add mstch

5 files changed, 119 insertions, 0 deletions

diff --git a/lib/mstch/src/state/in_section.cpp b/lib/mstch/src/state/in_section.cpp
new file mode 100644
index 0000000..a139913
--- /dev/null
+++ b/lib/mstch/src/state/in_section.cpp
@@ -0,0 +1,34 @@
+#include "in_section.hpp"
+#include "outside_section.hpp"
+#include "visitor/is_node_empty.hpp"
+#include "visitor/render_section.hpp"
+
+using namespace mstch;
+
+in_section::in_section(type type, const token& start_token):
+    m_type(type), m_start_token(start_token), m_skipped_openings(0)
+{
+}
+
+std::string in_section::render(render_context& ctx, const token& token) {
+  if (token.token_type() == token::type::section_close)
+    if (token.name() == m_start_token.name() && m_skipped_openings == 0) {
+      auto& node = ctx.get_node(m_start_token.name());
+      std::string out;
+
+      if (m_type == type::normal && !visit(is_node_empty(), node))
+        out = visit(render_section(ctx, m_section, m_start_token.delims()), node);
+      else if (m_type == type::inverted && visit(is_node_empty(), node))
+        out = render_context::push(ctx).render(m_section);
+
+      ctx.set_state<outside_section>();
+      return out;
+    } else
+      m_skipped_openings--;
+  else if (token.token_type() == token::type::inverted_section_open ||
+      token.token_type() == token::type::section_open)
+    m_skipped_openings++;
+
+  m_section << token;
+  return "";
+}
diff --git a/lib/mstch/src/state/in_section.hpp b/lib/mstch/src/state/in_section.hpp
new file mode 100644
index 0000000..14ca2f7
--- /dev/null
+++ b/lib/mstch/src/state/in_section.hpp
@@ -0,0 +1,24 @@
+#pragma once
+
+#include <sstream>
+#include <vector>
+
+#include "render_state.hpp"
+#include "template_type.hpp"
+
+namespace mstch {
+
+class in_section: public render_state {
+ public:
+  enum class type { inverted, normal };
+  in_section(type type, const token& start_token);
+  std::string render(render_context& context, const token& token) override;
+
+ private:
+  const type m_type;
+  const token& m_start_token;
+  template_type m_section;
+  int m_skipped_openings;
+};
+
+}
diff --git a/lib/mstch/src/state/outside_section.cpp b/lib/mstch/src/state/outside_section.cpp
new file mode 100644
index 0000000..c9817b1
--- /dev/null
+++ b/lib/mstch/src/state/outside_section.cpp
@@ -0,0 +1,32 @@
+#include "outside_section.hpp"
+
+#include "visitor/render_node.hpp"
+#include "in_section.hpp"
+#include "render_context.hpp"
+
+using namespace mstch;
+
+std::string outside_section::render(
+    render_context& ctx, const token& token)
+{
+  using flag = render_node::flag;
+  switch (token.token_type()) {
+    case token::type::section_open:
+      ctx.set_state<in_section>(in_section::type::normal, token);
+      break;
+    case token::type::inverted_section_open:
+      ctx.set_state<in_section>(in_section::type::inverted, token);
+      break;
+    case token::type::variable:
+      return visit(render_node(ctx, flag::escape_html), ctx.get_node(token.name()));
+    case token::type::unescaped_variable:
+      return visit(render_node(ctx, flag::none), ctx.get_node(token.name()));
+    case token::type::text:
+      return token.raw();
+    case token::type::partial:
+      return ctx.render_partial(token.name(), token.partial_prefix());
+    default:
+      break;
+  }
+  return "";
+}
diff --git a/lib/mstch/src/state/outside_section.hpp b/lib/mstch/src/state/outside_section.hpp
new file mode 100644
index 0000000..8617dce
--- /dev/null
+++ b/lib/mstch/src/state/outside_section.hpp
@@ -0,0 +1,12 @@
+#pragma once
+
+#include "render_state.hpp"
+
+namespace mstch {
+
+class outside_section: public render_state {
+ public:
+  std::string render(render_context& context, const token& token) override;
+};
+
+}
diff --git a/lib/mstch/src/state/render_state.hpp b/lib/mstch/src/state/render_state.hpp
new file mode 100644
index 0000000..e44a956
--- /dev/null
+++ b/lib/mstch/src/state/render_state.hpp
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <memory>
+
+#include "token.hpp"
+
+namespace mstch {
+
+class render_context;
+
+class render_state {
+ public:
+  virtual ~render_state() {}
+  virtual std::string render(render_context& context, const token& token) = 0;
+};
+
+}