spaces.php

aws/JmesPath/Env.php

@@ -0,0 +1,66 @@
+<?php
+namespace JmesPath;
+
+/**
+ * Provides a simple environment based search.
+ *
+ * The runtime utilized by the Env class can be customized via environment
+ * variables. If the JP_PHP_COMPILE environment variable is specified, then the
+ * CompilerRuntime will be utilized. If set to "on", JMESPath expressions will
+ * be cached to the system's temp directory. Set the environment variable to
+ * a string to cache expressions to a specific directory.
+ */
+final class Env
+{
+    const COMPILE_DIR = 'JP_PHP_COMPILE';
+
+    /**
+     * Returns data from the input array that matches a JMESPath expression.
+     *
+     * @param string $expression JMESPath expression to evaluate
+     * @param mixed  $data       JSON-like data to search
+     *
+     * @return mixed|null Returns the matching data or null
+     */
+    public static function search($expression, $data)
+    {
+        static $runtime;
+        if (!$runtime) {
+            $runtime = Env::createRuntime();
+        }
+        return $runtime($expression, $data);
+    }
+
+    /**
+     * Creates a JMESPath runtime based on environment variables and extensions
+     * available on a system.
+     *
+     * @return callable
+     */
+    public static function createRuntime()
+    {
+        switch ($compileDir = getenv(self::COMPILE_DIR)) {
+            case false: return new AstRuntime();
+            case 'on': return new CompilerRuntime();
+            default: return new CompilerRuntime($compileDir);
+        }
+    }
+
+    /**
+     * Delete all previously compiled JMESPath files from the JP_COMPILE_DIR
+     * directory or sys_get_temp_dir().
+     *
+     * @return int Returns the number of deleted files.
+     */
+    public static function cleanCompileDir()
+    {
+        $total = 0;
+        $compileDir = getenv(self::COMPILE_DIR) ?: sys_get_temp_dir();
+        foreach (glob("{$compileDir}/jmespath_*.php") as $file) {
+            $total++;
+            unlink($file);
+        }
+
+        return $total;
+    }
+}