Validate mod files

src/main/java/dev/frogmc/frogloader/impl/mod/ModPropertiesReader.java

@@ -7,6 +7,7 @@ import java.nio.file.FileSystem;
 import java.nio.file.FileSystems;
 import java.nio.file.Path;
 import java.util.*;
+import java.util.function.Function;
 import java.util.stream.Collectors;
 
 import com.electronwill.nightconfig.core.CommentedConfig;
@@ -16,7 +17,10 @@ import com.electronwill.nightconfig.toml.TomlParser;
 import dev.frogmc.frogloader.api.mod.ModDependencies;
 import dev.frogmc.frogloader.api.mod.ModExtensions;
 import dev.frogmc.frogloader.api.mod.ModProperties;
+import dev.frogmc.frogloader.api.mod.SemVer;
+import dev.frogmc.frogloader.impl.SemVerParseException;
 import lombok.AllArgsConstructor;
+import lombok.Getter;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -32,7 +36,7 @@ public class ModPropertiesReader {
 			CommentedConfig props = PARSER.parse(fs.getPath(PROPERTIES_FILE_NAME), FileNotFoundAction.THROW_ERROR);
 
 			return Optional.of(readProperties(props, Collections.singleton(mod)));
-		} catch (IOException e) {
+		} catch (IOException | InvalidModPropertiesException e) {
 			LOGGER.warn("Failed to read mod properties: ", e);
 		}
 
@@ -60,7 +64,7 @@ public class ModPropertiesReader {
 		return Optional.empty();
 	}
 
-	private static ModProperties readProperties(UnmodifiableConfig config, Collection<Path> sources) {
+	private static ModProperties readProperties(UnmodifiableConfig config, Collection<Path> sources) throws InvalidModPropertiesException {
 		String manifestVer = config.get("frog.format_version");
 
 		try {
@@ -73,53 +77,91 @@ public class ModPropertiesReader {
 	@AllArgsConstructor
 	private enum FormatVersion {
 		V1_0_0("1.0.0", (config, sources) -> {
+			List<String> badProperties = new ArrayList<>();
+
 			String id = config.get("frog.mod.id");
 			String name = config.get("frog.mod.name");
 			String icon = config.get("frog.mod.icon");
 			String version = config.get("frog.mod.version");
-			String license = config.get("frog.mod.license");
+			String license = Objects.requireNonNullElse(config.get("frog.mod.license"), "");
 
-			if (license == null) {
+			if (id == null || id.isEmpty())
-				license = "";
+				badProperties.add("frog.mod.id");
+
+			if (name == null || name.isEmpty())
+				badProperties.add("frog.mod.name");
+
+			SemVer semVer = null;
+
+			if (version == null || version.isEmpty())
+				badProperties.add("frog.mod.version");
+			else {
+ 				try {
+					semVer = SemVerImpl.parse(version);
+				} catch (SemVerParseException e) {
+					badProperties.add("frog.mod.version");
+				}
 			}
 
 			List<UnmodifiableConfig> creditsList = config.get("frog.mod.credits");
 			Map<String, Collection<String>> credits = new HashMap<>();
 			if (creditsList != null) {
-				creditsList.forEach(c -> credits.put(c.get("name"), c.get("roles")));
+				int i = 0;
+
+				for (UnmodifiableConfig entry : creditsList) {
+					String entryName = entry.get("name");
+					Collection<String> entryRoles = entry.get("roles");
+
+					if (entryName == null || entryName.isEmpty())
+						badProperties.add("frog.mod.credits." + i + ".name");
+
+					if (entryRoles == null || entryRoles.isEmpty())
+						badProperties.add("frog.mod.credits." + i + ".name");
+
+					credits.put(entryName, entryRoles);
+
+					++i;
+				}
 			}
 
