MDL-75352 comment: implement comments datasource for custom reporting.

Create entity definition for a comment, join with user entity in new
report source to provide data for reportbuilder editor.

comment/classes/reportbuilder/datasource/comments.php

@@ -0,0 +1,99 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+declare(strict_types=1);
+
+namespace core_comment\reportbuilder\datasource;
+
+use core_reportbuilder\datasource;
+use core_reportbuilder\local\entities\user;
+use core_comment\reportbuilder\local\entities\comment;
+
+/**
+ * Comments datasource
+ *
+ * @package     core_comment
+ * @copyright   2022 Paul Holden <paulh@moodle.com>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class comments extends datasource {
+
+    /**
+     * Return user friendly name of the report source
+     *
+     * @return string
+     */
+    public static function get_name(): string {
+        return get_string('comments', 'core_comment');
+    }
+
+    /**
+     * Initialise report
+     */
+    protected function initialise(): void {
+        $commententity = new comment();
+        $commentalias = $commententity->get_table_alias('comments');
+
+        $this->set_main_table('comments', $commentalias);
+
+        $this->add_entity($commententity);
+
+        // Join the user entity to the comment userid (author).
+        $userentity = new user();
+        $useralias = $userentity->get_table_alias('user');
+        $this->add_entity($userentity
+            ->add_join("LEFT JOIN {user} {$useralias} ON {$useralias}.id = {$commentalias}.userid"));
+
+        // Add report elements from each of the entities we added to the report.
+        $this->add_all_from_entities();
+    }
+
+    /**
+     * Return the columns that will be added to the report upon creation
+     *
+     * @return string[]
+     */
+    public function get_default_columns(): array {
+        return [
+            'comment:context',
+            'comment:content',
+            'user:fullname',
+            'comment:timecreated',
+        ];
+    }
+
+    /**
+     * Return the filters that will be added to the report upon creation
+     *
+     * @return string[]
+     */
+    public function get_default_filters(): array {
+        return [
+            'comment:content',
+        ];
+    }
+
+    /**
+     * Return the conditions that will be added to the report upon creation
+     *
+     * @return string[]
+     */
+    public function get_default_conditions(): array {
+        return [
+            'user:fullname',
+        ];
+    }
+}

