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import * as vscode from "vscode";
import * as path from "path";
import { SupabaseClient } from "@supabase/supabase-js";
import { createTwoFilesPatch } from "diff"; // ensure `diff` is installed
import { getCurrentUserId } from "../services/auth-service";
import { getSupabase } from "../auth/supabaseClient";
type FileMap = Record<string, string>;
export class SnapshotManager {
private supabase: SupabaseClient;
private idleTimer: NodeJS.Timeout | null = null;
private IDLE_DELAY = 20_000; // 20s idle window for demo
// Thresholds for creating new snapshots
private LINES_THRESHOLD = 50; // Minimum lines changed
private FILES_THRESHOLD = 5; // Minimum files changed
/** The original/baseline snapshot of the whole workspace (first full capture) */
private baselineSnapshot: FileMap | null = null;
/** Session baseline snapshot for Live Share sessions (host only) */
private sessionBaselineSnapshot: FileMap | null = null;
/** Flag to track if automatic snapshotting is paused (during Live Share) */
private isAutomaticTrackingPaused: boolean = false;
/** Workspace root path for relative path conversion */
private workspaceRoot: string;
/** Broadcast cooldown tracking */
private lastBroadcastTime: number = 0;
private BROADCAST_COOLDOWN = 60_000; // 60 seconds cooldown
/** Track if user has been notified about missing initial snapshot */
private hasShownInitialSnapshotWarning: boolean = false;
/** Track if we're currently taking an initial snapshot */
private isTakingInitialSnapshot: boolean = false;
// ==========================================
// GLOBAL RATE LIMITING (AI API Cost Protection)
// ==========================================
/**
* Global rate limit for ALL snapshot triggers (passive + active)
* Per user: 16 AI snapshots per hour (independent of team)
*/
private readonly MAX_SNAPSHOTS_PER_HOUR = 16;
private readonly RATE_LIMIT_WINDOW_MS = 60 * 60 * 1000; // 1 hour
/**
* Track snapshot timestamps per user
* Key: userId, Value: array of timestamps (sorted, oldest first)
*/
private snapshotHistory: Map<string, number[]> = new Map();
/** Track if user has been shown rate limit warning for current hour */
private hasShownRateLimitWarning: Map<string, boolean> = new Map();
constructor(private context: vscode.ExtensionContext) {
this.supabase = getSupabase();
// Initialize workspace root
const workspaceFolders = vscode.workspace.workspaceFolders;
this.workspaceRoot = workspaceFolders?.[0]?.uri.fsPath || '';
// Load persisted rate limit history from storage
this.loadRateLimitHistory();
vscode.workspace.onDidChangeTextDocument(() => this.onWorkspaceActivity());
vscode.workspace.onDidCreateFiles(() => this.onWorkspaceActivity());
vscode.workspace.onDidDeleteFiles(() => this.onWorkspaceActivity());
vscode.workspace.onDidRenameFiles(() => this.onWorkspaceActivity());
// Monitor when files are opened to check for initial snapshot
vscode.workspace.onDidOpenTextDocument((document) => this.checkInitialSnapshotOnFileOpen(document));
// Check if there are already open documents when extension activates
// Use a small delay to ensure extension context is fully initialized
setTimeout(() => {
this.checkAlreadyOpenDocuments();
}, 1000);
}
// ==========================================
// GLOBAL RATE LIMITING METHODS
// ==========================================
/**
* Checks if the user has exceeded the hourly snapshot limit.
* Returns an object with:
* - allowed: boolean - whether snapshot is allowed
* - remaining: number - snapshots remaining in current window
* - resetTime: Date - when the quota resets
* - message: string - user-friendly message
*/
private checkRateLimit(userId: string): {
allowed: boolean;
remaining: number;
resetTime: Date | null;
message: string;
} {
const now = Date.now();
// Get or initialize snapshot history for this user
let history = this.snapshotHistory.get(userId) || [];
// Remove snapshots older than 1 hour (sliding window)
history = history.filter(timestamp => now - timestamp < this.RATE_LIMIT_WINDOW_MS);
// Update the history
this.snapshotHistory.set(userId, history);
const snapshotsInWindow = history.length;
const remaining = this.MAX_SNAPSHOTS_PER_HOUR - snapshotsInWindow;
if (snapshotsInWindow >= this.MAX_SNAPSHOTS_PER_HOUR) {
// Find the oldest snapshot to calculate reset time
const oldestSnapshot = history[0];
const resetTime = new Date(oldestSnapshot + this.RATE_LIMIT_WINDOW_MS);
const minutesUntilReset = Math.ceil((resetTime.getTime() - now) / 60000);
return {
allowed: false,
remaining: 0,
resetTime: resetTime,
message: `⏱️ AI snapshot limit reached (${this.MAX_SNAPSHOTS_PER_HOUR}/hour). Quota resets in ${minutesUntilReset} minute(s). This helps manage API costs.`
};
}
return {
allowed: true,
remaining: remaining,
resetTime: history.length > 0 ? new Date(history[0] + this.RATE_LIMIT_WINDOW_MS) : null,
message: `${remaining} AI snapshot(s) remaining this hour`
};
}
/**
* Records a snapshot in the rate limit history.
