feat(main): add txt output

src/main.rs

@@ -1,50 +1,117 @@
-use std::{fs, process::exit};
+use std::{fs::{self, File}, io::Write, process::exit};
 
+use anyhow::{Error, Result};
 use clap::Parser;
 use dialoguer::MultiSelect;
 use once_cell::sync::Lazy;
-use anyhow::{Error, Result};
-use rayon::{iter::ParallelIterator, str::ParallelString};
+use rayon::{
+    iter::{IntoParallelIterator, ParallelIterator},
+    str::ParallelString,
+};
 use regex::Regex;
 
 /// Simple program to greet a person
 #[derive(Parser, Debug)]
 #[command(version, about, long_about = None)]
 struct Args {
-    #[arg(short, long, help="Path to log file")]
-    path: String,
+    #[arg(short, long, help = "Path to log file")]
+    input: String,
 
+    #[arg(
+        short,
+        long,
+        help = "Format of output file",
+        default_value_t,
+        value_enum
+    )]
+    format: OutputFormat,
+
+    #[arg(short, long, help = "Path to output  file")]
+    output: String,
 }
 
+#[derive(clap::ValueEnum, Debug, Clone, Default)]
+enum OutputFormat {
+    Image,
+    CSV,
+    #[default]
+    TXT,
+}
 
 /// follow up by extracting just the user and the message
-static SECOND_RE: Lazy<Regex> = Lazy::new(|| Regex::new(r"<.*> .*").unwrap());
+static EXTRACT_MSG: Lazy<Regex> = Lazy::new(|| Regex::new(r"<.*> .*").unwrap());
+static EXTRACT_TIME: Lazy<Regex> = Lazy::new(|| Regex::new(r"^\[.*?\]").unwrap());
 
 fn main() -> Result<()> {
     let args = Args::parse();
 
-    if !fs::exists(&args.path)? {
+    if !fs::exists(&args.input)? {
         println!("Please provide a valid file path!");
         exit(1)
     }
 
-    let log_contents = fs::read_to_string(args.path)?;
+    let log_contents = fs::read_to_string(&args.input)?;
 
     let split_log = log_contents.par_split('\n');
 
     let filtered_log: Vec<&str> = split_log.filter(|x| is_possible_chat_msg(x)).collect();
 
-    let selection = MultiSelect::new().with_prompt("What messages do you want to render?").items(&filtered_log).interact()?;
+    let extracted: Vec<String> = filtered_log
+        .clone()
+        .into_par_iter()
+        .map(|x| {
+            format!(
+                "{} {}",
+                EXTRACT_TIME
+                    .captures(x)
+                    .expect("Unable to extract time")
+                    .get(0)
+                    .unwrap()
+                    .as_str(),
+                EXTRACT_MSG
+                    .captures(x)
+                    .expect("Unable to extract message")
+                    .get(0)
+                    .unwrap()
+                    .as_str()
+            )
+        })
+        .collect();
 
+    let selection = MultiSelect::new()
+        .with_prompt("What messages do you want to render?")
+        .items(&extracted)
+        .interact()?;
     
+    match &args.format {
+        OutputFormat::Image => todo!(),
+        OutputFormat::CSV => todo!(),
+        OutputFormat::TXT => save_txt_file(&args.output, extracted, selection)?,
+    }
 
     Ok(())
 }
 
+fn save_txt_file(output: &String, extracted: Vec<String>, selection: Vec<usize>) -> Result<(), Error> {
+    let mut out_file = File::create(output)?;
+    Ok(for msg in selection {
+        out_file.write(extracted[msg].as_bytes())?;
+        out_file.write(b"\n")?;
+    })
+}
+
 fn is_possible_chat_msg(input: &str) -> bool {
     /// first pass to find all possible lines that could have a chat message
-    static SERVER_MSG_RE: Lazy<Regex> = Lazy::new(|| Regex::new(r"\[.*\] \[Server thread\/INFO\] \[net.minecraft.server.MinecraftServer\/\]: <.*>*").unwrap());
-    static CLIENT_MSG_RE: Lazy<Regex> = Lazy::new(|| Regex::new(r"\[.*\] \[Render thread\/INFO\] \[minecraft\/ChatComponent\]: \[CHAT\] <.*>*").unwrap());
+    static SERVER_MSG_RE: Lazy<Regex> = Lazy::new(|| {
+        Regex::new(
+            r"\[.*\] \[Server thread\/INFO\] \[net.minecraft.server.MinecraftServer\/\]: <.*>*",
+        )
+        .unwrap()
+    });
+    static CLIENT_MSG_RE: Lazy<Regex> = Lazy::new(|| {
+        Regex::new(r"\[.*\] \[Render thread\/INFO\] \[minecraft\/ChatComponent\]: \[CHAT\] <.*>*")
+            .unwrap()
+    });
 
     return SERVER_MSG_RE.is_match(input) || CLIENT_MSG_RE.is_match(input);
-}
+}