comment/classes/reportbuilder/local/entities/comment.php

@@ -0,0 +1,248 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+declare(strict_types=1);
+
+namespace core_comment\reportbuilder\local\entities;
+
+use context;
+use context_helper;
+use html_writer;
+use lang_string;
+use stdClass;
+use core_reportbuilder\local\entities\base;
+use core_reportbuilder\local\filters\{date, text};
+use core_reportbuilder\local\helpers\format;
+use core_reportbuilder\local\report\{column, filter};
+
+/**
+ * Comment entity
+ *
+ * @package     core_comment
+ * @copyright   2022 Paul Holden <paulh@moodle.com>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class comment extends base {
+
+    /**
+     * Database tables that this entity uses and their default aliases
+     *
+     * @return array
+     */
+    protected function get_default_table_aliases(): array {
+        return [
+            'comments' => 'c',
+            'context' => 'cmctx',
+        ];
+    }
+
+    /**
+     * The default title for this entity
+     *
+     * @return lang_string
+     */
+    protected function get_default_entity_title(): lang_string {
+        return new lang_string('comment', 'core_comment');
+    }
+
+    /**
+     * Initialise the entity
+     *
+     * @return base
+     */
+    public function initialise(): base {
+        $columns = $this->get_all_columns();
+        foreach ($columns as $column) {
+            $this->add_column($column);
+        }
+
+        // All the filters defined by the entity can also be used as conditions.
+        $filters = $this->get_all_filters();
+        foreach ($filters as $filter) {
+            $this
+                ->add_filter($filter)
+                ->add_condition($filter);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Returns list of all available columns
+     *
+     * @return column[]
+     */
+    protected function get_all_columns(): array {
+        global $DB;
+
+        $commentalias = $this->get_table_alias('comments');
+        $contextalias = $this->get_table_alias('context');
+
+        // Content.
+        $contentfieldsql = "{$commentalias}.content";
+        if ($DB->get_dbfamily() === 'oracle') {
+            $contentfieldsql = $DB->sql_order_by_text($contentfieldsql, 1024);
+        }
+        $columns[] = (new column(
+            'content',
+            new lang_string('content'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_LONGTEXT)
+            ->add_join("LEFT JOIN {context} {$contextalias} ON {$contextalias}.id = {$commentalias}.contextid")
+            ->add_field($contentfieldsql, 'content')
+            ->add_fields("{$commentalias}.format, {$commentalias}.contextid, " .
+                context_helper::get_preload_record_columns_sql($contextalias))
+            ->add_callback(static function($content, stdClass $comment): string {
+                if ($content === null) {
+                    return '';
+                }
+
+                context_helper::preload_from_record($comment);
+                $context = context::instance_by_id($comment->contextid);
+
+                return format_text($content, $comment->format, ['context' => $context]);
+            });
+
+        // Context.
+        $columns[] = (new column(
+            'context',
+            new lang_string('context'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TEXT)
+            ->add_join("LEFT JOIN {context} {$contextalias} ON {$contextalias}.id = {$commentalias}.contextid")
+            ->add_fields("{$commentalias}.contextid, " . context_helper::get_preload_record_columns_sql($contextalias))
+            // Sorting may not order alphabetically, but will at least group contexts together.
+            ->set_is_sortable(true)
+            ->add_callback(static function($contextid, stdClass $context): string {
+                if ($contextid === null) {
+                    return '';
+                }
+
+                context_helper::preload_from_record($context);
+                return context::instance_by_id($contextid)->get_context_name();
+            });
+
+        // Context URL.
+        $columns[] = (new column(
+            'contexturl',
+            new lang_string('contexturl'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TEXT)
+            ->add_join("LEFT JOIN {context} {$contextalias} ON {$contextalias}.id = {$commentalias}.contextid")
+            ->add_fields("{$commentalias}.contextid, " . context_helper::get_preload_record_columns_sql($contextalias))
+            // Sorting may not order alphabetically, but will at least group contexts together.
+            ->set_is_sortable(true)
+            ->add_callback(static function($contextid, stdClass $context): string {
+                if ($contextid === null) {
+                    return '';
+                }
+
+                context_helper::preload_from_record($context);
+                $context = context::instance_by_id($contextid);
+
+                return html_writer::link($context->get_url(), $context->get_context_name());
+            });
+
+        // Component.
+        $columns[] = (new column(
+            'component',
+            new lang_string('plugin'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TEXT)
+            ->add_fields("{$commentalias}.component");
+
+        // Area.
+        $columns[] = (new column(
+            'area',
+            new lang_string('pluginarea'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TEXT)
+            ->add_fields("{$commentalias}.commentarea");
+
+        // Item ID.
+        $columns[] = (new column(
+            'itemid',
+            new lang_string('pluginitemid'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_INTEGER)
+            ->add_fields("{$commentalias}.itemid")
+            ->set_disabled_aggregation_all();
+
+        // Time created.
+        $columns[] = (new column(
+            'timecreated',
+            new lang_string('timecreated', 'core_reportbuilder'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TIMESTAMP)
+            ->add_fields("{$commentalias}.timecreated")
+            ->add_callback([format::class, 'userdate']);
+
+        return $columns;
+    }
+
+    /**
+     * Return list of all available filters
+     *
+     * @return filter[]
+     */
+    protected function get_all_filters(): array {
+        global $DB;
+
+        $commentalias = $this->get_table_alias('comments');
+
+        // Content.
+        $filters[] = (new filter(
+            text::class,
+            'content',
+            new lang_string('content'),
+            $this->get_entity_name(),
+            $DB->sql_cast_to_char("{$commentalias}.content")
+        ))
+            ->add_joins($this->get_joins());
+
+        // Time created.
+        $filters[] = (new filter(
+            date::class,
+            'timecreated',
+            new lang_string('timecreated', 'core_reportbuilder'),
+            $this->get_entity_name(),
+            "{$commentalias}.timecreated"
+        ))
+            ->add_joins($this->get_joins())
+            ->set_limited_operators([
+                date::DATE_ANY,
+                date::DATE_RANGE,
+                date::DATE_LAST,
+                date::DATE_CURRENT,
+            ]);
+
+        return $filters;
+    }
+}