* Call this AFTER successfully creating a snapshot.
*/
private recordSnapshot(userId: string): void {
const now = Date.now();
const history = this.snapshotHistory.get(userId) || [];
history.push(now);
this.snapshotHistory.set(userId, history);
// Reset the warning flag so user can be warned again next hour
this.hasShownRateLimitWarning.delete(userId);
// Persist to storage to prevent restart bypass
this.saveRateLimitHistory();
}
/**
* Shows a one-time warning per hour when user is getting close to limit.
* Call this when user has 2 or fewer snapshots remaining.
*/
private showRateLimitWarningIfNeeded(userId: string, remaining: number): void {
// Only show warning once per hour, and only when 2 or fewer remain
if (remaining <= 2 && !this.hasShownRateLimitWarning.get(userId)) {
vscode.window.showWarningMessage(
`⚠️ AI Snapshot Budget: Only ${remaining} snapshot(s) remaining this hour. Please use wisely to manage API costs.`
);
this.hasShownRateLimitWarning.set(userId, true);
}
}
/**
* Loads rate limit history from persistent storage (globalState).
* Called on extension startup to prevent rate limit bypass via restart.
*/
private loadRateLimitHistory(): void {
try {
const stored = this.context.globalState.get<Record<string, number[]>>('snapshotRateLimitHistory');
if (stored) {
const now = Date.now();
// Convert stored object to Map and filter out expired snapshots
for (const [userId, timestamps] of Object.entries(stored)) {
const validTimestamps = timestamps.filter(ts => now - ts < this.RATE_LIMIT_WINDOW_MS);
if (validTimestamps.length > 0) {
this.snapshotHistory.set(userId, validTimestamps);
}
}
console.log('[SnapshotManager] Rate limit history loaded from storage');
}
} catch (error) {
console.error('[SnapshotManager] Failed to load rate limit history:', error);
}
}
/**
* Saves rate limit history to persistent storage (globalState).
* Called after each snapshot to prevent rate limit bypass via restart.
*/
private saveRateLimitHistory(): void {
try {
// Convert Map to plain object for storage
const toStore: Record<string, number[]> = {};
for (const [userId, timestamps] of this.snapshotHistory.entries()) {
if (timestamps.length > 0) {
toStore[userId] = timestamps;
}
}
this.context.globalState.update('snapshotRateLimitHistory', toStore);
} catch (error) {
console.error('[SnapshotManager] Failed to save rate limit history:', error);
}
}
/**
* Checks already-open documents when extension activates
* This handles the case where user has files open before initial snapshot is taken
*/
private async checkAlreadyOpenDocuments() {
// Check if we have any text documents already open
const openDocuments = vscode.workspace.textDocuments;
if (openDocuments.length > 0) {
// Check the active (visible) document first if it exists
const activeDocument = vscode.window.activeTextEditor?.document;
if (activeDocument) {
await this.checkInitialSnapshotOnFileOpen(activeDocument);
} else if (openDocuments.length > 0) {
// If no active document, check the first open document
await this.checkInitialSnapshotOnFileOpen(openDocuments[0]);
}
}
}
// ——————————————————————
// Public APIs you already call
// ——————————————————————
/** Check if baseline snapshot exists */
public hasBaselineSnapshot(): boolean {
return this.baselineSnapshot !== null;
}
/** Initial full snapshot (called when team is selected) */
public async takeSnapshot(userId: string, projectName: string, teamId?: string) {
// Require teamId for snapshot
if (!teamId) {
console.warn('[SnapshotManager] No team selected - skipping snapshot');
vscode.window.showWarningMessage('Please select a team before taking snapshots');
return;
}
// Mark that we're taking initial snapshot
this.isTakingInitialSnapshot = true;
vscode.window.showInformationMessage('📸 Taking initial workspace snapshot...');
const snapshot = await this.captureWholeWorkspace();
// Save baseline in memory
this.baselineSnapshot = snapshot;
// Reset warning flag since initial snapshot is now taken
this.hasShownInitialSnapshotWarning = false;
// Write to DB: snapshot (all files), clear changes
await this.insertNewSnapshot(userId, projectName, teamId, snapshot, {});
const fileCount = Object.keys(snapshot).length;
vscode.window.showInformationMessage(`✅ Initial snapshot complete: ${fileCount} files captured`);
console.log("Full workspace snapshot saved.");
// Mark that we're done taking initial snapshot
this.isTakingInitialSnapshot = false;
}
/** Idle-based incremental snapshot: recompute ALL changes vs baseline and check thresholds */
public async takeIncrementalSnapshot(userId: string, teamId?: string) {
// Require teamId for snapshot
if (!teamId) {
console.log('[SnapshotManager] No team selected - skipping incremental snapshot');
return;
}
// Initial snapshots should ONLY be created when the user clicks "Switch Team".
