67 lines
3.1 KiB
PHP
67 lines
3.1 KiB
PHP
<?php declare(strict_types=1);
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namespace BitBadger\PDODocument\Query;
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use BitBadger\PDODocument\{Configuration, DocumentException, Field, Mode, Query};
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/**
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* Queries to remove fields from documents
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*
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* _NOTE: When using these queries to build custom functions, be aware that different databases use significantly
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* different syntax. The `$parameters` passed to these functions should be run through `Parameters::fieldNames`
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* function to generate them appropriately for the database currently being targeted._
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*/
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class RemoveFields
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{
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/**
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* Create an UPDATE statement to remove fields from a JSON document
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*
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* @param string $tableName The name of the table in which documents should be manipulated
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* @param array $parameters The parameter list for the query
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* @param string $whereClause The body of the WHERE clause for the update
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* @return string The UPDATE statement to remove fields from a JSON document
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* @throws DocumentException If the database mode has not been set
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*/
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public static function update(string $tableName, array $parameters, string $whereClause): string
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{
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switch (Configuration::$mode) {
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case Mode::PgSQL:
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return "UPDATE $tableName SET data = data - " . array_keys($parameters)[0] . " WHERE $whereClause";
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case Mode::SQLite:
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$paramNames = implode(', ', array_keys($parameters));
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return "UPDATE $tableName SET data = json_remove(data, $paramNames) WHERE $whereClause";
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default:
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throw new DocumentException('Database mode not set; cannot generate field removal query');
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}
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}
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/**
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* Query to remove fields from a document by the document's ID
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*
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* @param string $tableName The name of the table in which the document should be manipulated
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* @param array $parameters The parameter list for the query
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* @return string The UPDATE statement to remove fields from a document by its ID
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* @throws DocumentException If the database mode has not been set
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*/
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public static function byId(string $tableName, array $parameters): string
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{
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return self::update($tableName, $parameters, Query::whereById());
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}
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/**
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* Query to remove fields from documents via a comparison on JSON fields within the document
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*
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* @param string $tableName The name of the table in which documents should be manipulated
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* @param array|Field[] $fields The field comparison to match
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* @param array $parameters The parameter list for the query
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* @param string $conjunction How to handle multiple conditions (optional; defaults to `AND`)
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* @return string The UPDATE statement to remove fields from documents via field comparison
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* @throws DocumentException If the database mode has not been set
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*/
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public static function byFields(string $tableName, array $fields, array $parameters,
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string $conjunction = 'AND'): string
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{
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return self::update($tableName, $parameters, Query::whereByFields($fields, $conjunction));
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}
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}
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