Breaking changes

Fix broken /sub2clashr and /surge2clash interface.
Add template support for base configurations.
Add support for exporting HTTP/Socks 5 nodes to Quantumult configurations.
Add support for VMess HTTP nodes in Clash configurations.
Optimize codes.

src/templates.cpp

@@ -0,0 +1,71 @@
+#include <string>
+#include <map>
+#include <sstream>
+#include <inja.hpp>
+#include <nlohmann/json.hpp>
+
+#include "templates.h"
+#include "logger.h"
+#include "misc.h"
+
+static inline void parse_json_pointer(nlohmann::json &json, const std::string &path, const std::string &value)
+{
+    std::string pointer = "/" + replace_all_distinct(path, ".", "/");
+    json[nlohmann::json::json_pointer(pointer)] = value;
+}
+
+int render_template(const std::string &content, const template_args &vars, std::string &output, const std::string &include_scope)
+{
+    nlohmann::json data;
+    for(auto &x : vars.global_vars)
+        parse_json_pointer(data["global"], x.first, x.second);
+    for(auto &x : vars.request_params)
+        parse_json_pointer(data["request"], x.first, x.second);
+    for(auto &x : vars.local_vars)
+        parse_json_pointer(data["local"], x.first, x.second);
+
+    inja::LexerConfig m_lexer_config;
+    inja::FunctionStorage m_callbacks;
+    inja::TemplateStorage m_included_templates;
+    inja::ParserConfig m_parser_config;
+
+    m_lexer_config.trim_blocks = true;
+    m_lexer_config.lstrip_blocks = true;
+    m_callbacks.add_callback("UrlDecode", 1, [](inja::Arguments &args)
+    {
+        std::string data = args.at(0)->get<std::string>();
+        return UrlDecode(data);
+    });
+    m_callbacks.add_callback("trim_of", 2, [](inja::Arguments &args)
+    {
+        std::string data = args.at(0)->get<std::string>(), target = args.at(1)->get<std::string>();
+        if(target.empty())
+            return data;
+        return trim_of(data, target[0]);
+    });
+    m_callbacks.add_callback("trim", 1, [](inja::Arguments &args)
+    {
+        std::string data = args.at(0)->get<std::string>();
+        return trim(data);
+    });
+
+    inja::Parser parser(m_parser_config, m_lexer_config, m_included_templates);
+    parser.include_scope_limit = true;
+    parser.include_scope = include_scope;
+    inja::Renderer renderer(m_included_templates, m_callbacks);
+
+    try
+    {
+        std::stringstream out;
+        renderer.render_to(out, parser.parse(content), data);
+        output = out.str();
+        return 0;
+    }
+    catch (std::exception &e)
+    {
+        output = "Template render failed! Reason: " + std::string(e.what());
+        writeLog(0, output, LOG_LEVEL_ERROR);
+        return -1;
+    }
+    return -2;
+}