token count now adapts to chosen provider tokenizer

app/MindWork AI Studio/Components/ChatComponent.razor.cs

@@ -994,6 +994,16 @@ public partial class ChatComponent : MSGComponentBase, IAsyncDisposable
             this.tokenCount = "0";
             return;
         }
+
+        var tokenizerResponse = await this.RustService.EnsureTokenizer(this.Provider);
+        if (tokenizerResponse is null)
+            return;
+        if (!tokenizerResponse.Value.Success)
+        {
+            this.Logger.LogWarning($"Failed to initialize the tokenizer for the provider: {tokenizerResponse.Value.Message}");
+            return;
+        }
+
         var response = await this.RustService.GetTokenCount(this.inputField.Value);
         if (response is null)
             return;

app/MindWork AI Studio/Dialogs/EmbeddingProviderDialog.razor.cs

@@ -243,7 +243,7 @@ public partial class EmbeddingProviderDialog : MSGComponentBase, ISecretId
         if (!this.dataIsValid)
             return;
         
-        var response = await this.RustService.StoreTokenizer(this.DataName, this.dataEditingPreviousInstanceName, this.dataFilePath);
+        var response = await this.RustService.StoreTokenizer("embedding_"+this.DataName, "embedding_"+this.dataEditingPreviousInstanceName, this.dataFilePath);
         Console.WriteLine($"Response from Rust: {response.Message}");
         if (!response.Success)
         {

app/MindWork AI Studio/Dialogs/ProviderDialog.razor.cs

@@ -268,7 +268,7 @@ public partial class ProviderDialog : MSGComponentBase, ISecretId
         if (!this.dataIsValid)
             return;
 
-        var tokenizerResponse = await this.RustService.StoreTokenizer(this.DataInstanceName, this.dataEditingPreviousInstanceName, this.dataFilePath);
+        var tokenizerResponse = await this.RustService.StoreTokenizer("chat_"+this.DataInstanceName, "chat_"+this.dataEditingPreviousInstanceName, this.dataFilePath);
         if (!tokenizerResponse.Success)
         {
             this.dataCustomTokenizerValidationIssue = tokenizerResponse.Message;

app/MindWork AI Studio/Tools/Services/RustService.Tokenizer.cs

@@ -1,9 +1,14 @@
-using AIStudio.Tools.Rust;
+using AIStudio.Provider;
+using AIStudio.Tools.Rust;
 
 namespace AIStudio.Tools.Services;
 
 public sealed partial class RustService
 {
+    private readonly SemaphoreSlim tokenizerLock = new(1, 1);
+    private string currentTokenizerPath = string.Empty;
+    private bool hasInitializedTokenizer;
+
     public async Task<TokenizerResponse> ValidateTokenizer(string filePath)
     {
         var result = await this.http.PostAsJsonAsync("/tokenizer/validate", new {
@@ -66,4 +71,57 @@ public sealed partial class RustService
             return null;
         }
     }
-}
+
+    public async Task<TokenizerResponse?> SetTokenizer(string providerName, string path)
+    {
+        Console.WriteLine($"Setting a new tokenizer for '{providerName}'");
+        var result = await this.http.PostAsJsonAsync("/tokenizer/set", new {
+            file_path = path,
+        }, this.jsonRustSerializerOptions);
+
+        if (!result.IsSuccessStatusCode)
+        {
+            this.logger!.LogError($"Failed to set the tokenizer '{result.StatusCode}'");
+            return new TokenizerResponse{
+                Success = false,
+                Message = "An error occured while sending the path to the Rust framework for setting a tokenizer: "+result.StatusCode,
+                TokenCount = 0
+            };
+        }
+
+        return await result.Content.ReadFromJsonAsync<TokenizerResponse>(this.jsonRustSerializerOptions);
+    }
+
+    public Task<TokenizerResponse?> EnsureTokenizer(Settings.Provider provider)
+    {
+        return this.EnsureTokenizer(provider.InstanceName, provider.TokenizerPath);
+    }
+
+    public Task<TokenizerResponse?> EnsureTokenizer(IProvider provider)
+    {
+        return this.EnsureTokenizer(provider.InstanceName, provider.TokenizerPath);
+    }
+
+    private async Task<TokenizerResponse?> EnsureTokenizer(string providerName, string path)
+    {
+        await this.tokenizerLock.WaitAsync();
+        try
+        {
+            if (this.hasInitializedTokenizer && this.currentTokenizerPath == path)
+                return new TokenizerResponse(true, 0, "Success");
+
+            var response = await this.SetTokenizer(providerName, path);
+            if (response is { Success: true })
+            {
+                this.currentTokenizerPath = path;
+                this.hasInitializedTokenizer = true;
+            }
+
+            return response;
+        }
+        finally
+        {
+            this.tokenizerLock.Release();
+        }
+    }
+}

