1 files changed, 97 insertions, 0 deletions
diff --git a/src/rttt/view.hpp b/src/rttt/view.hpp
new file mode 100644
index 0000000..3228cd3
--- /dev/null
+++ b/src/rttt/view.hpp
@@ -0,0 +1,97 @@
+#pragma once
+
+#include "nlohmann/json.hpp"
+
+#include "storage.hpp"
+
+namespace rttt {
+namespace view {
+
+enum class layout : int { base = 1, text = 2, numbering = 4, spacing = 8 };
+
+inline layout &operator|=(layout &a, layout b) {
+  return (layout &)((int &)a |= (int)b);
+}
+inline layout operator|(layout a, layout b) {
+  return (layout)((int)a | (int)b);
+}
+inline layout &operator^=(layout &a, layout b) {
+  return (layout &)((int &)a ^= (int)b);
+}
+inline layout operator^(layout a, layout b) {
+  return (layout)((int)a ^ (int)b);
+}
+inline layout operator&(layout a, layout b) {
+  return (layout)((int)a & (int)b);
+}
+inline layout operator&=(layout &a, layout b) {
+  return (layout &)((int &)a &= (int)b);
+}
+inline bool operator==(layout a, layout b) { return (int)(a & b) != 0; }
+inline bool operator!=(layout a, layout b) { return !(a == b); }
+
+struct item_state {
+  bool collapsed = false;
+  bool read = false;
+};
+
+void to_json(nlohmann::json &j, const item_state &s) {
+  j = nlohmann::json{{"collapsed", s.collapsed}, {"read", s.read}};
+}
+
+void from_json(const nlohmann::json &j, item_state &s) {
+  j.at("collapsed").get_to(s.collapsed);
+  j.at("read").get_to(s.read);
+}
+
+bool is_collapsed(const rttt::active_storage<std::string, item_state> &state,
+                  const std::string &id) {
+  if (state.contains(id))
+    return state.at(id).collapsed;
+  return false;
+}
+
+bool is_read(const rttt::active_storage<std::string, item_state> &state,
+             const std::string &id) {
+  if (state.contains(id))
+    return state.at(id).read;
+  return false;
+}
+
+rttt::active_storage<std::string, item_state>
+toggle_collapsed(rttt::active_storage<std::string, item_state> &&state,
+                 const std::string &id) {
+  if (state.contains(id)) {
+    auto &v = state.at(id);
+    v.collapsed = !v.collapsed;
+    if (v.read == false && v.collapsed == false)
+      state.erase(id);
+  } else {
+    state.insert({id, item_state{true, false}});
+  }
+  return state;
+}
+
+rttt::active_storage<std::string, item_state>
+toggle_read(rttt::active_storage<std::string, item_state> &&state,
+            const std::string &id) {
+  if (state.contains(id)) {
+    auto &v = state.at(id);
+    v.read = !v.read;
+    if (v.read == false && v.collapsed == false)
+      state.erase(id);
+  } else {
+    state.insert({id, item_state{false, true}});
+  }
+  return state;
+}
+
+rttt::active_storage<std::string, item_state>
+mark_read(rttt::active_storage<std::string, item_state> &&state,
+          const std::string &id) {
+  if (!is_read(state, id))
+    return toggle_read(std::move(state), id);
+  return std::move(state);
+}
+} // namespace view
+} // namespace rttt