logancyang_obsidian-copilot/src/main.ts

import { BrevilabsClient } from "@/LLMProviders/brevilabsClient";
import ProjectManager from "@/LLMProviders/projectManager";
import { CustomModel, getCurrentProject } from "@/aiParams";
import { AutocompleteService } from "@/autocomplete/autocompleteService";
import { parseChatContent } from "@/chatUtils";
import { registerCommands } from "@/commands";
import CopilotView from "@/components/CopilotView";
import { APPLY_VIEW_TYPE, ApplyView } from "@/components/composer/ApplyView";
import { LoadChatHistoryModal } from "@/components/modals/LoadChatHistoryModal";

import { QUICK_COMMAND_CODE_BLOCK } from "@/commands/constants";
import { registerContextMenu } from "@/commands/contextMenu";
import { CustomCommandRegister } from "@/commands/customCommandRegister";
import { migrateCommands, suggestDefaultCommands } from "@/commands/migrator";
import { createQuickCommandContainer } from "@/components/QuickCommand";
import {
  ABORT_REASON,
  CHAT_VIEWTYPE,
  DEFAULT_OPEN_AREA,
  EVENT_NAMES,
  VAULT_VECTOR_STORE_STRATEGY,
} from "@/constants";
import { ChatManager } from "@/core/ChatManager";
import { MessageRepository } from "@/core/MessageRepository";
import { encryptAllKeys } from "@/encryptionService";
import { logInfo, logWarn } from "@/logger";
import { checkIsPlusUser } from "@/plusUtils";
import { MemoryIndexManager } from "@/search/v3/MemoryIndexManager";
import { TieredLexicalRetriever } from "@/search/v3/TieredLexicalRetriever";
import { CopilotSettingTab } from "@/settings/SettingsPage";
import {
  getModelKeyFromModel,
  getSettings,
  sanitizeSettings,
  setSettings,
  subscribeToSettingsChange,
} from "@/settings/model";
import { ChatUIState } from "@/state/ChatUIState";
import { FileParserManager } from "@/tools/FileParserManager";
import { initializeBuiltinTools } from "@/tools/builtinTools";
import {
  Editor,
  MarkdownView,
  Menu,
  Notice,
  Plugin,
  TFile,
  TFolder,
  WorkspaceLeaf,
} from "obsidian";
import { IntentAnalyzer } from "./LLMProviders/intentAnalyzer";

interface FileTrackingState {
  lastActiveFile: TFile | null;
  lastActiveMtime: number | null;
}

export default class CopilotPlugin extends Plugin {
  // Plugin components
  projectManager: ProjectManager;
  brevilabsClient: BrevilabsClient;
  userMessageHistory: string[] = [];
  fileParserManager: FileParserManager;
  customCommandRegister: CustomCommandRegister;
  settingsUnsubscriber?: () => void;
  private autocompleteService: AutocompleteService;
  chatUIState: ChatUIState;
  private fileTracker: FileTrackingState = { lastActiveFile: null, lastActiveMtime: null };

  async onload(): Promise<void> {
    await this.loadSettings();
    this.settingsUnsubscriber = subscribeToSettingsChange(async (prev, next) => {
      if (next.enableEncryption) {
        await this.saveData(await encryptAllKeys(next));
      } else {
        await this.saveData(next);
      }
      registerCommands(this, prev, next);
    });
    this.addSettingTab(new CopilotSettingTab(this.app, this));

    // Core plugin initialization

    // Initialize built-in tools with vault access
    initializeBuiltinTools(this.app.vault);

    // Initialize BrevilabsClient
    this.brevilabsClient = BrevilabsClient.getInstance();
    this.brevilabsClient.setPluginVersion(this.manifest.version);
    checkIsPlusUser();

    // Initialize ProjectManager
    this.projectManager = ProjectManager.getInstance(this.app, this);

    // Initialize FileParserManager early with other core services
    this.fileParserManager = new FileParserManager(this.brevilabsClient, this.app.vault);

