From c1f5a733c991abc8575832a8280ef683127e2e5c Mon Sep 17 00:00:00 2001
From: Matan Kushner <hello@matchai.me>
Date: Thu, 11 Apr 2019 19:31:30 -0400
Subject: [PATCH] More progress in Node section

---
 src/modules/directory.rs | 21 +++++++++++++--------
 src/modules/mod.rs       |  3 +++
 src/modules/nodejs.rs    | 33 ++++++++++++++++++++++++++++-----
 src/print.rs             |  8 ++++++--
 4 files changed, 50 insertions(+), 15 deletions(-)

diff --git a/src/modules/directory.rs b/src/modules/directory.rs
index 20dcae3d..bb957708 100644
--- a/src/modules/directory.rs
+++ b/src/modules/directory.rs
@@ -1,18 +1,18 @@
 use super::Segment;
-use std::env;
-use std::path::PathBuf;
 use ansi_term::{Color, Style};
 use clap::ArgMatches;
 use dirs;
 use git2::Repository;
+use std::env;
+use std::path::PathBuf;
 
 /// Creates a segment with the current directory
-/// 
+///
 /// Will perform path contraction and truncation.
 /// **Contraction**
 ///     - Paths begining with the home directory will be contracted to `~`
 ///     - Paths containing a git repo will contract to begin at the repo root
-/// 
+///
 /// **Truncation**
 /// Paths will be limited in length to `3` path components by default.
 pub fn segment(_: &ArgMatches) -> Segment {
@@ -21,8 +21,7 @@ pub fn segment(_: &ArgMatches) -> Segment {
     const HOME_SYMBOL: &str = "~";
 
     // TODO: Currently gets the physical directory. Get the logical directory.
-    let current_path = env::current_dir()
-        .expect("Unable to identify current directory");
+    let current_path = env::current_dir().expect("Unable to identify current directory");
 
     let dir_string;
     if let Ok(repo) = git2::Repository::discover(&current_path) {
@@ -66,7 +65,11 @@ fn get_repo_root(repo: Repository) -> PathBuf {
 }
 
 /// Contract the root component of a path
-fn contract_path(full_path: &PathBuf, top_level_path: &PathBuf, top_level_replacement: &str) -> String {
+fn contract_path(
+    full_path: &PathBuf,
+    top_level_path: &PathBuf,
+    top_level_replacement: &str,
+) -> String {
     if !full_path.starts_with(top_level_path) {
         return full_path.to_str().unwrap().to_string();
     }
@@ -96,7 +99,9 @@ fn truncate(dir_string: String, length: usize) -> String {
         return dir_string;
     }
 
-    let components = dir_string.split(std::path::MAIN_SEPARATOR).collect::<Vec<&str>>();
+    let components = dir_string
+        .split(std::path::MAIN_SEPARATOR)
+        .collect::<Vec<&str>>();
     if components.len() < length {
         return dir_string;
     }
diff --git a/src/modules/mod.rs b/src/modules/mod.rs
index a51904dd..5fa37593 100644
--- a/src/modules/mod.rs
+++ b/src/modules/mod.rs
@@ -6,6 +6,9 @@ mod nodejs;
 use ansi_term::Style;
 use clap::ArgMatches;
 
+// pub static current_dir: PathBuf = env::current_dir().expect("Unable to identify current directory");
+// TODO: Currently gets the physical directory. Get the logical directory.
+
 pub struct Segment {
     pub style: Style,
     pub value: String,
diff --git a/src/modules/nodejs.rs b/src/modules/nodejs.rs
index 16e76841..3c362f5d 100644
--- a/src/modules/nodejs.rs
+++ b/src/modules/nodejs.rs
@@ -1,17 +1,27 @@
 use super::Segment;
-use std::process::Command;
 use ansi_term::{Color, Style};
 use clap::ArgMatches;
+use std::env;
+use std::fs::{self, DirEntry};
+use std::process::Command;
 
 /// Creates a segment with the current Node.js version
-pub fn segment(args: &ArgMatches) -> Segment {
+pub fn segment(_: &ArgMatches) -> Segment {
     const NODE_CHAR: &str = "⬢ ";
     const SECTION_COLOR: Color = Color::Green;
 
+    let current_path = env::current_dir().expect("Unable to identify current directory");
+    let files = fs::read_dir(&current_path).unwrap();
+
+    let is_js_project = files.filter_map(Result::ok).any(has_js_files);
+
+    if is_js_project {
+        return Segment::default();
+    }
+
     let version = match Command::new("node").arg("--version").output() {
-        Ok(output) => String::from_utf8(output.stdout).unwrap(),
-        Err(e) => {
-            println!("{:?}", e);
+        Ok(output) => String::from_utf8(output.stdout).unwrap().trim().to_string(),
+        Err(_) => {
             return Segment::default();
         }
     };
@@ -23,6 +33,19 @@ pub fn segment(args: &ArgMatches) -> Segment {
     }
 }
 
+fn has_js_files(dir_entry: DirEntry) -> bool {
+    let is_js_file =
+        |d: &DirEntry| d.path().is_file() && d.path().extension().unwrap_or_default() == "js";
+    let is_node_modules = |d: &DirEntry| {
+        d.path().is_dir() && d.path().file_name().unwrap_or_default() == "node_modules"
+    };
+    let is_package_json = |d: &DirEntry| {
+        d.path().is_file() && d.path().file_name().unwrap_or_default() == "package.json"
+    };
+
+    is_js_file(&dir_entry) || is_node_modules(&dir_entry) || is_package_json(&dir_entry)
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/src/print.rs b/src/print.rs
index 4251a720..4371c5ec 100644
--- a/src/print.rs
+++ b/src/print.rs
@@ -1,5 +1,5 @@
-use std::io::{self, Write};
 use clap::ArgMatches;
+use std::io::{self, Write};
 
 use crate::modules;
 use crate::modules::Segment;
@@ -7,12 +7,16 @@ use crate::modules::Segment;
 pub fn prompt(args: ArgMatches) {
     let default_prompt = vec!["directory", "node", "line_break", "character"];
 
+    // TODO:
+    // - List files in directory
+    // - Index binaries in PATH
+
     let stdout = io::stdout();
     let mut handle = stdout.lock();
 
     // Write a new line before the prompt
     write!(handle, "{}", "\n").unwrap();
-    
+
     default_prompt
         .into_iter()
         .map(|module| modules::handle(module, &args))