Started earnest work on cli

1 files changed, 41 insertions, 0 deletions

diff --git a/src/settings.cc b/src/settings.cc
new file mode 100644
index 0000000..e9a6165
--- /dev/null
+++ b/src/settings.cc
@@ -0,0 +1,41 @@
+#include "settings.h"
+#include <map>
+#include <cstdlib>
+#include <regex>
+
+namespace settings {
+    const std::map<std::string, std::string> dummySettings {
+        {"weapon", "parser/items/weapons/"},
+            {"armor", "parser/items/armor/"},
+            {"spellcasting", "parser/spells/"},
+            {"savedir", "~/.dmtool/"}
+    };
+
+
+    // Update the input string.
+    // Obtained from https://stackoverflow.com/a/23442780
+    void autoExpandEnvironmentVariables(std::string& text) {
+        std::size_t tilde;
+        while((tilde = text.find("~")) != std::string::npos) {
+            text.replace(tilde, tilde+1, "${HOME}");
+        }
+        static std::regex env("\\$(?:\\{([^}]+)\\}|([^/]+))");
+        std::smatch match;
+        while(std::regex_search(text, match, env)) {
+            std::string matchStr = match[1].str().empty()? match[2].str() : match[1].str();
+            auto s = getenv(matchStr.c_str());
+            const std::string var(s == NULL? "" : s);
+            text.replace(match[0].first, match[0].second, var);
+        }
+    }
+
+    // Returns the setting, or an empty string in the case of an error
+    std::string getString(const std::string& key) {
+        if(! dummySettings.contains(key)) {
+            return "";
+        }
+        std::string ret = dummySettings.at(key);
+        autoExpandEnvironmentVariables(ret);
+        return ret;
+    }
+}