-			Collection<ModDependencies.Entry> depends = new HashSet<>();
+			Function<String, Collection<ModDependencies.Entry>> parseDependencies = key -> {
-			List<UnmodifiableConfig> dependsConfig = config.get("frog.dependencies.depends");
+				Collection<ModDependencies.Entry> result = new HashSet<>();
-			if (dependsConfig != null) {
+
-				dependsConfig.forEach(entry -> depends.add(new ModDependencies.Entry(entry.get("id"), entry.get("versions"), entry.get("link"), entry.get("name"))));
+				List<UnmodifiableConfig> dependenciesConfig = config.get("frog.dependencies." + key);
+				if (dependenciesConfig != null) {
+					int i = 0;
+
+					for (UnmodifiableConfig entry : dependenciesConfig) {
+						String entryId = entry.get("id");
+						String entryVersions = entry.get("versions");
+
+						if (entryId == null || entryId.isEmpty())
+							badProperties.add("frog.dependencies." + key + '.' + i + ".id");
+
+						result.add(new ModDependencies.Entry(entryId, entryVersions, entry.get("link"), entry.get("name")));
+
+						++i;
+					}
 				}
 
-			Collection<ModDependencies.Entry> breaks = new HashSet<>();
+				return result;
-			List<UnmodifiableConfig> breaksConfig = config.get("frog.dependencies.breaks");
+			};
-			if (breaksConfig != null) {
-				breaksConfig.forEach(entry -> breaks.add(new ModDependencies.Entry(entry.get("id"), entry.get("versions"), entry.get("link"), entry.get("name"))));
-			}
 
-			Collection<ModDependencies.Entry> suggests = new HashSet<>();
-			List<UnmodifiableConfig> suggestsConfig = config.get("frog.dependencies.suggests");
-			if (suggestsConfig != null) {
-				suggestsConfig.forEach(entry -> suggests.add(new ModDependencies.Entry(entry.get("id"), entry.get("versions"), entry.get("link"), entry.get("name"))));
-			}
 
-			Collection<ModDependencies.Entry> provides = new HashSet<>();
+			var depends = parseDependencies.apply("depends");
-			List<UnmodifiableConfig> providesConfig = config.get("frog.dependencies.provides");
+			var breaks = parseDependencies.apply("breaks");
-			if (providesConfig != null) {
+			var suggests = parseDependencies.apply("suggests");
-				providesConfig.forEach(entry -> provides.add(new ModDependencies.Entry(entry.get("id"), entry.get("version"), entry.get("link"), entry.get("name"))));
+			var provides = parseDependencies.apply("provides");
-			}
+
+			if (!badProperties.isEmpty())
+				throw new InvalidModPropertiesException(id, sources, badProperties);
 
 			UnmodifiableConfig extensionsConfig = config.get("frog.extensions");
 			Map<String, Object> extensions = new HashMap<>();
-			if (extensionsConfig != null) {
+			if (extensionsConfig != null)
 				extensionsConfig.entrySet().forEach(entry -> extensions.put(entry.getKey(), entry.getValue()));
-			}
 
-			return new ModPropertiesImpl(id, name, icon, SemVerImpl.parse(version), license, Collections.unmodifiableMap(credits),
+			return new ModPropertiesImpl(id, name, icon, semVer, license, Collections.unmodifiableMap(credits),
 					new ModDependencies(depends, breaks, suggests, provides), ModExtensions.of(extensions), sources);
 		});
 
@@ -133,8 +175,26 @@ public class ModPropertiesReader {
 
 		@FunctionalInterface
 		public interface Parser {
-			ModProperties parse(UnmodifiableConfig config, Collection<Path> sources) throws IOException;
+			ModProperties parse(UnmodifiableConfig config, Collection<Path> sources) throws IOException, InvalidModPropertiesException;
 		}
 	}
+
+	@Getter
+	public static class InvalidModPropertiesException extends Exception {
+
+		private final Collection<String> invalid;
+
+		public InvalidModPropertiesException(String id, Collection<Path> sources, Collection<String> invalid) {
+			super(
+				"Invalid properties for %s (%s) - invalid or missing values for: %s".formatted(
+					Objects.requireNonNullElse(id, "<unknown>"),
+					sources.stream().map(Path::toString).collect(Collectors.joining(", ")),
+					String.join(", ", invalid)
+				)
+			);
+			this.invalid = invalid;
+		}
+
+	}
 }