refactor: adjust code structure

1 files changed, 165 insertions, 0 deletions

diff --git a/src/core/form_handler.cc b/src/core/form_handler.cc
new file mode 100644
index 0000000..2d018c9
--- /dev/null
+++ b/src/core/form_handler.cc
@@ -0,0 +1,165 @@
+/*
+ * Ricochet - A minimalist CLI web browser for fast, distraction-free navigation.
+ * Copyright (C) 2026  Richard Qin
+ *
+ * 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 3 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "ricochet/core/form_handler.hh"
+#include "ricochet/core/ui_input.hh"
+#include "ricochet/core/utils.hh"
+
+namespace ricochet::core {
+
+InputAction submit_form( const render::InputField& target_input,
+                         const std::vector<render::InputField>& inputs,
+                         const std::string& current_url,
+                         std::vector<HttpRequest>& history,
+                         std::size_t& history_idx )
+{
+  std::string body;
+  for ( const auto& in : inputs ) {
+    if ( in.action == target_input.action && !in.name.empty() && in.type != "submit" && in.type != "button" ) {
+      if ( ( in.type == "checkbox" || in.type == "radio" ) && !in.checked ) {
+        continue;
+      }
+      std::string encoded = in.value;
+      for ( char& ch : encoded ) {
+        if ( ch == ' ' ) {
+          ch = '+';
+        }
+      }
+      if ( !body.empty() ) {
+        body += "&";
+      }
+      body += in.name + "=" + encoded;
+    }
+  }
+  const std::string action
+    = target_input.action.empty() ? current_url : normalize_url( target_input.action, current_url );
+  HttpRequest next_req { .url = action, .method = "GET", .body = "" };
+  if ( target_input.method == "post" || target_input.method == "POST" ) {
+    next_req.method = "POST";
+    next_req.body = body;
+  } else {
+    const char sep = action.contains( '?' ) ? '&' : '?';
+    next_req.url += sep + body;
+  }
+  history.resize( history_idx + 1 );
+  history.push_back( next_req );
+  history_idx++;
+  return InputAction::Navigate;
+}
+
+void update_input_value( PageData& page_data, std::size_t index, const std::string& query )
+{
+  page_data.inputs[index - 1].value = query;
+  const std::string marker = "[I" + std::to_string( index ) + ":";
+  const std::string replacement = "[I" + std::to_string( index ) + ":" + query + "]";
+
+  auto update_lines = [&]( std::vector<std::string>& lines_arr ) {
+    for ( auto& line : lines_arr ) {
+      const std::size_t pos = line.find( marker );
+      if ( pos != std::string::npos ) {
+        const std::size_t end = line.find( ']', pos );
+        if ( end != std::string::npos ) {
+          line.replace( pos, end - pos + 1, replacement );
+        }
+      }
+    }
+  };
+  update_lines( page_data.lines );
+  update_lines( page_data.original_lines );
+}
+
+void update_single_line_ui( std::string& line, const std::string& marker, const render::InputField& in )
+{
+  const std::string checked_str = marker + ( in.type == "checkbox" ? "[X] " : "(X) " ) + in.value + "]";
+  const std::string unchecked_str = marker + ( in.type == "checkbox" ? "[ ] " : "( ) " ) + in.value + "]";
+
+  const std::string& target_str = in.checked ? checked_str : unchecked_str;
+  const std::string& old_str = in.checked ? unchecked_str : checked_str;
+
+  const std::size_t pos = line.find( old_str );
+  if ( pos != std::string::npos ) {
+    line.replace( pos, old_str.length(), target_str );
+  }
+}
+
+void update_toggle_ui( PageData& page_data )
+{
+  for ( std::size_t i = 0; i < page_data.inputs.size(); ++i ) {
+    const auto& in = page_data.inputs[i];
+    if ( in.type != "checkbox" && in.type != "radio" ) {
+      continue;
+    }
+    const std::string marker = "[I" + std::to_string( i + 1 ) + ":";
+    for ( auto& line : page_data.lines ) {
+      update_single_line_ui( line, marker, in );
+    }
+    for ( auto& line : page_data.original_lines ) {
+      update_single_line_ui( line, marker, in );
+    }
+  }
+}
+
+InputAction handle_form_input( const tui::Terminal& terminal,
+                               PageData& page_data,
+                               const std::string& current_url,
+                               std::vector<HttpRequest>& history,
+                               std::size_t& history_idx )
+{
+  const std::string num_input = get_terminal_input( terminal, "Select Input [#]:" );
+  if ( num_input.empty() ) {
+    return InputAction::None;
+  }
+  std::size_t index = 0;
+  try {
+    index = std::stoul( num_input );
+  } catch ( ... ) {
+    return InputAction::None;
+  }
+  if ( index == 0 || index > page_data.inputs.size() ) {
+    return InputAction::None;
+  }
+
+  auto& target_input = page_data.inputs[index - 1];
+  if ( target_input.type == "submit" || target_input.type == "button" ) {
+    return submit_form( target_input, page_data.inputs, current_url, history, history_idx );
+  }
+
+  if ( target_input.type == "checkbox" || target_input.type == "radio" ) {
+    if ( target_input.type == "radio" ) {
+      for ( auto& in : page_data.inputs ) {
+        if ( in.name == target_input.name && in.action == target_input.action ) {
+          in.checked = false;
+        }
+      }
+      target_input.checked = true;
+    } else {
+      target_input.checked = !target_input.checked;
+    }
+    update_toggle_ui( page_data );
+    return InputAction::None;
+  }
+
+  const std::string query = get_terminal_input( terminal, "Enter Text [I" + std::to_string( index ) + "]:" );
+  if ( query.empty() ) {
+    return InputAction::None;
+  }
+  update_input_value( page_data, index, query );
+  return InputAction::None;
+}
+
+} // namespace ricochet::core