Add websockets surface module

1 files changed, 95 insertions, 0 deletions

diff --git a/libs/surfaces/websockets/state.h b/libs/surfaces/websockets/state.h
new file mode 100644
index 0000000000..814eb3ccd4
--- /dev/null
+++ b/libs/surfaces/websockets/state.h
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2020 Luciano Iam <lucianito@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef node_state_h
+#define node_state_h
+
+#include <vector>
+#include <cmath>
+#include <cstring>
+
+#include "typed_value.h"
+
+namespace Node {
+    const std::string tempo                     = "tempo";
+    const std::string strip_desc                = "strip_desc";
+    const std::string strip_meter               = "strip_meter";
+    const std::string strip_gain                = "strip_gain";
+    const std::string strip_pan                 = "strip_pan";
+    const std::string strip_mute                = "strip_mute";
+    const std::string strip_plugin_desc         = "strip_plugin_desc";
+    const std::string strip_plugin_enable       = "strip_plugin_enable";
+    const std::string strip_plugin_param_desc   = "strip_plugin_param_desc";
+    const std::string strip_plugin_param_value  = "strip_plugin_param_value";
+};
+
+class NodeState {
+
+  public:
+
+    NodeState ();
+    NodeState (std::string);
+    NodeState (std::string, std::initializer_list<uint32_t>,
+        std::initializer_list<TypedValue> = {});
+
+    std::string debug_str () const;
+
+    std::string node () const { return _node; }
+
+    int n_addr () const;
+    uint32_t nth_addr (int) const;
+    void add_addr (uint32_t);
+
+    int n_val () const;
+    TypedValue nth_val (int) const;
+    void add_val (TypedValue);
+
+  private:
+
+    std::string _node;
+    std::vector<uint32_t> _addr;
+    std::vector<TypedValue> _val;
+    std::string _node_addr_hash;
+
+    void update_node_addr_hash ();
+
+    friend struct std::hash<NodeState>;
+    friend struct std::equal_to<NodeState>;
+
+};
+
+namespace std {
+    template <>
+    struct hash<NodeState> {
+        size_t operator () (const NodeState &state) const {
+            // std::hash<const char*> produces a hash of the value of the
+            // pointer (the memory address), it does not examine the contents
+            // of any character array.
+            return std::hash<std::string>()(state._node_addr_hash);
+        }
+    };
+
+    template<>
+    struct equal_to<NodeState> {
+        bool operator() (const NodeState& lhs, const NodeState& rhs) const {
+            return lhs._node_addr_hash == rhs._node_addr_hash;
+        }
+    };
+}
+
+#endif // node_state_h