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use std::io;
use std::io::{StdinLock, Stdout, Write};
use std::path::Path;
use arc_interner::ArcIntern;
use byteorder::ReadBytesExt;
use termion::input::TermRead;
use termion::raw::{IntoRawMode, RawTerminal};
use crate::descriptor::{load_descriptor, Descriptor, SourceDescriptor};
use crate::labelling::State::{Excluded, Labelled, Split};
use crate::labelling::{
load_labelling_rules, save_labelling_rules, GlobRule, Label, LabellingRules, State,
};
use crate::tree::{scan, FileTree, FileTree1};
use anyhow::{anyhow, bail};
pub fn interactive_label_node(
path: String,
current_state: Option<State>,
node: &mut FileTree1<Option<State>>,
labels: &Vec<Label>,
rules: &mut LabellingRules,
stdin: &mut StdinLock,
stdout: &mut RawTerminal<Stdout>,
) -> anyhow::Result<()> {
let mut next_state = current_state;
if let Some(rule_state) = rules.apply(&path) {
next_state = Some(rule_state.clone());
} else if !next_state
.as_ref()
.map(|s| s.should_inherit())
.unwrap_or(false)
{
if node.is_dir() {
stdout.write_all(format!("\r{}/: _", path).as_bytes())?;
} else if node.is_symlink() {
stdout.write_all(format!("\r{} (symlink): _", path).as_bytes())?;
} else {
stdout.write_all(format!("\r{}: _", path).as_bytes())?;
}
stdout.flush()?;
let user_input_state = loop {
let next_char = stdin.read_u8()? as char;
if next_char >= '1' && next_char <= '9' {
let index = next_char as usize - '1' as usize;
if let Some(label) = labels.get(index) {
rules
.position_based_rules
.insert(path.clone(), Labelled(label.clone()));
print!("\x08{}\r\n", label.0);
break Some(Labelled(label.clone()));
}
} else if next_char == 'x' {
rules.position_based_rules.insert(path.clone(), Excluded);
print!("\x08{}\r\n", next_char);
break Some(Excluded);
} else if next_char == 's' {
if node.is_dir() {
rules.position_based_rules.insert(path.clone(), Split);
print!("\x08{}\r\n", next_char);
break Some(Split);
} else {
print!("\x08!");
stdout.flush()?;
}
} else if next_char == 'p' {
print!("\x08p\r\n\tPattern mode. Choose a label or other effect to apply to the pattern matches: _");
stdout.flush()?;
let rule_apply_state = loop {
let next_char = stdin.read_u8()? as char;
if next_char >= '1' && next_char <= '9' {
let index = next_char as usize - '1' as usize;
if let Some(label) = labels.get(index) {
print!("\x08{}\r\n", label.0);
break Labelled(label.clone());
}
} else if next_char == 'x' {
print!("\x08{}\r\n", next_char);
break Excluded;
} else if next_char == 's' {
print!("\x08{}\r\n", next_char);
break Split;
}
};
stdout.flush()?;
stdout.suspend_raw_mode()?;
print!("\tEnter a glob pattern to match on:\n\t");
stdout.flush()?;
let (pattern, glob) = loop {
let pattern = stdin
.read_line()?
.ok_or_else(|| anyhow!("EOT? when reading glob pattern"))?;
match glob::Pattern::new(&pattern) {
Ok(glob) => {
if !glob.matches(&path) {
println!("Doesn't match the path in question.");
continue;
}
break (pattern, glob);
}
Err(error) => {
println!("Error: {:?}. Try again.", error);
}
}
};
stdout.activate_raw_mode()?;
rules.glob_based_rules.push(GlobRule {
pattern,
glob,
outcome: rule_apply_state.clone(),
});
break Some(rule_apply_state);
}
};
next_state = user_input_state;
}
match node {
FileTree::NormalFile { meta, .. } => {
*meta = next_state;
}
FileTree::Directory { meta, children, .. } => {
*meta = next_state.clone();
for (child_name, child) in children.iter_mut() {
let child_path = format!("{}/{}", path, child_name);
interactive_label_node(
child_path,
next_state.clone(),
child,
labels,
rules,
stdin,
stdout,
)?;
}
}
FileTree::SymbolicLink { meta, .. } => {
*meta = next_state;
}
FileTree::Other(_) => {
panic!("Other() nodes shouldn't be present here.");
}
}
Ok(())
}
pub fn interactive_labelling_session(path: &Path, source_name: String) -> anyhow::Result<()> {
let descriptor: Descriptor = load_descriptor(path)?;
let source = descriptor
.source
.get(&source_name)
.ok_or_else(|| anyhow!("No source found by that name!"))?;
if let SourceDescriptor::DirectorySource {
hostname: _,
directory,
} = source
{
println!("Scanning source; this might take a little while...");
let mut dir_scan = scan(directory)?
.ok_or_else(|| anyhow!("Empty source."))?
.replace_meta(&None);
let mut rules = load_labelling_rules(path, &source_name)?;
let labels: Vec<Label> = descriptor
.labels
.iter()
.map(|label| Label(ArcIntern::new(label.clone())))
.collect();
println!("The following label mappings are available:");
for (idx, label) in labels.iter().enumerate() {
println!("\tFor {:?}, press {}!", label.0.as_ref(), idx + 1);
}
println!("\tTo split a directory, press 's'!");
println!("\tTo exclude an entry, press 'x'!");
println!("\tTo apply a pattern, press 'p'...");
let mut stdout = io::stdout().into_raw_mode().unwrap();
let stdin_unlocked = io::stdin();
let mut stdin = stdin_unlocked.lock();
interactive_label_node(
"".to_owned(),
None,
&mut dir_scan,
&labels,
&mut rules,
&mut stdin,
&mut stdout,
)?;
drop(stdout);
drop(stdin);
println!("\nLabelling completed!");
save_labelling_rules(path, &source_name, &rules)?;
} else {
bail!("Can't do interactive labelling on a non-directory source.");
}
Ok(())
}