okk.moe
🖨️ esc/pos implementation in gleam
feat: add usb printing
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gleam.toml
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gleam.toml
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manifest.toml
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manifest.toml
···
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# You typically do not need to edit this file
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packages = [
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{ name = "filepath", version = "1.1.2", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "filepath", source = "hex", outer_checksum = "B06A9AF0BF10E51401D64B98E4B627F1D2E48C154967DA7AF4D0914780A6D40A" },
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{ name = "gleam_erlang", version = "1.3.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_erlang", source = "hex", outer_checksum = "1124AD3AA21143E5AF0FC5CF3D9529F6DB8CA03E43A55711B60B6B7B3874375C" },
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{ name = "gleam_stdlib", version = "0.65.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "7C69C71D8C493AE11A5184828A77110EB05A7786EBF8B25B36A72F879C3EE107" },
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{ name = "gleeunit", version = "1.6.1", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleeunit", source = "hex", outer_checksum = "FDC68A8C492B1E9B429249062CD9BAC9B5538C6FBF584817205D0998C42E1DAC" },
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{ name = "mug", version = "3.1.0", build_tools = ["gleam"], requirements = ["gleam_erlang", "gleam_stdlib"], otp_app = "mug", source = "hex", outer_checksum = "C01279D98E40371DA23461774B63F0E3581B8F1396049D881B0C7EB32799D93F" },
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{ name = "simplifile", version = "2.3.2", build_tools = ["gleam"], requirements = ["filepath", "gleam_stdlib"], otp_app = "simplifile", source = "hex", outer_checksum = "E049B4DACD4D206D87843BCF4C775A50AE0F50A52031A2FFB40C9ED07D6EC70A" },
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]
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[requirements]
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gleam_stdlib = { version = ">= 0.44.0 and < 2.0.0" }
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gleeunit = { version = ">= 1.0.0 and < 2.0.0" }
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mug = { version = ">= 3.1.0 and < 4.0.0" }
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simplifile = { version = ">= 2.3.2 and < 3.0.0" }
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src/escpos/printer.gleam
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src/escpos/printer.gleam
···
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import escpos/protocol
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import gleam/result
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import mug
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import simplifile
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@internal
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pub type CommandBuffer {
···
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}
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pub opaque type Printer {
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Printer(socket: mug.Socket)
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NetworkPrinter(socket: mug.Socket)
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UsbPrinter(device: String)
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}
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pub opaque type PrinterError {
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ConnectionFailed(mug.ConnectError)
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DisconnectionFailed(mug.Error)
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TransmissionError(mug.Error)
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PrintError(mug.Error)
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NetworkPrintError(mug.Error)
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UsbPrintError(simplifile.FileError)
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UsbDeviceError(simplifile.FileError)
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UsbDeviceNotFound
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}
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pub fn device(path: String) -> Result(Printer, PrinterError) {
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case simplifile.is_file(path) {
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Ok(True) -> Ok(UsbPrinter(device: path))
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Ok(False) -> Error(UsbDeviceNotFound)
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Error(err) -> Error(UsbDeviceError(err))
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}
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}
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pub fn connect(ip: String, port: Int) -> Result(Printer, PrinterError) {
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|> result.map_error(TransmissionError),
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)
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Ok(Printer(socket))
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Ok(NetworkPrinter(socket))
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}
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/// Sends the CommandBuffer to the printer
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pub fn print(cb: CommandBuffer, printer: Printer) -> Result(Nil, PrinterError) {
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mug.send(printer.socket, cb.data)
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|> result.map_error(PrintError)
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case printer {
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NetworkPrinter(socket:) ->
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mug.send(socket, cb.data)
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|> result.map_error(NetworkPrintError)
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UsbPrinter(device:) ->
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simplifile.write_bits(device, cb.data)
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|> result.map_error(UsbPrintError)
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}
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}
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pub fn disconnect(printer: Printer) -> Result(Nil, PrinterError) {
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mug.shutdown(printer.socket)
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|> result.map_error(DisconnectionFailed)
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case printer {
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NetworkPrinter(socket:) ->
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mug.shutdown(socket)
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|> result.map_error(DisconnectionFailed)
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UsbPrinter(_) -> Ok(Nil)
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}
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}