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use std::collections::hash_map::DefaultHasher;
use std::hash::{Hash, Hasher};
use std::process::Command;
use std::time::{SystemTime, UNIX_EPOCH};
pub type BufferID = usize;
#[derive(Debug)]
pub enum BufferState {
Modified,
Unmodified,
}
#[derive(Debug)]
pub struct Buffer {
pub content: String,
pub name: String,
pub state: BufferState,
pub read_only: bool,
pub ephemeral: bool,
}
impl Buffer {
pub fn new(name: String, content: String) -> Self {
Self {
name,
content,
state: BufferState::Unmodified,
read_only: false,
ephemeral: false,
}
}
pub fn max_pos(&self) -> usize {
self.content.len()
}
pub fn valid_pos(&self, pos: usize) -> bool {
pos <= self.max_pos()
}
fn generate_shell_name(command: &str) -> String {
let mut hasher = DefaultHasher::new();
command.hash(&mut hasher);
let command_hash = hasher.finish();
let timestamp = match SystemTime::now().duration_since(UNIX_EPOCH) {
Ok(x) => x.as_secs(),
Err(_) => 0,
};
format!("shell_{:x}_{}", command_hash, timestamp)
}
pub fn from_shell_command(command: &str) -> Self {
let name = Self::generate_shell_name(command);
let output = Command::new("sh").arg("-c").arg(command).output();
let content = match output {
Ok(output) => match String::from_utf8(output.stdout) {
Ok(s) => s,
Err(e) => format!("UTF-8 decode error: {}", e),
},
Err(e) => format!("Command failed: {}", e),
};
Self {
name,
content,
read_only: true,
state: BufferState::Unmodified,
ephemeral: true,
}
}
}
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