chore: 优化image编码及log

Author: MistEO

source/MaaUtils/Codec/Codec.cpp

@@ -158,13 +158,21 @@ bool regex_valid(const std::wstring& regex)
 
 cv::Mat decode_image(const std::string& data)
 {
+    if (data.empty()) {
+        return {};
+    }
+
     std::string base64 = base64::base64_decode(data);
     std::vector<uchar> buffer(std::make_move_iterator(base64.begin()), std::make_move_iterator(base64.end()));
     return cv::imdecode(buffer, cv::IMREAD_COLOR);
 }
 
 std::string encode_image(const cv::Mat& image)
 {
+    if (image.empty()) {
+        return {};
+    }
+
     std::vector<uchar> buffer;
     cv::imencode(".png", image, buffer);
     return base64::base64_encode(buffer.data(), buffer.size());

source/include/MaaAgent/Message.hpp

@@ -907,9 +907,17 @@ inline std::string short_str(const std::string& str)
 inline json::value log_msg(const json::value& j)
 {
     json::value j_copy = j;
-    if (j.exists("image")) {
+    if (j_copy.exists("image")) {
         j_copy["image"] = short_str(j.at("image").as_string());
     }
+    if (j_copy.exists("raw")) {
+        j_copy["raw"] = short_str(j.at("raw").as_string());
+    }
+    if (j_copy.exists("draws")) {
+        for (auto& d : j_copy["draws"].as_array()) {
+            d = short_str(d.as_string());
+        }
+    }
     return j_copy;
 }