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27 lines
861 B
Text
27 lines
861 B
Text
interface File
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exposes [ line, Handle, withOpen, chunk ]
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imports [ pf.Effect, Task.{ Task } ]
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Handle : [ @Handle U64 ]
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line : Handle -> Task.Task Str *
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line = \@Handle handle -> Effect.after (Effect.getFileLine handle) Task.succeed
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chunk : Handle -> Task.Task (List U8) *
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chunk = \@Handle handle -> Effect.after (Effect.getFileBytes handle) Task.succeed
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open : Str -> Task.Task Handle *
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open = \path ->
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Effect.openFile path
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|> Effect.map (\id -> @Handle id)
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|> Effect.after Task.succeed
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close : Handle -> Task.Task {} *
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close = \@Handle handle -> Effect.after (Effect.closeFile handle) Task.succeed
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withOpen : Str, (Handle -> Task {} a) -> Task {} a
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withOpen = \path, callback ->
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handle <- Task.await (open path)
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result <- Task.attempt (callback handle)
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{ } <- Task.await (close handle)
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Task.fromResult result
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