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<?php namespace Arcanedev\LaravelMetrics\Expressions\TrendDateFormat; |
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use Arcanedev\LaravelMetrics\Exceptions\InvalidTrendUnitException; |
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use Arcanedev\LaravelMetrics\Metrics\Trend; |
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/** |
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* Class PostgresExpression |
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* |
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* @package Arcanedev\LaravelMetrics\Expressions\TrendDateFormat |
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* @author ARCANEDEV <[email protected]> |
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*/ |
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class PostgresExpression extends Expression |
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{ |
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/* ----------------------------------------------------------------- |
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| Main Methods |
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| ----------------------------------------------------------------- |
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*/ |
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/** |
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* Get the value of the expression. |
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* |
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* @return mixed |
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*/ |
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public function getValue() |
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{ |
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$interval = $this->interval(); |
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switch ($this->unit) { |
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case Trend::BY_MONTHS: |
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return "to_char({$this->wrap($this->value)}{$interval}, 'YYYY-MM')"; |
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case Trend::BY_WEEKS: |
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return "to_char({$this->wrap($this->value)}{$interval}, 'IYYY-IW')"; |
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case Trend::BY_DAYS: |
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return "to_char({$this->wrap($this->value)}{$interval}, 'YYYY-MM-DD')"; |
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case Trend::BY_HOURS: |
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return "to_char({$this->wrap($this->value)}{$interval}, 'YYYY-MM-DD HH24:00')"; |
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case Trend::BY_MINUTES: |
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return "to_char({$this->wrap($this->value)}{$interval}, 'YYYY-MM-DD HH24:mi:00')"; |
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default: |
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throw InvalidTrendUnitException::make($this->unit); |
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} |
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} |
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/* ----------------------------------------------------------------- |
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| Other Methods |
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| ----------------------------------------------------------------- |
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*/ |
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/** |
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* Get the interval. |
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* |
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* @return string |
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*/ |
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private function interval(): string |
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{ |
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$offset = $this->offset(); |
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if ($offset > 0) |
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return ' + interval \''.$offset.' hour\''; |
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elseif ($offset === 0) |
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return ''; |
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return ' - interval \''.($offset * -1).' HOUR\''; |
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} |
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} |
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ARCANEDEV /
LaravelMetrics
