IndexDB::init_method_table() - Code Metrics - Inspection of "wrote serialization of graph database." - lechimp-p/dicto.php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( addc16...69f641 )

by Richard

created 2016-10-02 11:52 UTC

IndexDB::init_method_table() B

↳ Parent: Project

Complexity

Conditions	1
Paths	1

Size

Total Lines	32
Code Lines	25

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	32
rs	8.8571
c	0
b	0
f	0
cc	1
eloc	25
nc	1
nop	3

<?php
/******************************************************************************
 * An implementation of dicto (scg.unibe.ch/dicto) in and for PHP.
 *
 * Copyright (c) 2016, 2015 Richard Klees <[email protected]>
 *
 * This software is licensed under The MIT License. You should have received
 * a copy of the license along with the code.
 */

namespace Lechimp\Dicto\App;

use Lechimp\Dicto\Graph;
use Doctrine\DBAL\Schema;
use Doctrine\DBAL\Types\Type;
use Doctrine\DBAL\Schema\Synchronizer\SingleDatabaseSynchronizer;
use Doctrine\DBAL\Statement;

class IndexDB extends DB {
    /**
     * Write the index to the database.
     *
     * @param   Graph\IndexDB   $index
     * @return  null
     */
    public function write_index(Graph\IndexDB $index) {
        $this->prepare_insert_statements();
        $max_id = $this->serialize_nodes($index);
        $this->serialize_relations($index, $max_id);
    }

    /**
     * Read the index from the database.
     *
     * @return  Graph\IndexDB   $index
     */
    public function read_index() {
        $index = $this->build_graph_index_db();
        $this->deserialize_nodes_to($index);
        $this->deserialize_relations_to($index);
        return $index;
    }

    protected function build_graph_index_db() {
        return new Graph\IndexDB();
    }

    // WRITE

    protected function serialize_nodes(Graph\IndexDB $index) {
        $max_id = 0;
        foreach ($index->nodes() as $node) {
            $id = $node->id();
            $this->insert_entity_stmt->execute([$node->id(), $node->type()]);
            $max_id = max($max_id, $id);
            $this->insert_properties($id, $node);
        }
        return $max_id;
    }

    protected function serialize_relations(Graph\IndexDB $index, $id) {
        foreach ($index->nodes() as $node) {
            foreach ($node->relations() as $relation) {
                $id++;
                $this->insert_entity_stmt->execute([$id, $relation->type()]);
                $this->insert_properties($id, $relation);
                $this->insert_relation_stmt->execute([$node->id(), $id, $relation->target()->id()]);
            }
        }
    }

    protected $insert_entity_stmt;
    protected $insert_property_stmt;
    protected $insert_relation_stmt;

    protected function prepare_insert_statements() {
        $this->insert_entity_stmt = $this->connection->prepare
            ( "INSERT INTO entities (id, type)\n"
            . "VALUES (?, ?)"
            );
        $this->insert_property_stmt = $this->connection->prepare
            ( "INSERT INTO properties (entity_id, key, is_entity, value)\n"
            . "VALUES (?, ?, ?, ?)"
            );
        $this->insert_relation_stmt = $this->connection->prepare
            ( "INSERT INTO relations (source_id, entity_id, target_id)\n"
            . "VALUES (?, ?, ?)"
            );
    }

    protected function insert_properties($id, Graph\Entity $e) {
        foreach ($e->properties() as $key => $value) {
            $this->insert_property($id, $key, $value);
        }
    }

    protected function insert_property($entity_id, $key, $value) {
        $is_entity = false;
        if ($value instanceof Graph\Node) {
            $is_entity = true;
            $value = $value->id();
        }
        if ($value instanceof Graph\Relation) {
            throw new \LogicException("Can't serialize Relation properties (NYI!)");
        }
        $value = serialize($value);
        $this->insert_property_stmt->execute([$entity_id, $key, $is_entity, $value]);
    }

