MXS-2481 Rename MaxCtrl to MaxRest

So as not to believe that the program depends upon or uses
maxctrl.

maxscale-system-test/maxrest.cc

@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2016 MariaDB Corporation Ab
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file and at www.mariadb.com/bsl11.
+ *
+ * Change Date: 2022-01-01
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2 or later of the General
+ * Public License.
+ */
+
+#include "maxrest.hh"
+
+using namespace std;
+
+MaxRest::Server::Server(const MaxRest& maxrest, json_t* pObject)
+    : name       (maxrest.get<string> (pObject, "id", Presence::MANDATORY))
+    , address    (maxrest.get<string> (pObject, "attributes/parameters/address"))
+    , port       (maxrest.get<int64_t>(pObject, "attributes/parameters/port"))
+    , connections(maxrest.get<int64_t>(pObject, "attributes/statistics/connections"))
+    , state      (maxrest.get<string> (pObject, "attributes/state"))
+{
+}
+
+MaxRest::MaxRest(TestConnections* pTest)
+    : m_test(*pTest)
+{
+}
+
+unique_ptr<json_t> MaxRest::servers() const
+{
+    return curl("servers");
+}
+
+vector<MaxRest::Server> MaxRest::list_servers() const
+{
+    return get_array<Server>(servers().get(), "data", Presence::MANDATORY);
+}
+
+json_t* MaxRest::get_object(json_t* pObject, const string& key, Presence presence) const
+{
+    json_t* pValue = json_object_get(pObject, key.c_str());
+
+    if (!pValue && (presence == Presence::MANDATORY))
+    {
+        raise("Mandatory key '" + key + "' not present.");
+    }
+
+    return pValue;
+}
+
+json_t* MaxRest::get_leaf_object(json_t* pObject, const string& key, Presence presence) const
+{
+    auto i = key.find("/");
+
+    if (i == string::npos)
+    {
+        pObject = get_object(pObject, key, presence);
+    }
+    else
+    {
+        string head = key.substr(0, i);
+        string tail = key.substr(i + 1);
+
+        pObject = get_object(pObject, head, Presence::MANDATORY);
+        pObject = get_leaf_object(pObject, tail, presence);
+    }
+
+    return pObject;
+}
+
+unique_ptr<json_t> MaxRest::parse(const string& json) const
+{
+    json_error_t error;
+    unique_ptr<json_t> sRoot(json_loads(json.c_str(), 0, &error));
+
+    if (!sRoot)
+    {
+        raise("JSON parsing failed: " + string(error.text));
+    }
+
+    return sRoot;
+}
+
+unique_ptr<json_t> MaxRest::curl(const string& path) const
+{
+    string url = "http://127.0.0.1:8989/v1/" + path;
+    string command = "curl -u admin:mariadb " + url;
+
+    auto result = m_test.maxscales->ssh_output(command.c_str(), 0, false);
+
+    if (result.first != 0)
+    {
+        raise("Invocation of curl failed: " + to_string(result.first));
+    }
+
+    return parse(result.second);
+}
+
+void MaxRest::raise(const std::string& message) const
+{
+    ++m_test.global_result;
+    throw runtime_error(message);
+}
+
+template<>
+string MaxRest::get<string>(json_t* pObject, const string& key, Presence presence) const
+{
+    json_t* pValue = get_leaf_object(pObject, key, presence);
+
+    if (pValue && !json_is_string(pValue))
+    {
+        raise("Key '" + key + "' is present, but value is not a string.");
+    }
+
+    return pValue ? json_string_value(pValue) : "";
+}
+
+template<>
+int64_t MaxRest::get<int64_t>(json_t* pObject, const string& key, Presence presence) const
+{
+    json_t* pValue = get_leaf_object(pObject, key, presence);
+
+    if (pValue && !json_is_integer(pValue))
+    {
+        raise("Key '" + key + "' is present, but value is not an integer.");
+    }
+
+    return pValue ? json_integer_value(pValue) : 0;
+}