*** Backup Mirror *** The web interface and JSON api for the ConnectedHumber Air Quality Monitoring Project. https://github.com/ConnectedHumber/Air-Quality-Web
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Air-Quality-Web/logic/Repositories/MariaDBMeasurementDataRepos...

96 lines
3.7 KiB

<?php
namespace AirQuality\Repositories;
use \AirQuality\Database;
use \SBRL\TomlConfig;
/**
* Fetches measurement readings from a MariaDB database.
*/
class MariaDBMeasurementDataRepository implements IMeasurementDataRepository {
public static $table_name_metadata = "readings";
public static $table_name_values = "reading_values";
public static $column_values_id = "id";
public static $column_values_reading_id = "reading_id";
public static $column_values_value = "value";
public static $column_values_reading_type = "reading_value_types_id";
public static $column_metadata_id = "id";
public static $column_metadata_storedon = "storedon";
public static $column_metadata_recordedon = "recordedon";
public static $column_metadata_device_id = "device_id";
public static $column_metadata_lat = "reading_latitude";
public static $column_metadata_long = "reading_longitude";
// ------------------------------------------------------------------------
/** @var TomlConfig */
private $settings;
/**
* The database connection.
* @var Database
*/
private $database;
/** Function that gets a static variable by it's name. Useful in preparing SQL queries. */
private $get_static;
private $get_static_extra;
function __construct(Database $in_database, TomlConfig $in_settings) {
$this->database = $in_database;
$this->settings = $in_settings;
$this->get_static = function($name) { return self::$$name; };
$this->get_static_extra = function($class_name, $name) {
return $class_name::$$name;
};
}
public function get_readings_by_date(\DateTime $datetime, string $reading_type) {
$s = $this->get_static;
$o = $this->get_static_extra;
return $this->database->query(
"SELECT
{$s("table_name_values")}.{$s("column_values_value")},
{$s("table_name_values")}.{$s("column_values_reading_id")},
{$s("table_name_metadata")}.{$s("column_metadata_device_id")},
COALESCE(
{$s("table_name_metadata")}.{$s("column_metadata_recordedon")},
{$s("table_name_metadata")}.{$s("column_metadata_storedon")}
) AS datetime,
COALESCE(
{$s("table_name_metadata")}.{$s("column_metadata_lat")},
{$o(MariaDBDeviceRepository::class, "table_name")}.{$o(MariaDBDeviceRepository::class, "column_lat")}
) AS latitude,
COALESCE(
{$s("table_name_metadata")}.{$s("column_metadata_long")},
{$o(MariaDBDeviceRepository::class, "table_name")}.{$o(MariaDBDeviceRepository::class, "column_long")}
) AS longitude,
COUNT({$s("table_name_metadata")}.{$s("column_metadata_device_id")}) AS record_count
FROM {$s("table_name_values")}
JOIN {$s("table_name_metadata")} ON {$s("table_name_values")}.{$s("column_values_reading_id")} = {$s("table_name_metadata")}.id
JOIN {$o(MariaDBDeviceRepository::class, "table_name")} ON {$s("table_name_metadata")}.{$s("column_metadata_device_id")} = {$o(MariaDBDeviceRepository::class, "table_name")}.{$o(MariaDBDeviceRepository::class, "column_device_id")}
WHERE ABS(TIME_TO_SEC(TIMEDIFF(
:datetime,
COALESCE(
{$s("table_name_metadata")}.{$s("column_metadata_recordedon")},
{$s("table_name_metadata")}.{$s("column_metadata_storedon")}
)
))) < :max_reading_timediff
AND
{$s("table_name_values")}.{$s("column_values_reading_type")} = :reading_type
GROUP BY {$s("table_name_metadata")}.{$s("column_metadata_device_id")}
ORDER BY {$s("table_name_metadata")}.{$s("column_metadata_recordedon")}
", [
// The database likes strings, not PHP DateTime() instances
"datetime" => $datetime->format(\DateTime::ISO8601),
"reading_type" => $reading_type,
"max_reading_timediff" => $this->settings->get("data.max_reading_timediff")
]
)->fetchAll();
}
}