    // READ

    protected function deserialize_nodes_to(Graph\IndexDB $index) {
        $res = $this->connection->executeQuery
            ( "SELECT entities.id, entities.type FROM entities\n"
            . "LEFT JOIN relations ON entities.id = relations.entity_id\n"
            . "WHERE relations.source_id IS NULL"
            );
        while ($row = $res->fetch()) {
            $properties = $this->select_properties($row["id"], $index);
            $node = $index->create_node($row["type"], $properties);
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}
            assert('$row["id"] == $node->id()');
        }
    }

    protected function deserialize_relations_to(Graph\IndexDB $index) {
        $res = $this->connection->executeQuery
            ( "SELECT source_id, entity_id, target_id, type FROM relations\n"
            . "JOIN entities ON entities.id = relations.entity_id\n"
            . "ORDER BY source_id, entity_id"
            );
        $node = null;
        while ($row = $res->fetch()) {
            if ($node === null || $node->id() != $row["source_id"]) {
                $node = $index->node((int)$row["source_id"]);
            }
            $other = $index->node((int)$row["target_id"]);
            $properties = $this->select_properties($row["entity_id"], $index);
            $node->add_relation($row["type"], $properties, $other);
        }
    }


    protected function select_properties($id, $index) {
        $id = (int)$id;
        $res = $this->connection->executeQuery
            ( "SELECT key, is_entity, value FROM properties\n"
            . "WHERE entity_id = $id"
            );
        $props = [];
        while ($row = $res->fetch()) {
            $value = unserialize($row["value"]);
            if ($row["is_entity"]) {
                $value = $index->node($value);
            }
            $props[$row["key"]] = $value;
        }
        return $props;
    }

    // INIT

    public function init_database_schema() {
        $schema = new Schema\Schema();

        $entity_table = $schema->createTable("entities");
        $entity_table->addColumn
            ("id", "integer"
            , ["notnull" => true, "unsigned" => true]
            );
        $entity_table->addColumn
            ( "type", "string"
            , ["notnull" => true]
            );
        $entity_table->setPrimaryKey(["id"]);

        $property_table = $schema->createTable("properties");
        $property_table->addColumn
            ("entity_id", "integer"
            , ["notnull" => true, "unsigned" => true]
            );
        $property_table->addColumn
            ( "key", "string"
            , ["notnull" => true]
            );
        $property_table->addColumn
            ( "is_entity", "boolean"
            , ["notnull" => true]
            );
        $property_table->addColumn
            ( "value", "string"
            , ["notnull" => true]
            );
        $property_table->addForeignKeyConstraint
            ( $entity_table
            , array("entity_id")
            , array("id")
            );
        $property_table->setPrimaryKey(["entity_id", "key"]);

        $relation_table = $schema->createTable("relations");
        $relation_table->addColumn
            ( "source_id", "integer"
            , ["notnull" => true, "unsigned" => true]
            );
        $relation_table->addColumn
            ( "entity_id", "integer"
            , ["notnull" => true, "unsigned" => true]
            );
        $relation_table->addColumn
            ( "target_id", "integer"
            , ["notnull" => true, "unsigned" => true]
            );
        $relation_table->addForeignKeyConstraint
            ( $entity_table
            , array("source_id")
            , array("id")
            );
        $relation_table->addForeignKeyConstraint
            ( $entity_table
            , array("entity_id")
            , array("id")
            );
        $relation_table->addForeignKeyConstraint
            ( $entity_table
            , array("target_id")
            , array("id")
            );
        $relation_table->setPrimaryKey(["entity_id"]);

        $sync = new SingleDatabaseSynchronizer($this->connection);
        $sync->createSchema($schema);
    }
}


