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use crate::ShellFlag;
/// Context passed from the shell to the completion system,
/// providing information about the current command line state
/// to guide how completions should be generated.
#[derive(Default, Debug)]
#[cfg_attr(feature = "general_renderer", derive(serde::Serialize))]
pub struct ShellContext {
/// The full command line (-f / --command-line)
pub command_line: String,
/// Cursor position (-C / --cursor-position)
pub cursor_position: usize,
/// Current word (-w / --current-word)
pub current_word: String,
/// Previous word (-p / --previous-word)
pub previous_word: String,
/// Command name (-c / --command-name)
pub command_name: String,
/// Word index (-i / --word-index)
pub word_index: usize,
/// All words (-a / --all-words)
pub all_words: Vec<String>,
/// Flag to indicate completion context (-F / --shell-flag)
pub shell_flag: ShellFlag,
}
impl TryFrom<Vec<String>> for ShellContext {
type Error = String;
fn try_from(args: Vec<String>) -> Result<Self, Self::Error> {
use std::collections::HashMap;
// Parse arguments into a map for easy lookup
let mut arg_map = HashMap::new();
let mut i = 0;
while i < args.len() {
if args[i].starts_with('-') {
let key = args[i].clone();
if i + 1 < args.len() && !args[i + 1].starts_with('-') {
arg_map.insert(key, args[i + 1].clone());
i += 2;
} else {
arg_map.insert(key, String::new());
i += 1;
}
} else {
i += 1;
}
}
// Extract values with defaults
let command_line = arg_map.get("-f").cloned().unwrap_or_default();
let cursor_position = arg_map
.get("-C")
.and_then(|s| s.parse().ok())
.unwrap_or_default();
let current_word = arg_map.get("-w").cloned().unwrap_or_default();
let previous_word = arg_map.get("-p").cloned().unwrap_or_default();
let command_name = arg_map.get("-c").cloned().unwrap_or_default();
let word_index = arg_map
.get("-i")
.and_then(|s| s.parse().ok())
.unwrap_or_default();
let shell_flag = arg_map
.get("-F")
.cloned()
.map(ShellFlag::from)
.unwrap_or(ShellFlag::Other("unknown".to_string()));
let all_words = command_line
.split_whitespace()
.map(|s| s.replace('^', "-"))
.collect();
Ok(ShellContext {
command_line: command_line.replace('^', "-"),
cursor_position,
current_word: current_word.replace('^', "-"),
previous_word: previous_word.replace('^', "-"),
command_name: command_name.replace('^', "-"),
word_index,
all_words,
shell_flag,
})
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_try_from_full_args() {
let args = vec![
"-f".to_string(),
"git commit ^m 'test'".to_string(),
"-C".to_string(),
"12".to_string(),
"-w".to_string(),
"commit".to_string(),
"-p".to_string(),
"git".to_string(),
"-c".to_string(),
"git".to_string(),
"-i".to_string(),
"1".to_string(),
"-F".to_string(),
"bash".to_string(),
];
let context = ShellContext::try_from(args).unwrap();
assert_eq!(context.command_line, "git commit -m 'test'");
assert_eq!(context.cursor_position, 12);
assert_eq!(context.current_word, "commit");
assert_eq!(context.previous_word, "git");
assert_eq!(context.command_name, "git");
assert_eq!(context.word_index, 1);
assert_eq!(context.all_words, vec!["git", "commit", "-m", "'test'"]);
assert!(matches!(context.shell_flag, ShellFlag::Bash));
}
#[test]
fn test_try_from_partial_args() {
let args = vec![
"-f".to_string(),
"ls ^la".to_string(),
"-C".to_string(),
"5".to_string(),
];
let context = ShellContext::try_from(args).unwrap();
assert_eq!(context.command_line, "ls -la");
assert_eq!(context.cursor_position, 5);
assert_eq!(context.current_word, "");
assert_eq!(context.previous_word, "");
assert_eq!(context.command_name, "");
assert_eq!(context.word_index, 0);
assert_eq!(context.all_words, vec!["ls", "-la"]);
assert!(matches!(context.shell_flag, ShellFlag::Other(ref s) if s == "unknown"));
}
#[test]
fn test_try_from_empty_args() {
let args = vec![];
let context = ShellContext::try_from(args).unwrap();
assert_eq!(context.command_line, "");
assert_eq!(context.cursor_position, 0);
assert_eq!(context.current_word, "");
assert_eq!(context.previous_word, "");
assert_eq!(context.command_name, "");
assert_eq!(context.word_index, 0);
assert!(context.all_words.is_empty());
assert!(matches!(context.shell_flag, ShellFlag::Other(ref s) if s == "unknown"));
}
#[test]
fn test_try_from_flag_without_value() {
let args = vec!["-F".to_string()];
let context = ShellContext::try_from(args).unwrap();
assert!(matches!(context.shell_flag, ShellFlag::Other(ref s) if s == ""));
}
#[test]
fn test_all_words_splitting() {
let args = vec!["-f".to_string(), " cmd arg1 arg2 ".to_string()];
let context = ShellContext::try_from(args).unwrap();
assert_eq!(context.all_words, vec!["cmd", "arg1", "arg2"]);
}
}
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