    // Initialize ChatUIState with new architecture
    const messageRepo = new MessageRepository();
    const chainManager = this.projectManager.getCurrentChainManager();
    const chatManager = new ChatManager(messageRepo, chainManager, this.fileParserManager, this);
    this.chatUIState = new ChatUIState(chatManager);

    this.registerView(CHAT_VIEWTYPE, (leaf: WorkspaceLeaf) => new CopilotView(leaf, this));
    this.registerView(APPLY_VIEW_TYPE, (leaf: WorkspaceLeaf) => new ApplyView(leaf));

    this.initActiveLeafChangeHandler();

    this.addRibbonIcon("message-square", "Open Copilot Chat", (evt: MouseEvent) => {
      this.activateView();
    });

    registerCommands(this, undefined, getSettings());

    this.registerMarkdownCodeBlockProcessor(QUICK_COMMAND_CODE_BLOCK, (_, el) => {
      createQuickCommandContainer({
        plugin: this,
        element: el,
      });

      // Remove parent element class names to clear default code block styling
      if (el.parentElement) {
        el.parentElement.className = "";
      }
    });

    IntentAnalyzer.initTools(this.app.vault);

    // Auto-index per strategy when semantic toggle is enabled
    try {
      const settings = getSettings();
      const semanticOn = settings.enableSemanticSearchV3;
      if (semanticOn) {
        const strategy = settings.indexVaultToVectorStore;
        const isMobileDisabled = settings.disableIndexOnMobile && (this.app as any).isMobile;
        if (!isMobileDisabled && strategy === VAULT_VECTOR_STORE_STRATEGY.ON_STARTUP) {
          await MemoryIndexManager.getInstance(this.app).indexVaultIncremental();
          await MemoryIndexManager.getInstance(this.app).ensureLoaded();
        } else {
          const loaded = isMobileDisabled
            ? false
            : await MemoryIndexManager.getInstance(this.app).loadIfExists();
          if (!loaded) {
            logWarn("MemoryIndex: embedding index not found; falling back to full-text only");
            new Notice("embedding index doesn't exist, fall back to full-text search");
          }
        }
      } else {
        // If semantic is off, we still try to load index for features that depend on it
        if (!(settings.disableIndexOnMobile && (this.app as any).isMobile)) {
          await MemoryIndexManager.getInstance(this.app).loadIfExists();
        }
      }
    } catch {
      // Swallow errors to avoid disrupting startup
    }

    this.registerEvent(
      this.app.workspace.on("editor-menu", (menu: Menu) => {
        return registerContextMenu(menu);
      })
    );

    this.registerEvent(
      this.app.workspace.on("active-leaf-change", (leaf) => {
        if (leaf && leaf.view instanceof MarkdownView) {
          const file = leaf.view.file;
          if (file) {
            // On switching to a new file, opportunistically re-index the previous active file
            // if semantic search v3 is enabled and file was modified while active
            try {
              const settings = getSettings();
              if (settings.enableSemanticSearchV3) {
                const { lastActiveFile, lastActiveMtime } = this.fileTracker;
                if (
                  lastActiveFile &&
                  typeof lastActiveMtime === "number" &&
                  lastActiveFile.extension === "md"
                ) {
                  if (lastActiveFile.stat?.mtime && lastActiveFile.stat.mtime > lastActiveMtime) {
                    // Reindex only the last active file that changed
                    void MemoryIndexManager.getInstance(this.app).reindexSingleFileIfModified(
                      lastActiveFile,
                      lastActiveMtime
                    );
                  }
                }
                // update trackers
                this.fileTracker = {
                  lastActiveFile: file,
                  lastActiveMtime: file.stat?.mtime ?? null,
                };
              }
            } catch {
              // non-fatal: ignore indexing errors during active file switch
            }
            const activeCopilotView = this.app.workspace
              .getLeavesOfType(CHAT_VIEWTYPE)
              .find((leaf) => leaf.view instanceof CopilotView)?.view as CopilotView;

            if (activeCopilotView) {
              const event = new CustomEvent(EVENT_NAMES.ACTIVE_LEAF_CHANGE);
              activeCopilotView.eventTarget.dispatchEvent(event);
            }
          }
        }
      })
    );