1		<?php
2		/******************************************************************************
3		* An implementation of dicto (scg.unibe.ch/dicto) in and for PHP.
4		*
5		* Copyright (c) 2016, 2015 Richard Klees <[email protected]>
6		*
7		* This software is licensed under The MIT License. You should have received
8		* a copy of the license along with the code.
9		*/
10
11		namespace Lechimp\Dicto\App;
12
13		use Lechimp\Dicto\Graph;
14		use Doctrine\DBAL\Schema;
15		use Doctrine\DBAL\Types\Type;
16		use Doctrine\DBAL\Schema\Synchronizer\SingleDatabaseSynchronizer;
17		use Doctrine\DBAL\Statement;
18
19		class IndexDB extends DB {
20		/**
21		* Write the index to the database.
22		*
23		* @param Graph\IndexDB $index
24		* @return null
25		*/
26	1	public function write_index(Graph\IndexDB $index) {
27	1	$this->prepare_insert_statements();
28	1	$max_id = $this->serialize_nodes($index);
29	1	$this->serialize_relations($index, $max_id);
30	1	}
31
32		/**
33		* Read the index from the database.
34		*
35		* @return Graph\IndexDB $index
36		*/
37	1	public function read_index() {
38	1	$index = $this->build_graph_index_db();
39	1	$this->deserialize_nodes_to($index);
40	1	$this->deserialize_relations_to($index);
41	1	return $index;
42		}
43
44		protected function build_graph_index_db() {
45		return new Graph\IndexDB();
46		}
47
48		// WRITE
49
50	1	protected function serialize_nodes(Graph\IndexDB $index) {
51	1	$max_id = 0;
52	1	foreach ($index->nodes() as $node) {
53	1	$id = $node->id();
54	1	$this->insert_entity_stmt->execute([$node->id(), $node->type()]);
55	1	$max_id = max($max_id, $id);
56	1	$this->insert_properties($id, $node);
57	1	}
58	1	return $max_id;
59		}
60
61	1	protected function serialize_relations(Graph\IndexDB $index, $id) {
62	1	foreach ($index->nodes() as $node) {
63	1	foreach ($node->relations() as $relation) {
64	1	$id++;
65	1	$this->insert_entity_stmt->execute([$id, $relation->type()]);
66	1	$this->insert_properties($id, $relation);
67	1	$this->insert_relation_stmt->execute([$node->id(), $id, $relation->target()->id()]);
68	1	}
69	1	}
70	1	}
71
72		protected $insert_entity_stmt;
73		protected $insert_property_stmt;
74		protected $insert_relation_stmt;
75
76	1	protected function prepare_insert_statements() {
77	1	$this->insert_entity_stmt = $this->connection->prepare
78	1	( "INSERT INTO entities (id, type)\n"
79		. "VALUES (?, ?)"
80	1	);
81	1	$this->insert_property_stmt = $this->connection->prepare
82	1	( "INSERT INTO properties (entity_id, key, is_entity, value)\n"
83		. "VALUES (?, ?, ?, ?)"
84	1	);
85	1	$this->insert_relation_stmt = $this->connection->prepare
86	1	( "INSERT INTO relations (source_id, entity_id, target_id)\n"
87		. "VALUES (?, ?, ?)"
88	1	);
89	1	}
90
91	1	protected function insert_properties($id, Graph\Entity $e) {
92	1	foreach ($e->properties() as $key => $value) {
93	1	$this->insert_property($id, $key, $value);
94	1	}
95	1	}
96
97	1	protected function insert_property($entity_id, $key, $value) {
98	1	$is_entity = false;
99	1	if ($value instanceof Graph\Node) {
100	1	$is_entity = true;
101	1	$value = $value->id();
102	1	}
103	1	if ($value instanceof Graph\Relation) {
104		throw new \LogicException("Can't serialize Relation properties (NYI!)");
105		}
106	1	$value = serialize($value);
107	1	$this->insert_property_stmt->execute([$entity_id, $key, $is_entity, $value]);
108	1	}
109
110		// READ
111
112	1	protected function deserialize_nodes_to(Graph\IndexDB $index) {
113	1	$res = $this->connection->executeQuery
114	1	( "SELECT entities.id, entities.type FROM entities\n"
115		. "LEFT JOIN relations ON entities.id = relations.entity_id\n"
116	1	. "WHERE relations.source_id IS NULL"
117	1	);
118	1	while ($row = $res->fetch()) {
119	1	$properties = $this->select_properties($row["id"], $index);
120	1	$node = $index->create_node($row["type"], $properties);
