71 lines
2.4 KiB
Rust
71 lines
2.4 KiB
Rust
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use clap::{Arg, ArgMatches, App, SubCommand};
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use tag::Tag;
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/// Generates a clap::SubCommand to be integrated in the commandline-ui builder for building a
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/// "tags --add foo --remove bar" subcommand to do tagging action.
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pub fn tag_subcommand<'a, 'b>() -> App<'a, 'b> {
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SubCommand::with_name("tags")
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.author("Matthias Beyer <mail@beyermatthias.de>")
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.version("0.1")
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.about("Add or remove tags")
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.arg(Arg::with_name("add-tags")
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.short("a")
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.long("add")
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.takes_value(true)
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.multiple(true)
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.help("Add tags, seperated by comma or by specifying multiple times"))
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.arg(Arg::with_name("remove-tags")
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.short("r")
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.long("remove")
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.takes_value(true)
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.multiple(true)
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.help("Remove tags, seperated by comma or by specifying multiple times"))
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}
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/// Generates a clap::Arg which can be integrated into the commandline-ui builder for building a
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/// "-t" or "--tags" argument which takes values for tagging actions (add, remove)
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pub fn tag_argument<'a, 'b>() -> Arg<'a, 'b> {
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Arg::with_name("specify-tags")
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.short("t")
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.long("tags")
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.takes_value(true)
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.multiple(true)
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.help("Add or remove tags, prefixed by '+' (for adding) or '-' (for removing)")
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}
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/// Get the tags which should be added from the commandline
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///
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/// Returns none if the argument was not specified
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pub fn get_add_tags(matches: &ArgMatches) -> Option<Vec<Tag>> {
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extract_tags(matches, "add-tags", '+')
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}
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/// Get the tags which should be removed from the commandline
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///
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/// Returns none if the argument was not specified
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pub fn get_remove_tags(matches: &ArgMatches) -> Option<Vec<Tag>> {
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extract_tags(matches, "remove-tags", '-')
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}
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fn extract_tags(matches: &ArgMatches, specifier: &str, specchar: char) -> Option<Vec<Tag>> {
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if let Some(submatch) = matches.subcommand_matches("tags") {
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submatch.values_of(specifier)
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.map(|values| values.map(String::from).collect())
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} else {
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matches.values_of("specify-tags")
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.map(|argmatches| {
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argmatches
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.map(String::from)
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.filter(|s| s.chars().next() == Some(specchar))
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.map(|s| {
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String::from(s.split_at(1).1)
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})
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.collect()
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})
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}
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}
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