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(.module:
lux
(lux (control [monad #+ do]
["ex" exception #+ exception:])
(data (coll [array]))
(time ["i" instant]
["d" duration])
(world [blob #+ Blob])
[io #+ Process]
[host]))
(type: #export File Text)
(exception: #export (could-not-read-all-data {file File})
file)
(exception: #export (not-a-directory {file File})
file)
(host.import #long java/io/File
(new [String])
(exists [] #io #try boolean)
(mkdirs [] #io #try boolean)
(delete [] #io #try boolean)
(length [] #io #try long)
(listFiles [] #io #try #? (Array java/io/File))
(getAbsolutePath [] #io #try String)
(renameTo [java/io/File] #io #try boolean)
(isFile [] #io #try boolean)
(isDirectory [] #io #try boolean)
(lastModified [] #io #try long)
(setLastModified [long] #io #try boolean)
(canRead [] #io #try boolean)
(canWrite [] #io #try boolean)
(canExecute [] #io #try boolean)
(#static separator String))
(host.import java/lang/AutoCloseable
(close [] #io #try void))
(host.import java/io/OutputStream
(write [(Array byte)] #io #try void)
(flush [] #io #try void))
(host.import java/io/FileOutputStream
(new [java/io/File boolean] #io #try))
(host.import java/io/InputStream
(read [(Array byte)] #io #try int))
(host.import java/io/FileInputStream
(new [java/io/File] #io #try))
(do-template [<name> <flag>]
[(def: #export (<name> data file)
(-> Blob File (Process Unit))
(do io.Monad<Process>
[stream (FileOutputStream::new [(java/io/File::new file) <flag>])
_ (OutputStream::write [data] stream)
_ (OutputStream::flush [] stream)]
(AutoCloseable::close [] stream)))]
[append true]
[write false]
)
(def: #export (read file)
(-> File (Process Blob))
(do io.Monad<Process>
[#let [file' (java/io/File::new file)]
size (java/io/File::length [] file')
#let [data (blob.create (int-to-nat size))]
stream (FileInputStream::new [file'])
bytes-read (InputStream::read [data] stream)
_ (AutoCloseable::close [] stream)]
(if (i/= size bytes-read)
(wrap data)
(io.io (ex.throw could-not-read-all-data file)))))
(def: #export (size file)
(-> File (Process Nat))
(do io.Monad<Process>
[size (java/io/File::length [] (java/io/File::new file))]
(wrap (int-to-nat size))))
(def: #export (files dir)
(-> File (Process (List File)))
(do io.Monad<Process>
[?files (java/io/File::listFiles [] (java/io/File::new dir))]
(case ?files
(#.Some files)
(monad.map @ (java/io/File::getAbsolutePath [])
(array.to-list files))
#.None
(io.throw not-a-directory dir))))
(do-template [<name> <method>]
[(def: #export (<name> file)
(-> File (Process Bool))
(<method> [] (java/io/File::new file)))]
[exists? java/io/File::exists]
[make-directory java/io/File::mkdirs]
[delete java/io/File::delete]
[file? java/io/File::isFile]
[directory? java/io/File::isDirectory]
[can-read? java/io/File::canRead]
[can-write? java/io/File::canWrite]
[can-execute? java/io/File::canExecute]
)
(def: #export (move target source)
(-> File File (Process Bool))
(java/io/File::renameTo [(java/io/File::new target)]
(java/io/File::new source)))
(def: #export (last-modified file)
(-> File (Process i.Instant))
(do io.Monad<Process>
[millis (java/io/File::lastModified [] (java/io/File::new file))]
(wrap (|> millis d.from-millis i.absolute))))
(def: #export (modify time file)
(-> i.Instant File (Process Bool))
(java/io/File::setLastModified [(|> time i.relative d.to-millis)]
(java/io/File::new file)))
(def: #export separator Text java/io/File::separator)
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