if (!this.baselineSnapshot) {
console.log('[SnapshotManager] No baseline snapshot exists - automatic snapshots will not run until user selects a team via Switch Team');
return;
}
// ====== GLOBAL RATE LIMIT CHECK (per-user) ======
const rateLimit = this.checkRateLimit(userId);
if (!rateLimit.allowed) {
console.log(`[SnapshotManager] Rate limit exceeded: ${rateLimit.message}`);
vscode.window.showWarningMessage(rateLimit.message);
return;
}
// Show warning if getting close to limit
this.showRateLimitWarningIfNeeded(userId, rateLimit.remaining);
// =================================================
const projectName = this.getProjectName();
const current = await this.captureWholeWorkspace();
// Build merged diffs vs the ORIGINAL baseline, per file
const mergedChanges = this.computeUnifiedDiffs(this.baselineSnapshot, current);
// Check if changes meet threshold
const filesChanged = Object.keys(mergedChanges).length;
const linesChanged = this.countTotalLines(mergedChanges);
console.log(`[SnapshotManager] Changes detected: ${filesChanged} files, ${linesChanged} lines`);
// Only create snapshot if threshold is met
if (linesChanged >= this.LINES_THRESHOLD || filesChanged >= this.FILES_THRESHOLD) {
vscode.window.showInformationMessage(
`📸 Capturing snapshot: ${filesChanged} files, ${linesChanged} lines changed (${rateLimit.remaining - 1} AI snapshots left this hour)`
);
// Create NEW row with ONLY changes (not full workspace)
// Pass empty object {} for snapshot to save space
await this.insertNewSnapshot(userId, projectName, teamId, {}, mergedChanges);
// Record snapshot in rate limit history (per-user)
this.recordSnapshot(userId);
vscode.window.showInformationMessage(
`✅ Snapshot sent to AI for analysis`
);
// Update baseline to current state
this.baselineSnapshot = current;
console.log("Incremental snapshot saved and sent to AI.");
} else {
console.log(`[SnapshotManager] Threshold not met (need ${this.LINES_THRESHOLD} lines or ${this.FILES_THRESHOLD} files). Skipping snapshot.`);
}
}
// Initial snapshot notification
/**
* Checks if initial snapshot exists when user opens a file.
* Shows a one-time notification if no baseline snapshot exists.
*/
private async checkInitialSnapshotOnFileOpen(document: vscode.TextDocument) {
// Only check for workspace files (not settings, output panels, etc.)
