Init User Engine – Gamified, Fast, Frontend-First

Init User Engine is a lightweight, no-bloat user system for modern WordPress sites. It』s designed for maximum frontend flexibility and gamified user engagement. All dynamic interfaces are rendered via JavaScript with real-time REST API interaction.

No jQuery. Minimal settings. Smart by default.

What you get:

• Display user avatar and dashboard via shortcode
• Show level, EXP, coin/cash, and full user wallet
• Let users check-in daily and receive timed rewards
• Auto-track referral registrations with reward system
• Allow users to buy VIP status using in-site currency
• Built-in inbox for notifications (uses custom DB table)
• Custom avatar support with upload & preview modal
• Send custom notifications to selected users or all members from wp-admin

This plugin is the core user system behind the Init Plugin Suite – optimized for frontend-first interaction, extensibility, and real-time gamification.

GitHub repository: https://github.com/brokensmile2103/init-user-engine

Features

• Avatar shortcode [init_user_engine] + modal dashboard
• Avatar system with upload, preview, and revert support
• EXP & Level system with hookable progression logic
• Coin & Cash wallet system with transaction logs
• Daily check-in with streak milestones & online bonus timer
• Inbox system with pagination, read/claim/delete
• VIP membership system with coin-based purchase & expiry
• Referral module with cookie-based signup tracking
• REST API for all features (read/write/modify)
• Action/filter hooks for full customization
• Pure Vanilla JS frontend – no jQuery, no server bloat
• Admin notification panel to send messages to selected users or all members

Developer Hooks

Filters

• init_plugin_suite_user_engine_online_minutes – Modify required online minutes after check-in
• init_plugin_suite_user_engine_vip_prices – Modify VIP package prices
• init_plugin_suite_user_engine_referral_rewards – Modify referral rewards
• init_plugin_suite_user_engine_localized_data – Modify frontend JS data
• init_plugin_suite_user_engine_calculated_coin_amount – Modify coin reward before apply
• init_plugin_suite_user_engine_calculated_exp_amount – Modify EXP reward before apply
• init_plugin_suite_user_engine_exp_required – Modify EXP required per level
• init_plugin_suite_user_engine_checkin_milestones – Set milestone streak days
• init_plugin_suite_user_engine_format_inbox – Modify formatted inbox data
• init_plugin_suite_user_engine_render_level_badge – Customize level badge HTML
• init_plugin_suite_user_engine_inbox_insert_data – Modify inbox data before inserting into database
• init_plugin_suite_user_engine_validate_register_fields – Validate or modify registration fields before account creation
• init_plugin_suite_user_engine_after_register – Hook after successful user registration (pass user ID and submitted data)
• init_plugin_suite_user_engine_daily_tasks – Add or modify daily task list and logic
• init_plugin_suite_user_engine_captcha_bank – Extend or modify the internal captcha question bank used for fallback validation
• init_plugin_suite_user_engine_format_log_message – Customize transaction log message display with access to entry data, source, type, and amount

Actions

• init_plugin_suite_user_engine_level_up – When user levels up
• init_plugin_suite_user_engine_exp_added – After EXP is added
• init_plugin_suite_user_engine_transaction_logged – After coin/cash is logged
• init_plugin_suite_user_engine_exp_logged – After EXP log is recorded
• init_plugin_suite_user_engine_inbox_inserted – After new inbox message
• init_plugin_suite_user_engine_referral_completed – When referral is completed
• init_plugin_suite_user_engine_after_checkin – After user check-in
• init_plugin_suite_user_engine_after_claim_reward – After user claims reward
• init_plugin_suite_user_engine_vip_purchased – After VIP is purchased
• init_plugin_suite_user_engine_add_exp – Triggered when adding EXP via hook
• init_plugin_suite_user_engine_add_coin – Triggered when adding coin via hook
• init_plugin_suite_user_engine_coin_changed – After user』s Coin balance is updated
• init_plugin_suite_user_engine_cash_changed – After user』s Cash balance is updated
• init_plugin_suite_user_engine_admin_send_notice – When admin sends notification via wp-admin.

REST API Endpoints

Base: /wp-json/inituser/v1/

• POST /register – Create a new user account
• POST /checkin – Daily check-in
• POST /claim-reward – Claim reward after online duration
• GET /transactions – Get coin/cash transaction log
• GET /exp-log – Get EXP log
• GET /inbox – Get inbox messages
• POST /inbox/mark-read – Mark a message as read
• POST /inbox/mark-all-read – Mark all as read
• POST /inbox/delete – Delete a single message
• POST /inbox/delete-all – Delete all messages
• POST /vip/purchase – Purchase VIP package
• GET /referral-log – Get referral history
• POST /avatar – Upload new avatar
• POST /avatar/remove – Remove custom avatar and revert to default
• GET /profile/me – Get current user profile
• POST /profile/update – Update profile information
• GET /daily-tasks – Get list of completed daily tasks and rewards

License

This plugin is licensed under the GPLv2 or later.
You are free to use, modify, and distribute it under the same license.