feat(GridFire): added weak electron screening

src/network/lib/io/network_file.cpp

@@ -1,3 +1,77 @@
-//
-// Created by Emily Boudreaux on 6/30/25.
-//
+#include "gridfire/io/network_file.h"
+
+#include <string>
+#include <vector>
+#include <algorithm>
+#include <fstream>
+#include <stdexcept>
+
+#include "quill/LogMacros.h"
+
+namespace gridfire::io {
+    namespace {
+        inline void ltrim(std::string &s) {
+           s.erase(
+               s.begin(),
+               std::ranges::find_if(s,
+                                    [](const unsigned char ch) {
+                                        return !std::isspace(ch);
+                                    })
+            );
+        }
+
+        inline void rtrim(std::string &s) {
+            s.erase(
+                std::find_if(
+                    s.rbegin(),
+                    s.rend(),
+                    [](const unsigned char ch) {
+                        return !std::isspace(ch);
+                    }).base(),
+                    s.end()
+                );
+        }
+
+        inline void trim(std::string &s) {
+            ltrim(s);
+            rtrim(s);
+        }
+
+
+    }
+    SimpleReactionListFileParser::SimpleReactionListFileParser() {}
+
+    ParsedNetworkData SimpleReactionListFileParser::parse(const std::string& filename) const {
+        LOG_TRACE_L1(m_logger, "Parsing simple reaction list file: {}", filename);
+
+        std::ifstream file(filename);
+        if (!file.is_open()) {
+            LOG_ERROR(m_logger, "Failed to open file: {}", filename);
+            m_logger -> flush_log();
+            throw std::runtime_error("Could not open file: " + filename);
+        }
+
+        ParsedNetworkData parsed;
+        std::string line;
+        int line_number = 0;
+        while (std::getline(file, line)) {
+            line_number++;
+            LOG_TRACE_L3(m_logger, "Parsing reaction list file {}, line {}: {}", filename, line_number, line);
+
+            const size_t comment_pos = line.find('#');
+            if (comment_pos != std::string::npos) {
+                line = line.substr(0, comment_pos);
+            }
+
+            trim(line);
+
+            if (line.empty()) {
+                continue; // Skip empty lines
+            }
+            parsed.reactionPENames.push_back(line);
+        }
+        LOG_TRACE_L1(m_logger, "Parsed {} reactions from file: {}", parsed.reactionPENames.size(), filename);
+        return parsed;
+    }
+
+}