if (document.uri.scheme !== 'file') {
return;
}
// Skip if already shown warning
if (this.hasShownInitialSnapshotWarning) {
return;
}
// Skip if we're currently taking an initial snapshot
if (this.isTakingInitialSnapshot) {
return;
}
// Skip if baseline snapshot exists
if (this.baselineSnapshot) {
return;
}
// Skip if no workspace is open
if (!vscode.workspace.workspaceFolders?.length) {
return;
}
// Check if file is within the workspace
const workspaceFolder = vscode.workspace.getWorkspaceFolder(document.uri);
if (!workspaceFolder) {
return;
}
// Check if user is signed in
const userId = await getCurrentUserId();
if (!userId) {
// User not signed in yet, don't show notification
return;
}
// Mark as shown to prevent repeated notifications
this.hasShownInitialSnapshotWarning = true;
// Show notification with action button
vscode.window.showInformationMessage(
'No initial snapshot detected. Please select a team in the Team panel to track your changes and share updates with your team.',
'Open Team Panel'
).then(selection => {
if (selection === 'Open Team Panel') {
// Open the Team Activity panel
vscode.commands.executeCommand('workbench.view.extension.collabAgent');
}
});
}
// ——————————————————————
// Idle handling
// ——————————————————————
private onWorkspaceActivity() {
// Don't start idle timer if automatic tracking is paused
if (this.isAutomaticTrackingPaused) {
console.log('[SnapshotManager] Automatic tracking paused - ignoring workspace activity');
return;
}
if (this.idleTimer) clearTimeout(this.idleTimer);
this.idleTimer = setTimeout(async () => {
const userId = await this.requireUser();
// Use the same key as AgentPanel (collabAgent.currentTeam)
const teamId = this.context.globalState.get<string>('collabAgent.currentTeam');
console.log('[SnapshotManager] Idle timer fired - teamId:', teamId);
if (userId) await this.takeIncrementalSnapshot(userId, teamId);
}, this.IDLE_DELAY);
}
// ——————————————————————
// Core helpers
// ——————————————————————
/** Capture ALL text files in the workspace (not just open editors). */
private async captureWholeWorkspace(): Promise<FileMap> {
const files: FileMap = {};
if (!vscode.workspace.workspaceFolders?.length) return files;
// Skip common noise
const exclude =
"{**/.git/**,**/node_modules/**,**/.vscode/**,**/dist/**,**/out/**," +
"**/*.png,**/*.jpg,**/*.jpeg,**/*.gif,**/*.svg,**/*.pdf,**/*.ico," +
"**/*.zip,**/*.gz,**/*.tar,**/*.lock,**/*.min.js}";
// Capture up to ~10k files—adjust if you need more/less
const uris = await vscode.workspace.findFiles("**/*", exclude, 10000);
// Read each as text; errors are ignored (binarys etc)
for (const uri of uris) {
try {
const doc = await vscode.workspace.openTextDocument(uri);
// Use RELATIVE paths for portability across machines
const relativePath = this.workspaceRoot
? path.relative(this.workspaceRoot, uri.fsPath)
: uri.fsPath;
files[relativePath] = doc.getText();
} catch {
// Ignore unreadable files
}
}
return files;
}
/** Compute a map: filePath -> unified diff string, comparing current against baseline. */
private computeUnifiedDiffs(baseline: FileMap, current: FileMap): Record<string, string> {
const changed: Record<string, string> = {};
const seen = new Set<string>([...Object.keys(baseline), ...Object.keys(current)]);
for (const file of seen) {
const oldText = baseline[file] ?? "";
const newText = current[file] ?? "";
if (oldText === newText) continue;
// Unified diff (shows + and - clearly, and handles add/delete/edit)
const patch = createTwoFilesPatch(file, file, oldText, newText, "baseline", "current");
changed[file] = patch;
}
return changed;
}
/**
* Insert a NEW snapshot row (not upsert) so edge function triggers on each insert
* This allows AI to summarize each work session separately
*/
private async insertNewSnapshot(
userId: string,
projectName: string,
teamId: string,
snapshot: FileMap,
changes: Record<string, string>
) {
const payload = {
user_id: userId,
team_id: teamId, // Fixed: using team_id instead of project_name
project_name: projectName,
snapshot: snapshot,
changes: changes,
updated_at: new Date().toISOString(),
};
console.log("[DB INSERT] Creating new snapshot row...");
const { data, error } = await this.supabase
.from("file_snapshots")
.insert(payload)
.select();
if (error) {
console.error("Failed to insert snapshot:", error);
vscode.window.showErrorMessage(`Failed to save snapshot: ${error.message}`);
} else {
console.log(`✅ Snapshot successfully inserted for project: ${projectName}`);
if (data && data.length > 0) {
console.log(` Snapshot ID: ${data[0].id}`);
}
}
}
/**
* Count total lines changed across all diffs
* Counts lines starting with + or - (but not +++ or ---)
*/
