Adds phonenumber lookup to API, refactoring

api/api_functions.php

@@ -0,0 +1,61 @@
+<?php
+set_include_path("../includes/");
+require_once("../includes/DB.php");
+require_once("../inside/credentials.php");
+
+
+/* Set HTTP response code */
+function set_response_code($code) {
+    if(!is_int($code)) {
+        return false;
+    }
+    header('X-Ignore-This: something', true, $code);
+}
+
+
+function is_valid_utf8($text) {
+    return mb_check_encoding($text, 'utf-8');
+}
+
+
+function get_db_connection($fetch_mode=NULL, $options=NULL) {
+    if($options == NULL) {
+        $options = array(
+            'debug'       => 2,
+            'portability' => DB_PORTABILITY_ALL,
+        );
+    }
+
+    $conn = DB::connect(getDSN(), $options);
+
+    if(DB :: isError($conn)) {
+        echo $conn->toString();
+    } else {
+        if($fetch_mode != NULL) {
+            $conn->setFetchMode($fetch_mode);
+        }
+    }
+
+    return $conn;
+}
+
+
+function clean_phonenumber($pn) {
+    $pn = preg_replace('/[^0-9\+]/', '', $pn); // remove everything except valid chars
+    $pn = preg_replace('/^00/','+', $pn); // replace starting 00 with +
+    // norwegian phone numbers
+    if( strlen($pn) === 8 && ($pn[0] === "4" || $pn[0] === "9") ) {
+        $pn = "+47".$pn;
+    }
+    // ...without +
+    if( strlen($pn) === 10 && $pn[0] === "4" && $pn[1] === "7" && ($pn[2] === "4" || $pn[2] === "9") ) {
+        $pn = "+".$pn;
+    }
+    return $pn;
+}
+
+
+// E.164
+function valid_phonenumber($phone) {
+    return preg_match('/^\+?\d{8,15}$/i', $phone);
+}