app/MindWork AI Studio/Tools/Services/RustService.cs

@@ -91,6 +91,7 @@ public sealed partial class RustService : BackgroundService
     {
         this.http.Dispose();
         this.userLanguageLock.Dispose();
+        this.tokenizerLock.Dispose();
         base.Dispose();
     }
 

runtime/src/app_window.rs

@@ -21,6 +21,7 @@ use crate::pdfium::PDFIUM_LIB_PATH;
 use crate::qdrant::{cleanup_qdrant, start_qdrant_server, stop_qdrant_server};
 #[cfg(debug_assertions)]
 use crate::dotnet::create_startup_env_file;
+use crate::tokenizer::set_path_resolver;
 
 /// The Tauri main window.
 static MAIN_WINDOW: Lazy<Mutex<Option<Window>>> = Lazy::new(|| Mutex::new(None));
@@ -117,6 +118,8 @@ pub fn start_tauri() {
             cleanup_qdrant();
             start_qdrant_server(app.path_resolver());
 
+            set_path_resolver(app.path_resolver());
+
             info!(Source = "Bootloader Tauri"; "Reconfigure the file logger to use the app data directory {data_path:?}");
             switch_to_file_logging(data_path).map_err(|e| error!("Failed to switch logging to file: {e}")).unwrap();
             set_pdfium_path(app.path_resolver());

runtime/src/main.rs

@@ -43,10 +43,6 @@ async fn main() {
         info!("Running in production mode.");
     }
 
-    if let Err(e) = init_tokenizer() {
-        warn!(Source = "Tokenizer"; "Error during the initialisation of the tokenizer: {}", e);
-    }
-
     generate_runtime_certificate();
     start_runtime_api();
     

runtime/src/runtime_api.rs

@@ -92,6 +92,7 @@ pub fn start_runtime_api() {
                 crate::tokenizer::token_count,
                 crate::tokenizer::validate_tokenizer,
                 crate::tokenizer::store_tokenizer,
+                crate::tokenizer::set_tokenizer,
                 crate::app_window::register_shortcut,
                 crate::app_window::validate_shortcut,
                 crate::app_window::suspend_shortcuts,

runtime/src/tokenizer.rs

@@ -1,16 +1,20 @@
-use std::fs;
-use std::path::{PathBuf};
-use std::sync::OnceLock;
-use rocket::{post};
+use std::fs;
+use std::path::PathBuf;
+use std::sync::{OnceLock, RwLock};
+use log::warn;
+use rocket::post;
 use rocket::serde::json::Json;
 use rocket::serde::Serialize;
 use serde::Deserialize;
+use tauri::PathResolver;
 use tokenizers::Error;
 use tokenizers::tokenizer::{Tokenizer, Error as TokenizerError};
 use crate::api_token::APIToken;
-use crate::environment::{DATA_DIRECTORY};
+use crate::environment::DATA_DIRECTORY;
 
-static TOKENIZER: OnceLock<Tokenizer> = OnceLock::new();
+static TOKENIZER: OnceLock<RwLock<Option<Tokenizer>>> = OnceLock::new();
+
+static TOKENIZER_PATH_RESOLVER: OnceLock<PathResolver> = OnceLock::new();
 
 #[derive(Deserialize)]
 pub struct SetTokenText {
@@ -25,7 +29,7 @@ pub struct TokenizerStorage {
 }
 
