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// Copyright (C) 2014 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.server.project;
import com.google.common.flogger.FluentLogger;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
import org.eclipse.jgit.errors.InvalidPatternException;
import org.eclipse.jgit.fnmatch.FileNameMatcher;
import org.eclipse.jgit.lib.Config;
public class ConfiguredMimeTypes {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
private static final String MIMETYPE = "mimetype";
private static final String KEY_PATH = "path";
private final List<TypeMatcher> matchers;
ConfiguredMimeTypes(String projectName, Config rc) {
Set<String> types = rc.getSubsections(MIMETYPE);
if (types.isEmpty()) {
matchers = Collections.emptyList();
} else {
matchers = new ArrayList<>();
for (String typeName : types) {
for (String path : rc.getStringList(MIMETYPE, typeName, KEY_PATH)) {
try {
add(typeName, path);
} catch (PatternSyntaxException | InvalidPatternException e) {
logger.atWarning().log(
"Ignoring invalid %s.%s.%s = %s in project %s: %s",
MIMETYPE, typeName, KEY_PATH, path, projectName, e.getMessage());
}
}
}
}
}
private void add(String typeName, String path)
throws PatternSyntaxException, InvalidPatternException {
if (path.startsWith("^")) {
matchers.add(new ReType(typeName, path));
} else {
matchers.add(new FnType(typeName, path));
}
}
public String getMimeType(String path) {
for (TypeMatcher m : matchers) {
if (m.matches(path)) {
return m.type;
}
}
return null;
}
private abstract static class TypeMatcher {
final String type;
TypeMatcher(String type) {
this.type = type;
}
abstract boolean matches(String path);
}
private static class FnType extends TypeMatcher {
private final FileNameMatcher matcher;
FnType(String type, String pattern) throws InvalidPatternException {
super(type);
this.matcher = new FileNameMatcher(pattern, null);
}
@Override
boolean matches(String input) {
FileNameMatcher m = new FileNameMatcher(matcher);
m.append(input);
return m.isMatch();
}
}
private static class ReType extends TypeMatcher {
private final Pattern re;
ReType(String type, String pattern) throws PatternSyntaxException {
super(type);
this.re = Pattern.compile(pattern);
}
@Override
boolean matches(String input) {
return re.matcher(input).matches();
}
}
}
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