55 lines
1.5 KiB
V
55 lines
1.5 KiB
V
// Copyright (c) 2021 Lars Pontoppidan. All rights reserved.
|
|
// Use of this source code is governed by an MIT license
|
|
// that can be found in the LICENSE file.
|
|
module input
|
|
|
|
import os
|
|
|
|
// Config is used to configure input to the toml module.
|
|
// Only one of the fields `text` and `file_path` is allowed to be set at time of configuration.
|
|
pub struct Config {
|
|
pub:
|
|
text string // TOML text
|
|
file_path string // '/path/to/file.toml'
|
|
}
|
|
|
|
// auto_config returns an, automatic determined, input Config based on heuristics
|
|
// found in `toml`
|
|
pub fn auto_config(toml string) ?Config {
|
|
mut config := Config{}
|
|
if !toml.contains('\n') && os.is_file(toml) {
|
|
config = Config{
|
|
file_path: toml
|
|
}
|
|
} else {
|
|
config = Config{
|
|
text: toml
|
|
}
|
|
}
|
|
config.validate() ?
|
|
return config
|
|
}
|
|
|
|
// validate returns an optional error if more than one of the fields
|
|
// in `Config` has a non-default value (empty string).
|
|
pub fn (c Config) validate() ? {
|
|
if c.file_path != '' && c.text != '' {
|
|
error(@MOD + '.' + @FN +
|
|
' ${typeof(c).name} should contain only one of the fields `file_path` OR `text` filled out')
|
|
} else if c.file_path == '' && c.text == '' {
|
|
error(@MOD + '.' + @FN +
|
|
' ${typeof(c).name} must either contain a valid `file_path` OR a non-empty `text` field')
|
|
}
|
|
}
|
|
|
|
pub fn (c Config) read_input() ?string {
|
|
mut text := c.text
|
|
if os.is_file(c.file_path) {
|
|
text = os.read_file(c.file_path) or {
|
|
return error(@MOD + '.' + @STRUCT + '.' + @FN +
|
|
' Could not read "$c.file_path": "$err.msg"')
|
|
}
|
|
}
|
|
return text
|
|
}
|