<?php

namespace Illuminate\View\Compilers\Concerns;

trait CompilesConditionals
{
    /**
     * Compile the has-section statements into valid PHP.
     *
     * @param  string  $expression
     * @return string
     */
    protected function compileHasSection($expression)
    {
        return "<?php if (! empty(trim(\$__env->yieldContent{$expression}))): ?>";
    }

    /**
     * Compile the if statements into valid PHP.
     *
     * @param  string  $expression
     * @return string
     */
    protected function compileIf($expression)
    {
        return "<?php if{$expression}: ?>";
    }

    /**
     * Compile the unless statements into valid PHP.
     *
     * @param  string  $expression
     * @return string
     */
    protected function compileUnless($expression)
    {
        return "<?php if (! {$expression}): ?>";
    }

    /**
     * Compile the else-if statements into valid PHP.
     *
     * @param  string  $expression
     * @return string
     */
    protected function compileElseif($expression)
    {
        return "<?php elseif{$expression}: ?>";
    }

    /**
     * Compile the else statements into valid PHP.
     *
     * @return string
     */
    protected function compileElse()
    {
        return '<?php else: ?>';
    }

    /**
     * Compile the end-if statements into valid PHP.
     *
     * @return string
     */
    protected function compileEndif()
    {
        return '<?php endif; ?>';
    }

    /**
     * Compile the end-unless statements into valid PHP.
     *
     * @return string
     */
    protected function compileEndunless()
    {
        return '<?php endif; ?>';
    }

    /**
     * Compile the if-isset statements into valid PHP.
     *
     * @param  string  $expression
     * @return string
     */
    protected function compileIsset($expression)
    {
        return "<?php if(isset{$expression}): ?>";
    }

    /**
     * Compile the end-isset statements into valid PHP.
     *
     * @return string
     */
    protected function compileEndIsset()
    {
        return '<?php endif; ?>';
    }
}