\ETL\Extractor\LimitableExtractor;
+
+final class AccountSummariesExtractor implements Extractor, LimitableExtractor
+{
+    use Limitable;
+
+    public function __construct(
+        private readonly AnalyticsAdminServiceClient $client,
+        private readonly int $pageSize = 200
+    ) {
+        if ($this->pageSize < 1 || $this->pageSize > 200) {
+            throw new \Flow\ETL\Exception\InvalidArgumentException('Page size must be greater than 0 and lower than 200.');
+        }
+    }
+
+    public function extract(FlowContext $context): \Generator
+    {
+        // TODO
+    }
+}

web/landing/templates/blog/2024-04-04/building-custom-extractor-google-analytics/extractor-02.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace Flow\ETL\Adapter\GoogleAnalytics;
+
+use Flow\ETL\Extractor\Signal;
+use Flow\ETL\FlowContext;
+use Google\Analytics\Admin\V1beta\AccountSummary;
+use Google\Analytics\Admin\V1beta\AnalyticsAdminServiceClient;
+use Google\Analytics\Admin\V1beta\PropertySummary;
+use Flow\ETL\Extractor;
+use Flow\ETL\Extractor\Limitable;
+use Flow\ETL\Extractor\LimitableExtractor;
+use function Flow\ETL\DSL\rows;
+
+final class AccountSummariesExtractor implements Extractor, LimitableExtractor
+{
+    // code from previous snippet
+
+    public function extract(FlowContext $context): \Generator
+    {
+        $list = $this->client->listAccountSummaries(['pageSize' => $this->pageSize]);
+
+        /** @var AccountSummary $account */
+        foreach ($list->iterateAllElements() as $accountSummary) {
+            $signal = yield rows(ga_account_summary_to_row($accountSummary));
+            $this->countRow();
+
+            if ($signal === Signal::STOP || $this->reachedLimit()) {
+                return;
+            }
+        }
+
+        // TODO: Implement pagination
+    }
+}

web/landing/templates/blog/2024-04-04/building-custom-extractor-google-analytics/extractor-03.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace Flow\ETL\Adapter\GoogleAnalytics;
+
+use Flow\ETL\Extractor\Signal;
+use Flow\ETL\FlowContext;
+use Google\Analytics\Admin\V1beta\AccountSummary;
+use Google\Analytics\Admin\V1beta\AnalyticsAdminServiceClient;
+use Google\Analytics\Admin\V1beta\PropertySummary;
+use Flow\ETL\Extractor;
+use Flow\ETL\Extractor\Limitable;
+use Flow\ETL\Extractor\LimitableExtractor;
+use function Flow\ETL\DSL\rows;
+
+final class AccountSummariesExtractor implements Extractor, LimitableExtractor
+{
+    // code from previous snippet
+
+    public function extract(FlowContext $context): \Generator
+    {
+        $list = $this->client->listAccountSummaries(['pageSize' => $this->pageSize]);
+
+        // code from previous snippet
+
+        while ($list->getPage()->hasNextPage()) {
+            $list = $this->client->listAccountSummaries(['pageSize' => $this->pageSize, 'pageToken' => $list->getPage()->getNextPageToken()]);
+
+            foreach ($list->iterateAllElements() as $accountSummary) {
+                $signal = yield rows(ga_account_summary_to_row($accountSummary));
+                $this->countRow();
+
+                if ($signal === Signal::STOP || $this->reachedLimit()) {
+                    return;
+                }
+            }
+        }
+    }
+}

