Add ability to set the webhook url

Add help menu

src/main.rs

@@ -11,6 +11,13 @@ use std::path::PathBuf;
 mod discord;
 const MAXBUF: u64 = 8_380_416;
 
+const HELP: &[&str] = &[
+    concat!("dimgup-cli ", env!("CARGO_PKG_VERSION")),
+    "dimgup-cli config <webhook_url> - set webhook",
+    "dimgup-cli <file> - upload file to discord",
+    "dimgup-cli help - show this message",
+];
+
 macro_rules! loop_try {
     ($e:expr) => {
         match $e {
@@ -40,6 +47,16 @@ fn get_webhook(path: &Path) -> anyhow::Result<String> {
     Ok(std::fs::read_to_string(path)?)
 }
 
+fn set_webhook(webhook: &str) -> anyhow::Result<()> {
+    let proj_dirs = ProjectDirs::from("xyz", "karx", "dimgup-cli").unwrap();
+    let mut b = proj_dirs.config_dir().to_path_buf();
+    std::fs::create_dir_all(&b)?;
+    b.push("webhook");
+    let mut file = File::create(&b)?;
+    file.write_all(webhook.as_bytes())?;
+    Ok(())
+}
+
 fn get_file_info(path: &Path) -> anyhow::Result<(File, u64, String)> {
     let filename = path.file_name().unwrap().to_str().unwrap();
     let mut handle = File::open(path)?;
@@ -64,18 +81,26 @@ fn do_upload(mut file: File, size: u64, name: &str, webhook: &str) -> anyhow::Re
 }
 
 fn main() -> anyhow::Result<()> {
-    let conf = get_config_file();
-    let webhook = match get_webhook(&conf) {
-        Ok(w) => w,
-        Err(e) => bail!(
-            "No webhook added. Please put your discord webhook URL into {:#?}",
-            conf
-        ),
-    };
-
     let filename = std::env::args()
         .nth(1)
         .ok_or_else(|| anyhow!("No filename was provided"))?;
+    if filename == "config" {
+        let webhook = std::env::args()
+            .nth(2)
+            .ok_or_else(|| anyhow!("No webhook was provided"))?;
+        set_webhook(&webhook)?;
+        println!("Webhook set successfully");
+        return Ok(());
+    } else if filename == "help" {
+        println!("{}", HELP.join("\n"));
+        return Ok(());
+    }
+
+    let conf = get_config_file();
+    let webhook = match get_webhook(&conf) {
+        Ok(w) => w,
+        Err(_) => bail!("Please set your webhook. See --help for more info."),
+    };
     let filename = PathBuf::from(filename);
 
     let (handle, size, name) = get_file_info(&filename)?;