		0 ignored issues – show Unused Code introduced 2016-10-02 11:58 UTC by Report Bug Copy Issue Report `$node` is not used, you could remove the assignment. This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently. $myVar = 'Value'; $higher = false; if (rand(1, 6) > 3) { $higher = true; } else { $higher = false; } Both the `$myVar` assignment in line 1 and the `$higher` assignment in line 2 are dead. The first because `$myVar` is never used and the second because `$higher` is always overwritten for every possible time line. Loading history...
121	1	assert('$row["id"] == $node->id()');
122	1	}
123	1	}
124
125	1	protected function deserialize_relations_to(Graph\IndexDB $index) {
126	1	$res = $this->connection->executeQuery
127	1	( "SELECT source_id, entity_id, target_id, type FROM relations\n"
128		. "JOIN entities ON entities.id = relations.entity_id\n"
129	1	. "ORDER BY source_id, entity_id"
130	1	);
131	1	$node = null;
132	1	while ($row = $res->fetch()) {
133	1	if ($node === null \|\| $node->id() != $row["source_id"]) {
134	1	$node = $index->node((int)$row["source_id"]);
135	1	}
136	1	$other = $index->node((int)$row["target_id"]);
137	1	$properties = $this->select_properties($row["entity_id"], $index);
138	1	$node->add_relation($row["type"], $properties, $other);
139	1	}
140	1	}
141
142
143	1	protected function select_properties($id, $index) {
144	1	$id = (int)$id;
145	1	$res = $this->connection->executeQuery
146	1	( "SELECT key, is_entity, value FROM properties\n"
147	1	. "WHERE entity_id = $id"
148	1	);
149	1	$props = [];
150	1	while ($row = $res->fetch()) {
151	1	$value = unserialize($row["value"]);
152	1	if ($row["is_entity"]) {
153	1	$value = $index->node($value);
154	1	}
155	1	$props[$row["key"]] = $value;
156	1	}
157	1	return $props;
158		}
159
160		// INIT
161
162	1	public function init_database_schema() {
163	1	$schema = new Schema\Schema();
164
165	1	$entity_table = $schema->createTable("entities");
166	1	$entity_table->addColumn
167	1	("id", "integer"
168	1	, ["notnull" => true, "unsigned" => true]
169	1	);
170	1	$entity_table->addColumn
171	1	( "type", "string"
172	1	, ["notnull" => true]
173	1	);
174	1	$entity_table->setPrimaryKey(["id"]);
175
176	1	$property_table = $schema->createTable("properties");
177	1	$property_table->addColumn
178	1	("entity_id", "integer"
179	1	, ["notnull" => true, "unsigned" => true]
180	1	);
181	1	$property_table->addColumn
182	1	( "key", "string"
183	1	, ["notnull" => true]
184	1	);
185	1	$property_table->addColumn
186	1	( "is_entity", "boolean"
187	1	, ["notnull" => true]
188	1	);
189	1	$property_table->addColumn
190	1	( "value", "string"
191	1	, ["notnull" => true]
192	1	);
193	1	$property_table->addForeignKeyConstraint
194	1	( $entity_table
195	1	, array("entity_id")
196	1	, array("id")
197	1	);
198	1	$property_table->setPrimaryKey(["entity_id", "key"]);
199
200	1	$relation_table = $schema->createTable("relations");
201	1	$relation_table->addColumn
202	1	( "source_id", "integer"
203	1	, ["notnull" => true, "unsigned" => true]
204	1	);
205	1	$relation_table->addColumn
206	1	( "entity_id", "integer"
207	1	, ["notnull" => true, "unsigned" => true]
208	1	);
209	1	$relation_table->addColumn
210	1	( "target_id", "integer"
211	1	, ["notnull" => true, "unsigned" => true]
212	1	);
213	1	$relation_table->addForeignKeyConstraint
214	1	( $entity_table
215	1	, array("source_id")
216	1	, array("id")
217	1	);
218	1	$relation_table->addForeignKeyConstraint
219	1	( $entity_table
220	1	, array("entity_id")
221	1	, array("id")
222	1	);
223	1	$relation_table->addForeignKeyConstraint
224	1	( $entity_table
225	1	, array("target_id")
226	1	, array("id")
227	1	);
228	1	$relation_table->setPrimaryKey(["entity_id"]);
229
230	1	$sync = new SingleDatabaseSynchronizer($this->connection);
231	1	$sync->createSchema($schema);
232	1	}
233		}
234

lechimp-p / dicto.php

Push — master ( addc16...69f641 )

IndexDB::init_method_table() B

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