private countTotalLines(diffs: Record<string, string>): number {
let total = 0;
for (const diff of Object.values(diffs)) {
// Count lines starting with + or - (actual changes)
// Exclude lines starting with +++ or --- (file headers)
const lines = diff.split('\n');
for (const line of lines) {
if (line.startsWith('+') && !line.startsWith('+++')) {
total++;
} else if (line.startsWith('-') && !line.startsWith('---')) {
total++;
}
}
}
return total;
}
private getProjectName(): string {
const w = vscode.workspace.workspaceFolders?.[0];
return w?.name ?? "untitled-workspace";
}
/**
* Publishes a timeline snapshot:
* Creates a new snapshot marking a milestone/publish event
*/
public async publishSnapshot(userId: string, projectName: string, teamId?: string) {
// Require teamId for snapshot
if (!teamId) {
console.warn('[SnapshotManager] No team selected - skipping publish');
vscode.window.showWarningMessage('Please select a team before publishing snapshots');
return;
}
vscode.window.showInformationMessage('📤 Publishing snapshot to timeline...');
const newSnapshot = await this.captureWholeWorkspace();
const diff = this.computeUnifiedDiffs(this.baselineSnapshot || {}, newSnapshot);
// Create a new snapshot row with ONLY changes (not full workspace)
await this.insertNewSnapshot(userId, projectName, teamId, {}, diff);
vscode.window.showInformationMessage('✅ Snapshot published successfully');
// Update baseline to current state
this.baselineSnapshot = newSnapshot;
}
/**
* Manual user-triggered snapshot
* Creates a new snapshot immediately regardless of thresholds
*/
public async userTriggeredSnapshot(userId: string, projectName: string, teamId?: string) {
// Require teamId for snapshot
if (!teamId) {
console.warn('[SnapshotManager] No team selected - skipping manual snapshot');
vscode.window.showWarningMessage('Please select a team before taking snapshots');
return;
}
vscode.window.showInformationMessage('📸 Capturing manual snapshot...');
const newSnapshot = await this.captureWholeWorkspace();
const diff = this.computeUnifiedDiffs(this.baselineSnapshot || {}, newSnapshot);
const filesChanged = Object.keys(diff).length;
const linesChanged = this.countTotalLines(diff);
// Create new snapshot row with ONLY changes (not full workspace)
await this.insertNewSnapshot(userId, projectName, teamId, {}, diff);
vscode.window.showInformationMessage(
`✅ Manual snapshot complete: ${filesChanged} files, ${linesChanged} lines`
);
// Update baseline to current state
this.baselineSnapshot = newSnapshot;
}
/**
* Broadcast snapshot - Manual override that bypasses automatic snapshot constraints
* Checks:
* 1. Initial snapshot exists
* 2. At least 2 lines changed
* 3. 60-second cooldown occured
* 4. Global rate limit not exceeded (10/hour across all triggers)
* Returns success/error object
*/
public async broadcastSnapshot(userId: string, projectName: string, teamId?: string): Promise<{success: boolean, message: string}> {
// Require teamId for snapshot
if (!teamId) {
console.warn('[SnapshotManager] No team selected - skipping broadcast');
return {
success: false,
message: 'Please select a team before broadcasting snapshots'
};
}
// Check 1: Initial snapshot must exist
if (!this.baselineSnapshot) {
console.log('[SnapshotManager] No baseline snapshot exists - cannot broadcast');
return {
success: false,
message: 'Please trigger initial snapshot first by switching to a team'
};
}
// Check 2: Global rate limit (per-user, applies to both passive AND active triggers)
const rateLimit = this.checkRateLimit(userId);
if (!rateLimit.allowed) {
console.log(`[SnapshotManager] Rate limit exceeded for broadcast: ${rateLimit.message}`);
return {
success: false,
message: rateLimit.message
};
}
// Show warning if getting close to limit
this.showRateLimitWarningIfNeeded(userId, rateLimit.remaining);
// Check 3: Cooldown period (broadcast-specific, prevents spam clicking)
const now = Date.now();
const timeSinceLastBroadcast = now - this.lastBroadcastTime;
if (timeSinceLastBroadcast < this.BROADCAST_COOLDOWN) {
const remainingSeconds = Math.ceil((this.BROADCAST_COOLDOWN - timeSinceLastBroadcast) / 1000);
console.log(`[SnapshotManager] Broadcast cooldown active - ${remainingSeconds}s remaining`);
return {
success: false,
message: `Please wait ${remainingSeconds} seconds before broadcasting again`
};
}
// Capture current state and compute changes
const newSnapshot = await this.captureWholeWorkspace();
const diff = this.computeUnifiedDiffs(this.baselineSnapshot, newSnapshot);
const filesChanged = Object.keys(diff).length;
const linesChanged = this.countTotalLines(diff);
console.log(`[SnapshotManager] Broadcast check: ${filesChanged} files, ${linesChanged} lines changed`);