web/landing/templates/blog/2024-04-04/building-custom-extractor-google-analytics/extractor-04.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace Flow\ETL\Adapter\GoogleAnalytics;
+
+use Flow\ETL\Extractor\Signal;
+use Flow\ETL\FlowContext;
+use Google\Analytics\Admin\V1beta\AccountSummary;
+use Google\Analytics\Admin\V1beta\AnalyticsAdminServiceClient;
+use Google\Analytics\Admin\V1beta\PropertySummary;
+use Flow\ETL\Extractor;
+use Flow\ETL\Extractor\Limitable;
+use Flow\ETL\Extractor\LimitableExtractor;
+use function Flow\ETL\DSL\rows;
+
+final class AccountSummariesExtractor implements Extractor, LimitableExtractor
+{
+    use Limitable;
+
+    public function __construct(
+        private readonly AnalyticsAdminServiceClient $client,
+        private readonly int $pageSize = 200
+    ) {
+        if ($this->pageSize < 1 || $this->pageSize > 200) {
+            throw new \Flow\ETL\Exception\InvalidArgumentException('Page size must be greater than 0 and lower than 200.');
+        }
+    }
+
+    public function extract(FlowContext $context): \Generator
+    {
+        $list = $this->client->listAccountSummaries(['pageSize' => $this->pageSize]);
+
+        /** @var AccountSummary $account */
+        foreach ($list->iterateAllElements() as $accountSummary) {
+            $signal = yield rows(ga_account_summary_to_row($accountSummary));
+            $this->countRow();
+
+            if ($signal === Signal::STOP || $this->reachedLimit()) {
+                return;
+            }
+        }
+
+        while ($list->getPage()->hasNextPage()) {
+            $list = $this->client->listAccountSummaries(['pageSize' => $this->pageSize, 'pageToken' => $list->getPage()->getNextPageToken()]);
+
+            foreach ($list->iterateAllElements() as $accountSummary) {
+                $signal = yield rows(ga_account_summary_to_row($accountSummary));
+                $this->countRow();
+
+                if ($signal === Signal::STOP || $this->reachedLimit()) {
+                    return;
+                }
+            }
+        }
+    }
+}

web/landing/templates/blog/2024-04-04/building-custom-extractor-google-analytics/from_ga_account_summaries.php

@@ -0,0 +1,9 @@
+<?php
+
+use Flow\ETL\Adapter\GoogleAnalytics\AccountSummariesExtractor;
+use Google\Analytics\Admin\V1beta\AnalyticsAdminServiceClient;
+
+function from_ga_account_summaries(AnalyticsAdminServiceClient $client, int $page_size = 200) : AccountSummariesExtractor
+{
+    return new GoogleAnalyticsExtractor($client, $page_size);
+}

web/landing/templates/blog/2024-04-04/building-custom-extractor-google-analytics/ga_account_summary_to_row.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace Flow\ETL\Adapter\GoogleAnalytics;
+
+use Flow\ETL\Row;
+use Google\Analytics\Admin\V1beta\AccountSummary;
+use Google\Analytics\Admin\V1beta\AnalyticsAdminServiceClient;
+use Google\Analytics\Admin\V1beta\PropertySummary;
+use function Flow\ETL\DSL\{list_entry, row, str_entry, structure_element, type_integer, type_list, type_string, type_structure};
+
+function ga_account_summary_to_row(AccountSummary $accountSummary) : Row
+{
+    return row(
+        str_entry('account', $accountSummary->getAccount()),
+        str_entry('name', $accountSummary->getName()),
+        str_entry('displayName', $accountSummary->getDisplayName()),
+        list_entry(
+            'propertySummaries',
+            array_map(
+                static fn(PropertySummary $propertySummary) => [
+                    'property' => $propertySummary->getProperty(),
+                    'displayName' => $propertySummary->getDisplayName(),
+                    'propertyType' => $propertySummary->getPropertyType(),
+                    'parent' => $propertySummary->getParent(),
+                ],
+                \iterator_to_array($accountSummary->getPropertySummaries())
+            ),
+            type_list(
+                type_structure(
+                    [
+                        structure_element('property', type_string()),
+                        structure_element('displayName', type_string()),
+                        structure_element('propertyType', type_integer()),
+                        structure_element('parent', type_string()),
+                    ]
+                )
+            ),
+        )
+    );
+}