feat(camera-app): Snapshot will get saved in the ~/Pictures directory.

[namana-mecha]

Objective

Fixes #177

Solution

• After taking the photo the app will save the photo in the ~/Pictures directory.
• Pictures are saved in the format Snapshot_Ymd_HMS.jpg

Showcase

• We get the local time using the chrono crate and the use the format function to correctly name the file.
• We get the home directory using the environment variable HOME and create a Pictures directory in the home folder if it doesn't exist.
• Then save the snapshot with the filename in the pictures directory.

The following code is added to contexts::camera::save_frame()

Click to view code

let now = chrono::Local::now();
let formatted_time = now.format("%Y%m%d_%H%M%S").to_string();
let mut pictures_dir = std::path::PathBuf::from(
    std::env::var("HOME").unwrap_or_else(|_| "/tmp".to_string()),
);
pictures_dir.push("Pictures");

if !pictures_dir.exists() {
    std::fs::create_dir_all(&pictures_dir)
        .expect("Couldn't create directory `Pictures`");
}

let filename = format!("Snapshot_{}.jpg", formatted_time);
let filepath = pictures_dir.join(&filename);
frame.save(filepath).unwrap();