// Check 4: At least 2 lines changed
if (linesChanged < 2) {
console.log('[SnapshotManager] Insufficient changes for broadcast (need at least 2 lines)');
return {
success: false,
message: `Only ${linesChanged} line(s) changed. Need at least 2 lines to broadcast`
};
}
// All checks passed - create broadcast snapshot
vscode.window.showInformationMessage(
`📡 Broadcasting snapshot: ${filesChanged} files, ${linesChanged} lines changed (${rateLimit.remaining - 1} AI snapshots left this hour)`
);
// Create new snapshot row with broadcast marker in file_path
const payload = {
user_id: userId,
team_id: teamId,
project_name: projectName,
snapshot: {},
changes: diff,
file_path: '[BROADCAST]', // Special marker for broadcast snapshots
updated_at: new Date().toISOString(),
};
const { data, error } = await this.supabase
.from("file_snapshots")
.insert(payload)
.select();
if (error) {
console.error('[SnapshotManager] Failed to broadcast snapshot:', error);
return {
success: false,
message: `Failed to broadcast: ${error.message}`
};
}
// Update cooldown timer
this.lastBroadcastTime = now;
// Record snapshot in rate limit history (per-user)
this.recordSnapshot(userId);
// Update baseline to current state
this.baselineSnapshot = newSnapshot;
console.log('[SnapshotManager] Broadcast snapshot created successfully');
vscode.window.showInformationMessage(
`✅ Broadcast successful: ${filesChanged} files, ${linesChanged} lines`
);
return {
success: true,
message: `Broadcast successful: ${filesChanged} files, ${linesChanged} lines changed`
};
}
private async requireUser(): Promise<string> {
const userId = await getCurrentUserId();
if (!userId) {
console.warn("User not signed in — skipping snapshot");
}
return userId ?? "";
}
// ——————————————————————
// Live Share Integration Methods
// ——————————————————————
/**
* Saves any pending local changes and pauses automatic snapshot tracking.
* Called when user joins or starts a Live Share session.
* CRITICAL: This ALWAYS saves pending changes, regardless of thresholds,
* to prevent data loss when starting a Live Share session.
*
* IMPORTANT: This should be called AFTER createSessionBaseline() for hosts,
* so the session baseline includes the pending changes.
*/
public async pauseAutomaticTracking(userId: string, teamId?: string) {
console.log('[SnapshotManager] Pausing automatic tracking for Live Share session');
if (!teamId) {
console.warn('[SnapshotManager] No team selected - skipping final snapshot');
} else {
// IMPORTANT: Force save ANY pending changes, even if below thresholds
// This prevents data loss when starting a Live Share session
await this.forceSavePendingChanges(userId, teamId);
}
// Pause automatic tracking
this.isAutomaticTrackingPaused = true;
// Clear any pending idle timer
if (this.idleTimer) {
clearTimeout(this.idleTimer);
this.idleTimer = null;
}
console.log('[SnapshotManager] Automatic tracking paused');
}
/**
* Forces a snapshot of ANY pending changes, regardless of thresholds.
* Used when starting a Live Share session to prevent data loss.
* This ensures even small uncommitted changes are preserved.
*/
private async forceSavePendingChanges(userId: string, teamId: string) {
console.log('[SnapshotManager] Force-saving pending changes (ignoring thresholds)');
// Initial snapshots should ONLY be created when the user clicks "Switch Team".
if (!this.baselineSnapshot) {
console.log('[SnapshotManager] No baseline snapshot exists - cannot save pending changes. User must select team via Switch Team first.');
vscode.window.showWarningMessage('Please select a team via Switch Team before starting a Live Share session');
return;
}
const projectName = this.getProjectName();
const current = await this.captureWholeWorkspace();
// Build diffs vs the baseline
const changes = this.computeUnifiedDiffs(this.baselineSnapshot, current);
const filesChanged = Object.keys(changes).length;
const linesChanged = this.countTotalLines(changes);
console.log(`[SnapshotManager] Pending changes: ${filesChanged} files, ${linesChanged} lines`);
// Save changes REGARDLESS of threshold (this is the key fix for Bug 2)
if (filesChanged > 0 || linesChanged > 0) {
vscode.window.showInformationMessage(
`📸 Saving pending work before session: ${filesChanged} files, ${linesChanged} lines`
);
// Create NEW row with ONLY changes (not full workspace)
await this.insertNewSnapshot(userId, projectName, teamId, {}, changes);
// Update baseline to current state
this.baselineSnapshot = current;
console.log('[SnapshotManager] Pending changes saved successfully');
} else {
console.log('[SnapshotManager] No pending changes to save');
}
}
/**
* Creates a session baseline snapshot for the host.
