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package no.eliashaugsbakk.clams.server.config;
import java.io.BufferedWriter;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.PosixFilePermissions;
import java.security.SecureRandom;
import java.util.Base64;
import java.util.Properties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class AppConfig {
private static final Logger log = LoggerFactory.getLogger(AppConfig.class);
private final Properties properties = new Properties();
private Path configPath;
public void loadConfig() {
String userHome = System.getProperty("user.home");
configPath = Paths.get(userHome, ".config", "clams", "clams.properties");
if (!Files.exists(configPath)) {
generateDefaultConfig();
}
try (var reader = Files.newBufferedReader(configPath)) {
properties.load(reader);
ensureStorageDirectoryExists();
} catch (IOException e) {
throw new RuntimeException("Failed to read configuration file: " + configPath, e);
}
}
private void ensureStorageDirectoryExists() {
try {
Path storageDir = Path.of(getStorageLocation());
if (!Files.exists(storageDir)) {
Files.createDirectories(storageDir);
log.info("Created application storage directory at: {}", storageDir.toAbsolutePath());
}
setOwnerOnlyPermissions(storageDir);
} catch (IOException e) {
log.warn("Could not verify or create storage directory", e);
}
}
private void setOwnerOnlyPermissions(Path path) throws IOException {
if (!Files.exists(path)) {
return;
}
try {
Files.setPosixFilePermissions(path, PosixFilePermissions.fromString("rwx------"));
} catch (UnsupportedOperationException e) {
// Ignore on non-POSIX file systems.
}
}
private void generateDefaultConfig() {
try {
Files.createDirectories(configPath.getParent());
byte[] tokenBytes = new byte[32];
new SecureRandom().nextBytes(tokenBytes);
String token = Base64.getUrlEncoder().withoutPadding().encodeToString(tokenBytes);
Files.createDirectories(configPath.getParent());
try (BufferedWriter writer = Files.newBufferedWriter(configPath)) {
writer.write(String.format("""
storage_location=./data/
authorization_token=%s
""", token));
}
setOwnerOnlyPermissions(configPath);
log.info("Generated a default configuration file at: {}", configPath);
} catch (IOException e) {
log.error("Could not create default config file", e);
}
}
public String getStorageLocation() {
return properties.getProperty("storage_location", "./data");
}
public String getAuthToken() {
String token = properties.getProperty("authorization_token");
if (token == null || token.isBlank()) {
throw new IllegalStateException("CRITICAL: 'authorization_token' is missing or empty in config properties!");
}
return token;
}
}
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