rootftp 0.3.0

A simple FTP server tool that allows you to play with files. Multiple users can share their files with each other. You can also build custom plugins see examples for more info.
Documentation 
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use anyhow::{Context, Result};
use config::Config;
use directories::ProjectDirs;
use reqwest::Client;
use serde::Deserialize;
use std::collections::HashMap;
use std::{fs, path::Path};
use tokio::fs as async_fs;

use crate::config;

#[derive(Deserialize)]
struct Content {
    name: String,
    #[serde(rename = "type")]
    kind: String,
    download_url: Option<String>,
}

pub async fn load_plugins(deb: bool) -> Result<()> {
    let url = "https://api.github.com/repos/rajeev-k47/rootftp/contents/plugin_library";
    let client = Client::new();

    let resp = client
        .get(url)
        .header("User-Agent", "plugin-fetcher")
        .send()
        .await
        .with_context(|| format!("Failed to fetch plugin list"))?;

    let entries: Vec<Content> = resp.json().await.with_context(|| "Failed to parse")?;

    if deb {
        println!("Loading plugins :");
    }
    let plugins: HashMap<String, String> = entries
        .into_iter()
        .filter(|e| e.kind == "file" && e.name.ends_with(".so"))
        .map(|e| {
            let name = e.name.to_string();
            let url = e.download_url.unwrap_or_default();
            if deb {
                println!("{}", name);
            }
            return (name, url);
        })
        .collect();

    if let Some(proj_dirs) = ProjectDirs::from("net", "runner", "rootftp") {
        let config_dir = proj_dirs.config_dir();
        fs::create_dir_all(config_dir).unwrap();
        let config_path = config_dir.join("plugins.json");
        fs::write(config_path, serde_json::to_string_pretty(&plugins)?)?;
    }

    Ok(())
}

pub async fn install_plugin(_name: &str) -> Result<()> {
    if let Some(proj_dirs) = ProjectDirs::from("net", "runner", "rootftp") {
        let config_dir = proj_dirs.config_dir();
        let config_path = config_dir.join("plugins.json");
        let plugin_dir = Config::load().root_dir.join("plugins");

        match read_plugins(&config_path.to_string_lossy()) {
            Ok(plugins) => {
                let mut found = false;
                for (name, url) in plugins {
                    if name == _name {
                        download_plugin(_name, &url, &plugin_dir).await?;
                        found = true;
                    }
                }
                if !found {
                    println!("\nPlugin does not exist.\n");
                    list_plugins().await;
                }
            }
            Err(err) => {
                eprintln!("Failed to install plugin: {}", err);
            }
        }
    }
    Ok(())
}
pub async fn list_plugins() {
    if let Some(proj_dirs) = ProjectDirs::from("net", "runner", "rootftp") {
        let config_dir = proj_dirs.config_dir();
        let config_path = config_dir.join("plugins.json");

        match read_plugins(&config_path.to_string_lossy()) {
            Ok(plugins) => {
                println!("Current available plugins :");
                for (name, _) in plugins {
                    println!("{}", name);
                }
                println!("\nUse <rootftp fetch> to sync plugins with plugin library");
            }
            Err(err) => {
                eprintln!("Error : {}", err);
            }
        }
    }
}

fn read_plugins(path: &str) -> Result<HashMap<String, String>> {
    let content = fs::read_to_string(path)?;
    let plugins: HashMap<String, String> = serde_json::from_str(&content)?;
    Ok(plugins)
}

pub async fn download_plugin(name: &str, url: &str, plugin_dir: &Path) -> Result<()> {
    let dest_path = plugin_dir.join(name);

    let client = Client::new();
    let response = client
        .get(url)
        .header("User-Agent", "plugin-downloader")
        .send()
        .await
        .context("Exception download")?
        .bytes()
        .await
        .context("Exception download")?;

    async_fs::write(&dest_path, &response)
        .await
        .with_context(|| "Failed to save plugin to")?;

    println!("Plugin installed {}", name);
    Ok(())
}