From 66c099e0973639de706b12f3e41b79f633f8837e Mon Sep 17 00:00:00 2001
From: Vaxry <vaxry@vaxry.net>
Date: Thu, 7 Mar 2024 18:14:02 +0000
Subject: [PATCH] API: add pathIsStream to SConfigOptions

---
 include/hyprlang.hpp |  8 +++++
 src/config.cpp       | 76 +++++++++++++++++++++++++++++++++++---------
 src/config.hpp       |  7 ++--
 3 files changed, 74 insertions(+), 17 deletions(-)

diff --git a/include/hyprlang.hpp b/include/hyprlang.hpp
index 96bca49..9264fab 100644
--- a/include/hyprlang.hpp
+++ b/include/hyprlang.hpp
@@ -107,6 +107,13 @@ namespace Hyprlang {
             Don't throw on a missing config file. Carry on as if nothing happened.
         */
         bool allowMissingConfig = false;
+
+        /*!
+            \since 0.4.2
+
+            Treat configPath as a raw config stream.
+        */
+        bool pathIsStream = false;
     };
 
     /*!
@@ -429,6 +436,7 @@ namespace Hyprlang {
         void         clearState();
         void         applyDefaultsToCat(SSpecialCategory& cat);
         void         retrieveKeysForCat(const char* category, const char*** out, size_t* len);
+        CParseResult parseRawStream(const std::string& stream);
     };
 };
 #endif
\ No newline at end of file
diff --git a/src/config.cpp b/src/config.cpp
index f377d57..e342228 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -6,6 +6,7 @@
 #include <algorithm>
 #include <cmath>
 #include <expected>
+#include <sstream>
 
 using namespace Hyprlang;
 extern "C" char** environ;
@@ -34,10 +35,14 @@ static std::string removeBeginEndSpacesTabs(std::string str) {
 }
 
 CConfig::CConfig(const char* path, const Hyprlang::SConfigOptions& options) {
-    impl       = new CConfigImpl;
-    impl->path = path;
+    impl = new CConfigImpl;
 
-    if (!std::filesystem::exists(impl->path)) {
+    if (options.pathIsStream)
+        impl->rawConfigString = path;
+    else
+        impl->path = path;
+
+    if (!options.pathIsStream && !std::filesystem::exists(impl->path)) {
         if (!options.allowMissingConfig)
             throw "File does not exist";
     }
@@ -593,24 +598,65 @@ CParseResult CConfig::parse() {
         applyDefaultsToCat(*sc);
     }
 
-    bool fileExists = std::filesystem::exists(impl->path);
+    CParseResult fileParseResult;
 
-    // implies options.allowMissingConfig
-    if (impl->configOptions.allowMissingConfig && !fileExists)
-        return CParseResult{};
-    else if (!fileExists) {
-        CParseResult res;
-        res.setError("Config file is missing");
-        return res;
+    if (impl->rawConfigString.empty()) {
+        bool fileExists = std::filesystem::exists(impl->path);
+
+        // implies options.allowMissingConfig
+        if (impl->configOptions.allowMissingConfig && !fileExists)
+            return CParseResult{};
+        else if (!fileExists) {
+            CParseResult res;
+            res.setError("Config file is missing");
+            return res;
+        }
+
+        std::string canonical = std::filesystem::canonical(impl->path);
+
+        fileParseResult = parseFile(canonical.c_str());
+    } else {
+        fileParseResult = parseRawStream(impl->rawConfigString);
     }
 
-    std::string  canonical = std::filesystem::canonical(impl->path);
-
-    CParseResult fileParseResult = parseFile(canonical.c_str());
-
     return fileParseResult;
 }
 
+CParseResult CConfig::parseRawStream(const std::string& stream) {
+    CParseResult      result;
+
+    std::string       line    = "";
+    int               linenum = 1;
+
+    std::stringstream str(stream);
+
+    while (std::getline(str, line)) {
+        const auto RET = parseLine(line);
+
+        if (RET.error && (impl->parseError.empty() || impl->configOptions.throwAllErrors)) {
+            if (!impl->parseError.empty())
+                impl->parseError += "\n";
+            impl->parseError += std::format("Config error at line {}: {}", linenum, RET.errorStdString);
+            result.setError(impl->parseError);
+        }
+
+        ++linenum;
+    }
+
+    if (!impl->categories.empty()) {
+        if (impl->parseError.empty() || impl->configOptions.throwAllErrors) {
+            if (!impl->parseError.empty())
+                impl->parseError += "\n";
+            impl->parseError += std::format("Config error: Unclosed category at EOF");
+            result.setError(impl->parseError);
+        }
+
+        impl->categories.clear();
+    }
+
+    return result;
+}
+
 CParseResult CConfig::parseFile(const char* file) {
     CParseResult  result;
 
diff --git a/src/config.hpp b/src/config.hpp
index dbca25c..80d21b1 100644
--- a/src/config.hpp
+++ b/src/config.hpp
@@ -66,8 +66,11 @@ struct SSpecialCategory {
 
 class CConfigImpl {
   public:
-    std::string                                              path         = "";
-    std::string                                              originalPath = "";
+    std::string path         = "";
+    std::string originalPath = "";
+
+    // if not-empty, used instead of path
+    std::string                                              rawConfigString = "";
 
     std::unordered_map<std::string, Hyprlang::CConfigValue>  values;
     std::unordered_map<std::string, SConfigDefaultValue>     defaultValues;