feat: add change_temperature method

.gitignore

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+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "anyhow"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
+[[package]]
+name = "auto_wlgamma"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "dbus",
+]
+
+[[package]]
+name = "dbus"
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+dependencies = [
+ "libc",
+ "libdbus-sys",
+ "winapi",
+]
+
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+[[package]]
+name = "libdbus-sys"
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+ "pkg-config",
+]
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+[[package]]
+name = "pkg-config"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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Cargo.toml

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+[package]
+name = "auto_wlgamma"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+anyhow = "1.0.81"
+dbus = "0.9.7"

src/main.rs

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+use std::time::Duration;
+
+use dbus::{arg::Variant, blocking::Connection, Error};
+use anyhow::{anyhow, Result};
+
+fn change_temperature(temp: u16) -> Result<()> {
+    let conn = Connection::new_session()?;
+    let proxy = conn.with_proxy("rs.wl-gammarelay", "/", Duration::from_millis(5000));
+
+    let call_ret: Result<(), Error> = proxy.method_call(
+        "org.freedesktop.DBus.Properties", "Set", (
+            "rs.wl.gammarelay",
+            "Temperature",
+            Variant(temp)
+        )
+    );
+    call_ret.map_err(|_err| anyhow!("Failed to call dbus method"))
+}
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let _ = change_temperature(2500);
+
+    Ok(())
+}
+