feat(plugins): Plugin workers and strider (#2449)

* mvp of strider fuzzy find

* improve search ui

* various refactoringz

* moar refactoring

* even more refactoring

* tests and more refactoring

* refactor: remove unused stuff

* style(fmt): rustfmt

* debug ci

* debug ci

* correct path for plugin system tests

* fix plugin system ci tests

* remove debugging statements from test

* fix plugin worker persistence

* add test for plugin worker persistence

* style(fmt): rustfmt

* final cleanups

* remove outdated comments

9 files changed, 13 insertions, 0 deletions

diff --git a/zellij-utils/Cargo.toml b/zellij-utils/Cargo.toml
index 95f8b82aa..f12d8c78e 100644
--- a/zellij-utils/Cargo.toml
+++ b/zellij-utils/Cargo.toml
@@ -39,6 +39,7 @@ regex = "1.5.5"
 tempfile = "3.2.0"
 kdl = { version = "4.5.0", features = ["span"] }
 shellexpand = "3.0.0"
+uuid = { version = "0.8.2", features = ["serde", "v4"] }
 
 #[cfg(not(target_family = "wasm"))]
 [target.'cfg(not(target_family = "wasm"))'.dependencies]
diff --git a/zellij-utils/assets/plugins/compact-bar.wasm b/zellij-utils/assets/plugins/compact-bar.wasm
index d59cb92b8..3145fe1da 100755
--- a/zellij-utils/assets/plugins/compact-bar.wasm
+++ b/zellij-utils/assets/plugins/compact-bar.wasm
diff --git a/zellij-utils/assets/plugins/fixture-plugin-for-tests.wasm b/zellij-utils/assets/plugins/fixture-plugin-for-tests.wasm
new file mode 100755
index 000000000..a5421d720
--- /dev/null
+++ b/zellij-utils/assets/plugins/fixture-plugin-for-tests.wasm
diff --git a/zellij-utils/assets/plugins/status-bar.wasm b/zellij-utils/assets/plugins/status-bar.wasm
index 63907aed5..8f7ed7826 100755
--- a/zellij-utils/assets/plugins/status-bar.wasm
+++ b/zellij-utils/assets/plugins/status-bar.wasm
diff --git a/zellij-utils/assets/plugins/strider.wasm b/zellij-utils/assets/plugins/strider.wasm
index 39909aaa4..929f5e8c7 100755
--- a/zellij-utils/assets/plugins/strider.wasm
+++ b/zellij-utils/assets/plugins/strider.wasm
diff --git a/zellij-utils/assets/plugins/tab-bar.wasm b/zellij-utils/assets/plugins/tab-bar.wasm
index 5f59fe4fe..a8742f676 100755
--- a/zellij-utils/assets/plugins/tab-bar.wasm
+++ b/zellij-utils/assets/plugins/tab-bar.wasm
diff --git a/zellij-utils/src/consts.rs b/zellij-utils/src/consts.rs
index b851b1524..047cf9862 100644
--- a/zellij-utils/src/consts.rs
+++ b/zellij-utils/src/consts.rs
@@ -5,6 +5,7 @@ use directories_next::ProjectDirs;
 use lazy_static::lazy_static;
 use once_cell::sync::OnceCell;
 use std::path::PathBuf;
+use uuid::Uuid;
 
 pub const ZELLIJ_CONFIG_FILE_ENV: &str = "ZELLIJ_CONFIG_FILE";
 pub const ZELLIJ_CONFIG_DIR_ENV: &str = "ZELLIJ_CONFIG_DIR";
@@ -29,6 +30,10 @@ lazy_static! {
     pub static ref ZELLIJ_PROJ_DIR: ProjectDirs =
         ProjectDirs::from("org", "Zellij Contributors", "Zellij").unwrap();
     pub static ref ZELLIJ_CACHE_DIR: PathBuf = ZELLIJ_PROJ_DIR.cache_dir().to_path_buf();
+    pub static ref ZELLIJ_SESSION_CACHE_DIR: PathBuf = ZELLIJ_PROJ_DIR
+        .cache_dir()
+        .to_path_buf()
+        .join(format!("{}", Uuid::new_v4()));
     pub static ref ZELLIJ_DEFAULT_THEMES: Themes = {
         let mut default_themes = Themes::default();
 
diff --git a/zellij-utils/src/data.rs b/zellij-utils/src/data.rs
index 6da375f51..285532cc3 100644
--- a/zellij-utils/src/data.rs
+++ b/zellij-utils/src/data.rs
@@ -469,6 +469,10 @@ pub enum Event {
     SystemClipboardFailure,
     InputReceived,
     Visible(bool),
+    CustomMessage(
+        String, // message
+        String, // payload
+    ),
 }
 
 /// Describes the different input modes, which change the way that keystrokes will be interpreted.
diff --git a/zellij-utils/src/errors.rs b/zellij-utils/src/errors.rs
index 8b49112b9..74395e57a 100644
--- a/zellij-utils/src/errors.rs
+++ b/zellij-utils/src/errors.rs
@@ -365,6 +365,9 @@ pub enum PluginContext {
     RemoveClient,
     NewTab,
     ApplyCachedEvents,
+    ApplyCachedWorkerMessages,
+    PostMessageToPluginWorker,
+    PostMessageToPlugin,
 }
 
 /// Stack call representations corresponding to the different types of [`ClientInstruction`]s.