* This snapshot will be used to calculate the diff when the session ends.
* Called only when user is the host (starts a session).
* Returns the snapshot ID for linking to the session event.
*
* CRITICAL: This captures the CURRENT workspace state, including any uncommitted changes.
* This must be called BEFORE pauseAutomaticTracking() so it includes pending work.
*/
public async createSessionBaseline(userId: string, teamId: string, sessionId: string): Promise<string | null> {
console.log('[SnapshotManager] Creating session baseline snapshot (including pending changes)');
// Capture current workspace state as session baseline (includes ALL uncommitted work)
this.sessionBaselineSnapshot = await this.captureWholeWorkspace();
const fileCount = Object.keys(this.sessionBaselineSnapshot).length;
console.log(`[SnapshotManager] Session baseline created: ${fileCount} files`);
// Save the session baseline to database so "View Initial Snapshot" button works
// Use a special file_path format to identify this as a session baseline
const projectName = this.getProjectName();
const baselinePayload = {
user_id: userId,
team_id: teamId,
project_name: projectName,
snapshot: this.sessionBaselineSnapshot, // Full snapshot INCLUDING pending changes
changes: {}, // No changes - this is the baseline
file_path: `Live Share Session ${sessionId} (baseline)`,
updated_at: new Date().toISOString(),
};
console.log('[SnapshotManager] Saving session baseline to database...');
const { data, error } = await this.supabase
.from("file_snapshots")
.insert(baselinePayload)
.select();
if (error) {
console.error('[SnapshotManager] Failed to save session baseline:', error);
return null;
}
const snapshotId = data && data.length > 0 ? data[0].id : null;
console.log(`[SnapshotManager] Session baseline saved with ID: ${snapshotId}`);
return snapshotId;
}
/**
* Resumes automatic snapshot tracking after a Live Share session ends.
* Takes a new initial snapshot to set a fresh baseline for local changes.
* Called when session ends (both host and guest).
*/
public async resumeAutomaticTracking(userId: string, projectName: string, teamId?: string) {
console.log('[SnapshotManager] Resuming automatic tracking after Live Share session');
if (!teamId) {
console.warn('[SnapshotManager] No team selected - skipping snapshot');
} else {
// Take a new initial snapshot to set a fresh baseline for local changes
vscode.window.showInformationMessage('📸 Taking snapshot after session...');
await this.takeSnapshot(userId, projectName, teamId);
// Note: takeSnapshot already resets hasShownInitialSnapshotWarning
}
// Resume automatic tracking
this.isAutomaticTrackingPaused = false;
console.log('[SnapshotManager] Automatic tracking resumed');
}
/**
* Calculates and saves the session diff (host only).
* Compares current state against the session baseline created at session start.
* Returns the changes as a unified diff string.
* Called only when the host ends the session.
*/
public async captureSessionChanges(userId: string, teamId: string): Promise<string> {
console.log('[SnapshotManager] Capturing session changes');
if (!this.sessionBaselineSnapshot) {
console.warn('[SnapshotManager] No session baseline found - cannot calculate session changes');
return '';
}
// Capture current workspace state
const currentSnapshot = await this.captureWholeWorkspace();
// Calculate diff against session baseline
const sessionDiff = this.computeUnifiedDiffs(this.sessionBaselineSnapshot, currentSnapshot);
// Convert diff map to a single string
let diffString = '';
for (const [filePath, diff] of Object.entries(sessionDiff)) {
diffString += `\n=== ${filePath} ===\n${diff}\n`;
}
const filesChanged = Object.keys(sessionDiff).length;
const linesChanged = this.countTotalLines(sessionDiff);
console.log(`[SnapshotManager] Session changes: ${filesChanged} files, ${linesChanged} lines`);
// Clear the session baseline
this.sessionBaselineSnapshot = null;
return diffString;
}
} |