add JSON format to /status endpoint (#1013)

add JSON format to /status endpoint

lib/Status.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace Nominatim;
+
+use Exception;
+use PEAR;
+
+class Status
+{
+    protected $oDB;
+
+    public function __construct(&$oDB)
+    {
+        $this->oDB =& $oDB;
+    }
+
+    public function status()
+    {
+        if (!$this->oDB || PEAR::isError($this->oDB)) {
+            throw new Exception('No database', 700);
+        }
+
+        $sStandardWord = $this->oDB->getOne("SELECT make_standard_name('a')");
+        if (PEAR::isError($sStandardWord)) {
+            throw new Exception('Module failed', 701);
+        }
+
+        if ($sStandardWord != 'a') {
+            throw new Exception('Module call failed', 702);
+        }
+
+        $sSQL = 'SELECT word_id, word_token, word, class, type, country_code, ';
+        $sSQL .= "operator, search_name_count FROM word WHERE word_token IN (' a')";
+        $iWordID = $this->oDB->getOne($sSQL);
+        if (PEAR::isError($iWordID)) {
+            throw new Exception('Query failed', 703);
+        }
+        if (!$iWordID) {
+            throw new Exception('No value', 704);
+        }
+    }
+
+    public function dataDate()
+    {
+        $sSQL = 'SELECT EXTRACT(EPOCH FROM lastimportdate) FROM import_status LIMIT 1';
+        $iDataDateEpoch = $this->oDB->getOne($sSQL);
+
+        if (PEAR::isError($iDataDateEpoch)) {
+            throw Exception('Data date query failed '.$iDataDateEpoch->getMessage(), 705);
+        }
+
+        return $iDataDateEpoch;
+    }
+}