    // Initialize autocomplete service
    this.autocompleteService = AutocompleteService.getInstance(this);
    this.customCommandRegister = new CustomCommandRegister(this, this.app.vault);
    this.app.workspace.onLayoutReady(() => {
      this.customCommandRegister.initialize().then(migrateCommands).then(suggestDefaultCommands);
    });
  }

  async onunload() {
    if (this.projectManager) {
      this.projectManager.onunload();
    }

    this.customCommandRegister.cleanup();
    this.settingsUnsubscriber?.();
    this.autocompleteService?.destroy();

    logInfo("Copilot plugin unloaded");
  }

  updateUserMessageHistory(newMessage: string) {
    this.userMessageHistory = [...this.userMessageHistory, newMessage];
  }

  async autosaveCurrentChat() {
    if (getSettings().autosaveChat) {
      const chatView = this.app.workspace.getLeavesOfType(CHAT_VIEWTYPE)[0]?.view as CopilotView;
      if (chatView) {
        await chatView.saveChat();
      }
    }
  }

  async processText(
    editor: Editor,
    eventType: string,
    eventSubtype?: string,
    checkSelectedText = true
  ) {
    const selectedText = await editor.getSelection();

    const isChatWindowActive = this.app.workspace.getLeavesOfType(CHAT_VIEWTYPE).length > 0;

    if (!isChatWindowActive) {
      await this.activateView();
    }

    // Without the timeout, the view is not yet active
    setTimeout(() => {
      const activeCopilotView = this.app.workspace
        .getLeavesOfType(CHAT_VIEWTYPE)
        .find((leaf) => leaf.view instanceof CopilotView)?.view as CopilotView;
      if (activeCopilotView && (!checkSelectedText || selectedText)) {
        const event = new CustomEvent(eventType, { detail: { selectedText, eventSubtype } });
        activeCopilotView.eventTarget.dispatchEvent(event);
      }
    }, 0);
  }

  processSelection(editor: Editor, eventType: string, eventSubtype?: string) {
    this.processText(editor, eventType, eventSubtype);
  }

  emitChatIsVisible() {
    const activeCopilotView = this.app.workspace
      .getLeavesOfType(CHAT_VIEWTYPE)
      .find((leaf) => leaf.view instanceof CopilotView)?.view as CopilotView;

    if (activeCopilotView) {
      const event = new CustomEvent(EVENT_NAMES.CHAT_IS_VISIBLE);
      activeCopilotView.eventTarget.dispatchEvent(event);
    }
  }

  initActiveLeafChangeHandler() {
    this.registerEvent(
      this.app.workspace.on("active-leaf-change", (leaf) => {
        if (!leaf) {
          return;
        }
        if (leaf.getViewState().type === CHAT_VIEWTYPE) {
          this.emitChatIsVisible();
        }
      })
    );
  }

  private getCurrentEditorOrDummy(): Editor {
    const activeView = this.app.workspace.getActiveViewOfType(MarkdownView);
    return {
      getSelection: () => {
        const selection = activeView?.editor?.getSelection();
        if (selection) return selection;
        // Default to the entire active file if no selection
        const activeFile = this.app.workspace.getActiveFile();
        return activeFile ? this.app.vault.cachedRead(activeFile) : "";
      },
      replaceSelection: activeView?.editor?.replaceSelection.bind(activeView.editor) || (() => {}),
    } as Partial<Editor> as Editor;
  }

  processCustomPrompt(eventType: string, customPrompt: string) {
    const editor = this.getCurrentEditorOrDummy();
    this.processText(editor, eventType, customPrompt, false);
  }

  toggleView() {
    const leaves = this.app.workspace.getLeavesOfType(CHAT_VIEWTYPE);
    if (leaves.length > 0) {
      this.deactivateView();
    } else {
      this.activateView();
    }
  }

  async activateView(): Promise<void> {
    const leaves = this.app.workspace.getLeavesOfType(CHAT_VIEWTYPE);
    if (leaves.length === 0) {
      if (getSettings().defaultOpenArea === DEFAULT_OPEN_AREA.VIEW) {
        await this.app.workspace.getRightLeaf(false).setViewState({
          type: CHAT_VIEWTYPE,
          active: true,
        });
      } else {
        await this.app.workspace.getLeaf(true).setViewState({
          type: CHAT_VIEWTYPE,
          active: true,
        });
      }
    } else {
      this.app.workspace.revealLeaf(leaves[0]);
    }
    this.emitChatIsVisible();
  }

  async deactivateView() {
    this.app.workspace.detachLeavesOfType(CHAT_VIEWTYPE);
  }

  async loadSettings() {
    const savedSettings = await this.loadData();
    const sanitizedSettings = sanitizeSettings(savedSettings);
    setSettings(sanitizedSettings);
  }

  mergeActiveModels(
    existingActiveModels: CustomModel[],
    builtInModels: CustomModel[]
  ): CustomModel[] {
    const modelMap = new Map<string, CustomModel>();