 #[derive(Clone, Deserialize)]
-pub struct TokenizerValidation {
+pub struct TokenizerPath {
     file_path: String,
 }
 
@@ -53,15 +57,36 @@ impl From<Result<usize, TokenizerError>> for TokenizerResponse {
     }
 }
 
-pub fn init_tokenizer() -> Result<(), Error>{
-    let mut target_dir = PathBuf::from("target");
-    target_dir.push("tokenizers");
-    fs::create_dir_all(&target_dir)?;
+pub fn set_path_resolver(path_resolver: PathResolver) {
+    match TOKENIZER_PATH_RESOLVER.set(path_resolver) {
+        Ok(_) => (),
+        Err(e) => warn!(Source = "Tokenizer"; "Could not set the path resolver: {:?}", e),
+    }
+}
 
-    let mut local_tokenizer_path = target_dir.clone();
-    local_tokenizer_path.push("tokenizer.json");
+fn tokenizer_state() -> &'static RwLock<Option<Tokenizer>> {
+    TOKENIZER.get_or_init(|| RwLock::new(None))
+}
+
+pub fn init_tokenizer(path: &str) -> Result<(), Error> {
+    let tokenizer_path = if path.trim().is_empty() {
+        let relative_source_path = String::from("resources/tokenizers/tokenizer.json");
+        let path_resolver = TOKENIZER_PATH_RESOLVER
+            .get()
+            .ok_or_else(|| Error::from("Tokenizer path resolver is not initialized"))?;
+        path_resolver
+            .resolve_resource(relative_source_path)
+            .ok_or_else(|| Error::from("Failed to resolve default tokenizer resource path"))?
+    } else {
+        PathBuf::from(path)
+    };
+
+    let tokenizer = Tokenizer::from_file(tokenizer_path)?;
+    let mut tokenizer_guard = tokenizer_state()
+        .write()
+        .map_err(|_| Error::from("Tokenizer state lock is poisoned"))?;
+    *tokenizer_guard = Some(tokenizer);
 
-    TOKENIZER.set(Tokenizer::from_file(local_tokenizer_path)?).expect("Could not set the tokenizer.");
     Ok(())
 }
 
@@ -93,13 +118,13 @@ fn validate_tokenizer_at_path(path: &PathBuf) -> Result<usize, TokenizerError> {
 
     if token_count == 0 {
         return Err(TokenizerError::from(
-            "Tokenizer produced 0 tokens for test string. The tokenizer is likely invalid or misconfigured."
+            "Tokenizer produced 0 tokens for test string. The tokenizer is likely invalid or misconfigured.",
         ));
     }
 
     if encoding.get_tokens().iter().any(|t| t.is_empty()) {
         return Err(TokenizerError::from(
-            "Tokenizer produced empty tokens. The tokenizer is invalid."
+            "Tokenizer produced empty tokens. The tokenizer is invalid.",
         ));
     }
 
@@ -113,41 +138,48 @@ fn handle_tokenizer_store(payload: &TokenizerStorage) -> Result<String, std::io:
 
     let base_path = PathBuf::from(data_dir).join("tokenizers");
 
-    // Delete previous model if file_path is empty
     if payload.file_path.trim().is_empty() {
         if payload.previous_model_id.trim().is_empty() {
-            return Ok(String::from("")); // Nothing to delete
+            return Ok(String::from(""));
         }
+
         let previous_path = base_path.join(&payload.previous_model_id);
         fs::remove_dir_all(previous_path)?;
         return Ok(String::from(""));
     }
 
