public static IDistinctValuedDictionary <TValue, TKey> Invert <TKey, TValue>(this IDistinctValuedDictionary <TKey, TValue> dictionary)
{
var invertedDictionary = new Dictionary <TValue, TKey>().AsDistinctValued();
dictionary.ForEach(pair => invertedDictionary.Add(pair.Value, pair.Key));
return(invertedDictionary);
}
public async Task <IDictionary <TKey, string> > ReadContentsByKey <TKey>(IDistinctValuedDictionary <TKey, string> filePathsByKey)
{
var output = new Dictionary <TKey, string>();
foreach (var pair in filePathsByKey)
{
var content = await FileHelper.Read(pair.Value);
output.Add(pair.Key, content);
}
return(output);
}
// Sync.
public static IDictionary <TKey, TOut> ProcessByKey <TKey, TIn, TOut>(
Func <TIn, TOut> processor,
IDistinctValuedDictionary <TKey, TIn> inputsByKey)
{
var output = new Dictionary <TKey, TOut>();
foreach (var pair in inputsByKey)
{
var result = processor(pair.Value);
output.Add(pair.Key, result);
}
return(output);
}
public Task <IDictionary <TKey, bool> > DeleteFilesByKey <TKey>(IDistinctValuedDictionary <TKey, string> filePathsByKey)
{
var output = new Dictionary <TKey, bool>();
foreach (var pair in filePathsByKey)
{
var exists = FileHelper.Exists(pair.Value);
FileHelper.DeleteOnlyIfExists(pair.Value);
output.Add(pair.Key, exists);
}
return(Task.FromResult(output as IDictionary <TKey, bool>));
}
public static IDistinctValuedDictionary <TKey, string> GetFilePathsByKey <TKey>(this IStringlyTypedPathOperator stringlyTypedPathOperator,
string directoryPath,
IDistinctValuedDictionary <TKey, string> fileNamesByKey)
{
return(fileNamesByKey.ToDictionary(
pair => pair.Key,
pair => stringlyTypedPathOperator.GetFilePath(directoryPath, pair.Value))
.AsDistinctValued());
}
public static async Task <IDictionary <TKey, bool> > ExistsFilesByKey <TKey>(this IFileSystemOperator @operator, IDistinctValuedDictionary <TKey, string> filePathsByKey)
{
var keysByFilePath = filePathsByKey.Invert();
var existsByFilePath = await @operator.ExistsFiles(keysByFilePath.Keys.AsDistinct());
var output = keysByFilePath.Join(existsByFilePath,
keys => keys.Key,
exists => exists.Key,
(keys, exists) => (Key: keys.Value, Exists: exists.Value))
.ToDictionary(
x => x.Key,
x => x.Exists);
return(output);
}
