feat: introduce rules (#10)

* feat: introduce rules

* docs: rules example

README.md

@@ -34,11 +34,20 @@ You can configure state, details and git integration by changing Discord Presenc
         // URL for small image
         "small_image": "{base_icons_url}/zed.png",
         "small_text": "Zed",
+
+        // Rules - disable presence in some workspaces
+        "rules": {
+          "mode": "blacklist" // or whitelist
+          "paths": [
+            "absolute path"
+          ]
+        },
+
         "git_integration": true
       }
     }
   }
 }
 ```
 
-You can also use `null` to unset the option. Possible for everything except `base_icons_url` and `git_integration`
+You can also use `null` to unset the option. Possible for everything except `base_icons_url`, `rules` and `git_integration`

lsp/src/configuration.rs

@@ -19,6 +19,39 @@
 
 use serde_json::Value;
 
+#[derive(Debug, PartialEq)]
+pub enum RulesMode {
+    Whitelist,
+    Blacklist,
+}
+
+#[derive(Debug)]
+pub struct Rules {
+    pub mode: RulesMode,
+    pub paths: Vec<String>,
+}
+
+impl Default for Rules {
+    fn default() -> Self {
+        Rules {
+            mode: RulesMode::Blacklist,
+            paths: Vec::new(),
+        }
+    }
+}
+
+impl Rules {
+    pub fn suitable(&self, path: &str) -> bool {
+        let contains = self.paths.contains(&path.to_string());
+
+        if self.mode == RulesMode::Blacklist {
+            !contains
+        } else {
+            contains
+        }
+    }
+}
+
 #[derive(Debug)]
 pub struct Configuration {
     pub base_icons_url: String,
@@ -31,6 +64,8 @@ pub struct Configuration {
     pub small_image: Option<String>,
     pub small_text: Option<String>,
 
+    pub rules: Rules,
+
     pub git_integration: bool,
 }
 
@@ -66,6 +101,7 @@ impl Configuration {
             large_text: Some(String::from("{language:u}")),
             small_image: Some(String::from("{base_icons_url}/zed.png")),
             small_text: Some(String::from("Zed")),
+            rules: Rules::default(),
             git_integration: true,
         }
     }
@@ -80,6 +116,28 @@ impl Configuration {
             set_option!(self, options, small_image, "small_image");
             set_option!(self, options, small_text, "small_text");
 
+            if let Some(rules) = options.get("rules") {
+                self.rules.mode = rules.get("mode").and_then(|m| m.as_str()).map_or(
+                    RulesMode::Blacklist,
+                    |mode| match mode {
+                        "whitelist" => RulesMode::Whitelist,
+                        "blacklist" => RulesMode::Blacklist,
+                        _ => RulesMode::Blacklist,
+                    },
+                );
+
+                self.rules.paths =
+                    rules
+                        .get("paths")
+                        .and_then(|p| p.as_array())
+                        .map_or(Vec::new(), |paths| {
+                            paths
+                                .iter()
+                                .filter_map(|p| p.as_str().map(|s| s.to_string()))
+                                .collect()
+                        });
+            }
+
             if let Some(git_integration) = options.get("git_integration") {
                 self.git_integration = git_integration.as_bool().unwrap_or(true);
             }

lsp/src/main.rs

@@ -21,6 +21,7 @@ use std::ffi::OsStr;
 use std::fmt::Debug;
 use std::ops::Deref;
 use std::path::{Path, PathBuf};
+use std::process::exit;
 use std::sync::{Mutex, MutexGuard};
 
 use configuration::Configuration;
@@ -155,9 +156,6 @@ impl Backend {
 #[tower_lsp::async_trait]
 impl LanguageServer for Backend {
     async fn initialize(&self, params: InitializeParams) -> Result<InitializeResult> {
-        // Connect discord client
-        self.discord.connect();
-
         // Set workspace name
         let root_uri = params.root_uri.expect("Failed to get root uri");
         let workspace_path = Path::new(root_uri.path());
@@ -178,6 +176,18 @@ impl LanguageServer for Backend {
         let mut config = self.config.lock().unwrap();
         config.set(params.initialization_options);
 
+        if config.rules.suitable(
+            workspace_path
+                .to_str()
+                .expect("Failed to transform workspace path to str"),
+        ) {
+            // Connect discord client
+            self.discord.connect();
+        } else {
+            // Exit LSP
+            exit(0);
+        }
+
         Ok(InitializeResult {
             server_info: Some(ServerInfo {
                 name: env!("CARGO_PKG_NAME").into(),