-    // Copy file
     let source_path = PathBuf::from(&payload.file_path);
-    let source_name = source_path.file_name()
+    let source_name = source_path
+        .file_name()
         .and_then(|n| n.to_str())
         .ok_or_else(|| std::io::Error::new(std::io::ErrorKind::InvalidInput, "Invalid tokenizer file path"))?;
     let model_path = &base_path.join(&payload.model_id);
     let destination_path = &model_path.join(source_name);
-    println!("source_path: {}, destination_path: {}", source_path.display(), destination_path.display());
+    println!(
+        "source_path: {}, destination_path: {}",
+        source_path.display(),
+        destination_path.display()
+    );
     println!("equals {}", source_path.eq(destination_path));
 
     if !source_path.eq(destination_path) && model_path.exists() {
         fs::remove_dir_all(model_path)?;
     }
     fs::create_dir_all(model_path)?;
-    println!("Moving tokenizer file from {} to {}", source_path.display(), destination_path.display());
+    println!(
+        "Moving tokenizer file from {} to {}",
+        source_path.display(),
+        destination_path.display()
+    );
     let previous_path = base_path.join(&payload.previous_model_id);
 
-    // Delete previous tokenizer folder if specified
-    if !payload.previous_model_id.trim().is_empty() && source_path.starts_with(&previous_path){
+    if !payload.previous_model_id.trim().is_empty() && source_path.starts_with(&previous_path) {
         fs::rename(&source_path, &destination_path)?;
         if previous_path.exists() && !previous_path.eq(model_path) {
             fs::remove_dir_all(previous_path)?;
         }
-    }else{
-        fs::copy( & source_path, & destination_path)?;
+    } else {
+        fs::copy(&source_path, &destination_path)?;
     }
     Ok(destination_path.to_str().unwrap().to_string())
 }
@@ -157,7 +189,11 @@ pub fn get_token_count(text: &str) -> Result<usize, TokenizerError> {
         return Err(TokenizerError::from("Input text is empty"));
     }
 
-    let tokenizer = TOKENIZER.get().cloned().ok_or_else(|| TokenizerError::from("Tokenizer not initialized"))?;
+    let tokenizer = tokenizer_state()
+        .read()
+        .map_err(|_| TokenizerError::from("Tokenizer state lock is poisoned"))?
+        .clone()
+        .ok_or_else(|| TokenizerError::from("Tokenizer not initialized"))?;
     let enc = tokenizer.encode(text, true)?;
     Ok(enc.len())
 }
@@ -168,14 +204,17 @@ pub fn token_count(_token: APIToken, req: Json<SetTokenText>) -> Json<TokenizerR
 }
 
 #[post("/tokenizer/validate", data = "<payload>")]
-pub fn validate_tokenizer(_token: APIToken, payload: Json<TokenizerValidation>) -> Json<TokenizerResponse>{
+pub fn validate_tokenizer(_token: APIToken, payload: Json<TokenizerPath>) -> Json<TokenizerResponse> {
     println!("Received tokenizer validation request: {}", payload.file_path);
     Json(validate_tokenizer_at_path(&PathBuf::from(payload.file_path.clone())).into())
 }
 
 #[post("/tokenizer/store", data = "<payload>")]
-pub fn store_tokenizer(_token: APIToken, payload: Json<TokenizerStorage>) -> Json<TokenizerResponse>{
-    println!("Received tokenizer store request: {}, {}, {}", payload.model_id, payload.previous_model_id, payload.file_path);
+pub fn store_tokenizer(_token: APIToken, payload: Json<TokenizerStorage>) -> Json<TokenizerResponse> {
+    println!(
+        "Received tokenizer store request: {}, {}, {}",
+        payload.model_id, payload.previous_model_id, payload.file_path
+    );
     match handle_tokenizer_store(&payload) {
         Ok(dest_path) => Json(TokenizerResponse {
             success: true,
@@ -188,5 +227,20 @@ pub fn store_tokenizer(_token: APIToken, payload: Json<TokenizerStorage>) -> Jso
             message: e.to_string(),
         }),
     }
+}
 
-}
+#[post("/tokenizer/set", data = "<payload>")]
+pub fn set_tokenizer(_token: APIToken, payload: Json<TokenizerPath>) -> Json<TokenizerResponse> {
+    match init_tokenizer(&payload.file_path) {
+        Ok(_) => Json(TokenizerResponse {
+            success: true,
+            token_count: 0,
+            message: "Success".to_string(),
+        }),
+        Err(e) => Json(TokenizerResponse {
+            success: false,
+            token_count: 0,
+            message: e.to_string(),
+        }),
+    }
+}