parent
02c73176a5
commit
f328800ce8
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#include <cstdlib>
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#include <string>
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#include <fstream>
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#include <unordered_map>
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#include <sstream>
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#include <sys/stat.h>
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#include <libreborn/libreborn.h>
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#include "launcher.h"
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#include "cache.h"
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// Get Cache Path
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static std::string get_cache_path() {
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const char *home = getenv("HOME");
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if (home == NULL) {
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IMPOSSIBLE();
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}
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return std::string(home) + "/.minecraft-pi/.launcher-cache";
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}
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// Load
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launcher_cache empty_cache = {
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.username = DEFAULT_USERNAME,
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.render_distance = DEFAULT_RENDER_DISTANCE,
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.feature_flags = {}
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};
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launcher_cache load_cache() {
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// Log
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DEBUG("Loading Launcher Cache...");
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// Open File
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std::ifstream stream(get_cache_path(), std::ios::in | std::ios::binary);
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if (!stream) {
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// No Warning If File Doesn't Exist
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struct stat s;
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if (stat(get_cache_path().c_str(), &s) == 0) {
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WARN("Unable To Open Launcher Cache For Loading");
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}
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return empty_cache;
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}
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// Check Version
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unsigned char cache_version;
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stream.read((char *) &cache_version, 1);
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if (stream.eof() || cache_version != (unsigned char) CACHE_VERSION) {
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WARN("Invalid Launcher Cache Version");
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stream.close();
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return empty_cache;
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}
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// Load Username And Render Distance
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launcher_cache cache;
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std::getline(stream, cache.username, '\0');
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std::getline(stream, cache.render_distance, '\0');
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// Load Feature Flags
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std::string flag;
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while (!stream.eof() && std::getline(stream, flag, '\0')) {
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if (flag.length() > 0) {
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unsigned char is_enabled = 0;
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stream.read((char *) &is_enabled, 1);
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cache.feature_flags[flag] = is_enabled != (unsigned char) 0;
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}
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stream.peek();
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}
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// Finish
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stream.close();
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if (!stream) {
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WARN("Failure While Loading Launcher Cache: %s", strerror(errno));
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return empty_cache;
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}
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// Return
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return cache;
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}
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// Save
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#define write_env_to_stream(stream, env) \
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{ \
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const char *env_value = getenv(env); \
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if (env == NULL) { \
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IMPOSSIBLE(); \
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} \
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stream.write(env_value, strlen(env_value) + 1); \
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}
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void save_cache() {
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// Log
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DEBUG("Saving Launcher Cache...");
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// Open File
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std::ofstream stream(get_cache_path(), std::ios::out | std::ios::binary);
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if (!stream) {
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WARN("Unable To Open Launcher Cache For Saving");
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return;
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}
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// Save Cache Version
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unsigned char cache_version = (unsigned char) CACHE_VERSION;
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stream.write((const char *) &cache_version, 1);
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// Save Username And Render Distance
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write_env_to_stream(stream, "MCPI_USERNAME");
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write_env_to_stream(stream, "MCPI_RENDER_DISTANCE");
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// Save Feature Flags
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std::unordered_map<std::string, bool> flags;
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load_available_feature_flags([&flags](std::string flag) {
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std::string stripped_flag = strip_feature_flag_default(flag, NULL);
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flags[stripped_flag] = false;
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});
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{
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const char *enabled_flags = getenv("MCPI_FEATURE_FLAGS");
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if (enabled_flags == NULL) {
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IMPOSSIBLE();
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}
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std::istringstream enabled_flags_stream(enabled_flags);
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std::string flag;
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while (std::getline(enabled_flags_stream, flag, '|')) {
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if (flag.length() > 0) {
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flags[flag] = true;
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}
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}
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}
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for (auto &it : flags) {
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stream.write(it.first.c_str(), it.first.size() + 1);
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unsigned char val = it.second ? (unsigned char) 1 : (unsigned char) 0;
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stream.write((const char *) &val, 1);
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}
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// Finish
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stream.close();
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if (!stream.good()) {
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WARN("Failure While Saving Launcher Cache");
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}
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}
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@ -0,0 +1,19 @@
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#pragma once
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#include <string>
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#include <unordered_map>
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// Cache Version
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#define CACHE_VERSION 0
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// Load Cache
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typedef struct {
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std::string username;
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std::string render_distance;
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std::unordered_map<std::string, bool> feature_flags;
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} launcher_cache;
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extern launcher_cache empty_cache;
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launcher_cache load_cache();
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// Save Cache
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void save_cache();
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@ -0,0 +1,12 @@
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#pragma once
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#include <string>
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#include <functional>
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// Defaults
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#define DEFAULT_USERNAME "StevePi"
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#define DEFAULT_RENDER_DISTANCE "Short"
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// Feature Flags
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std::string strip_feature_flag_default(std::string flag, bool *default_ret);
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void load_available_feature_flags(std::function<void(std::string)> callback);
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@ -0,0 +1,4 @@
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#include <libreborn/log.h>
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// Debug Tag
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const char *reborn_debug_tag = "";
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