    // Create a unique key for each model, it's model (name + provider)

    // Add or update existing models in the map
    existingActiveModels.forEach((model) => {
      const key = getModelKeyFromModel(model);
      const existingModel = modelMap.get(key);
      if (existingModel) {
        // If it's a built-in model, preserve the built-in status
        modelMap.set(key, {
          ...model,
          isBuiltIn: existingModel.isBuiltIn || model.isBuiltIn,
        });
      } else {
        modelMap.set(key, model);
      }
    });

    return Array.from(modelMap.values());
  }

  async loadCopilotChatHistory() {
    const chatFiles = await this.getChatHistoryFiles();
    if (chatFiles.length === 0) {
      new Notice("No chat history found.");
      return;
    }
    new LoadChatHistoryModal(this.app, chatFiles, this.loadChatHistory.bind(this)).open();
  }

  async getChatHistoryFiles(): Promise<TFile[]> {
    const folder = this.app.vault.getAbstractFileByPath(getSettings().defaultSaveFolder);
    if (!(folder instanceof TFolder)) {
      return [];
    }

    const files = await this.app.vault.getMarkdownFiles();
    const folderFiles = files.filter((file) => file.path.startsWith(folder.path));

    // Get current project ID if in a project
    const currentProject = getCurrentProject();
    const currentProjectId = currentProject?.id;

    if (currentProjectId) {
      // In project mode: return only files with this project's ID prefix
      const projectPrefix = `${currentProjectId}__`;
      return folderFiles.filter((file) => file.basename.startsWith(projectPrefix));
    } else {
      // In non-project mode: return only files without any project ID prefix
      // This assumes project IDs always use the format projectId__ as prefix
      return folderFiles.filter((file) => {
        // Check if the filename has any projectId__ prefix pattern
        return !file.basename.match(/^[a-zA-Z0-9-]+__/);
      });
    }
  }

  async loadChatHistory(file: TFile) {
    // First autosave the current chat if the setting is enabled
    await this.autosaveCurrentChat();

    const content = await this.app.vault.read(file);
    const messages = parseChatContent(content);

    // Check if the Copilot view is already active
    const existingView = this.app.workspace.getLeavesOfType(CHAT_VIEWTYPE)[0];
    if (!existingView) {
      // Only activate the view if it's not already open
      this.activateView();
    }

    // Load messages into ChatUIState (which now handles memory updates)
    await this.chatUIState.loadMessages(messages);

    // Update the view
    const copilotView = (existingView || this.app.workspace.getLeavesOfType(CHAT_VIEWTYPE)[0])
      ?.view as CopilotView;
    if (copilotView) {
      copilotView.updateView();
    }
  }

  async handleNewChat() {
    // First autosave the current chat if the setting is enabled
    await this.autosaveCurrentChat();

    // Abort any ongoing streams before clearing chat
    const existingView = this.app.workspace.getLeavesOfType(CHAT_VIEWTYPE)[0];
    if (existingView) {
      const copilotView = existingView.view as CopilotView;
      // Dispatch abort event to stop any ongoing streams
      const abortEvent = new CustomEvent(EVENT_NAMES.ABORT_STREAM, {
        detail: { reason: ABORT_REASON.NEW_CHAT },
      });
      copilotView.eventTarget.dispatchEvent(abortEvent);
    }

    // Clear messages through ChatUIState (which also clears chain memory)
    this.chatUIState.clearMessages();

    // Update view if it exists
    if (existingView) {
      const copilotView = existingView.view as CopilotView;
      copilotView.updateView();
    } else {
      // If view doesn't exist, open it
      await this.activateView();
    }

    // Note: UI-specific state like includeActiveNote setting is handled in the Chat component
    // This ensures proper separation of concerns between plugin logic and UI state
  }

  async newChat() {
    // Just delegate to the shared method
    await this.handleNewChat();
  }

  async customSearchDB(query: string, salientTerms: string[], textWeight: number): Promise<any[]> {
    const retriever = new TieredLexicalRetriever(app, {
      minSimilarityScore: 0.3,
      maxK: 20,
      salientTerms: salientTerms,
      textWeight: textWeight,
    });

    const results = await retriever.getRelevantDocuments(query);
    return results.map((doc) => ({
      content: doc.pageContent,
      metadata: doc.metadata,
    }));
  }
}