commit 3b06c0851ff070865aaff850af429f46019c815c
Author: sreedev <sreedevpadmakumar@gmail.com>
Date:   Sat Dec 24 18:45:16 2022 -0500

    initial commit

diff --git a/.gitignore b/.gitignore
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+ "winapi",
+]
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+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..8da388c
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,16 @@
+[package]
+name = "deduplicator"
+version = "0.0.1"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+anyhow = "1.0.68"
+clap = { version = "4.0.32", features = ["derive"] }
+glob = "0.3.0"
+md5 = "0.7.0"
+sha256 = "1.1.1"
+sqlite = "0.30.3"
+thiserror = "1.0.38"
+tokio = { version = "1.23.0", features = ["full"] }
diff --git a/src/cli.rs b/src/cli.rs
new file mode 100644
index 0000000..74bde6c
--- /dev/null
+++ b/src/cli.rs
@@ -0,0 +1,16 @@
+use std::path::PathBuf;
+use clap::Parser;
+
+#[derive(Parser, Debug)]
+#[command(author, version, about, long_about = None)]
+pub struct App {
+    /// Filetypes to deduplicate (default = all)
+    #[arg(short, long)]
+    pub filetypes: Option<String>,
+    /// List duplcates without deleting (default = true)
+    #[arg(short, long)]
+    pub dry: bool,
+    /// Run Deduplicator on dir different from pwd
+    #[arg(long)]
+    pub dir: Option<PathBuf>
+}
diff --git a/src/database.rs b/src/database.rs
new file mode 100644
index 0000000..1032d8a
--- /dev/null
+++ b/src/database.rs
@@ -0,0 +1,71 @@
+use anyhow::{anyhow, Result};
+
+#[derive(Debug)]
+pub struct File {
+    pub path: String,
+    pub hash: String,
+}
+
+pub fn setup() -> Result<()> {
+    let connection = sqlite::open(":memory:")?;
+    let query = "CREATE TABLE files (file_identifier STRING, hash STRING)";
+    match connection.execute(query) {
+        Ok(_) => Ok(()),
+        Err(e) => Err(anyhow!("Database Setup Failed! {}", e)),
+    }
+}
+
+pub fn put(file: File) -> Result<()> {
+    let connection = sqlite::open(":memory:")?;
+    let query = format!(
+        "INSERT INTO files (file_identifier, hash) VALUES ({}, {})",
+        file.path, file.hash
+    );
+    let result = connection.execute(query)?;
+
+    Ok(result)
+}
+
+pub fn duplicate_hashes() -> Result<Vec<File>> {
+    let connection = sqlite::open(":memory:")?;
+    let query = format!(
+        " 
+            SELECT a.* FROM files a
+            JOIN (SELECT file_identifier, hash, COUNT(*)
+            FROM files 
+            GROUP BY hash
+            HAVING count(*) > 1 ) b
+            ON a.file_identifier = b.file_identifier
+            ORDER BY a.file_identifier
+        "
+    );
+    let result: Vec<File> = connection
+        .prepare(query)?
+        .into_iter()
+        .map(|row_result| row_result.unwrap())
+        .map(|row| {
+            let path = row.read::<&str, _>("file_identifier").to_string();
+            let hash = row.read::<&str, _>("hash").to_string();
+            File { path, hash }
+        })
+        .collect();
+
+    Ok(result)
+}
+
+pub fn lookup(hash: &str) -> Result<Vec<File>> {
+    let connection = sqlite::open(":memory:")?;
+    let result_set = connection
+        .prepare("SELECT * FROM files WHERE hash = ?")?
+        .into_iter()
+        .bind((1, hash))?
+        .map(|row| row.unwrap())
+        .map(|row| {
+            let path = row.read::<&str, _>("file_identifier").to_owned();
+            let hash = row.read::<&str, _>("hash").to_owned();
+            File { path, hash }
+        })
+        .collect::<Vec<File>>();
+
+    Ok(result_set)
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..2f33c5d
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,15 @@
+mod database;
+mod scanner;
+mod cli;
+
+use clap::Parser;
+use anyhow::Result;
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    database::setup()?;
+    let duplicates = scanner::duplicates(cli::App::parse())?;
+    dbg!(duplicates);
+
+    Ok(())
+}
diff --git a/src/scanner.rs b/src/scanner.rs
new file mode 100644
index 0000000..b13ddc1
--- /dev/null
+++ b/src/scanner.rs
@@ -0,0 +1,66 @@
+use std::path::PathBuf;
+
+use crate::{cli::App, database::File};
+use crate::database;
+use anyhow::Result;
+use glob::glob;
+use std::{fs, io};
+
+pub fn duplicates(app_opts: App) -> Result<Vec<File>> {
+    index_files(scan(app_opts)?);
+    database::duplicate_hashes()
+}
+
+fn scan(app_opts: App) -> Result<Vec<String>> {
+    let directory: String = app_opts
+        .dir
+        .unwrap_or(std::env::current_dir()?)
+        .as_os_str()
+        .to_str()
+        .unwrap()
+        .to_string();
+
+    let glob_patterns: Vec<PathBuf> = app_opts
+        .filetypes
+        .unwrap_or(String::from("*"))
+        .split(",")
+        .map(|filetype| format!("*.{}", filetype))
+        .map(|filetype| {
+            vec![directory.clone(), String::from("**"), filetype]
+                .iter()
+                .collect()
+        })
+        .collect();
+
+    let files: Vec<String> = glob_patterns
+        .into_iter()
+        .map(|glob_pattern| glob(&glob_pattern.as_os_str().to_str().unwrap()))
+        .map(|glob_result| glob_result.unwrap())
+        .flat_map(|file_vec| {
+            file_vec
+                .map(|x| x.unwrap().as_os_str().to_str().unwrap().to_string())
+                .collect::<Vec<String>>()
+        })
+        .collect();
+
+    Ok(files)
+}
+
+fn index_files(files: Vec<String>) {
+    files
+        .into_iter()
+        .map(|file| {
+            let hash = hash_file(&file).unwrap();
+            database::File { path: file, hash }
+        })
+        .for_each(|file| {
+            database::put(file).unwrap();
+        });
+}
+
+pub fn hash_file(filepath: &str) -> Result<String> {
+    let file = fs::read(filepath)?;
+    let hash = sha256::digest(&*file);
+
+    Ok(hash)
+}
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