Add new application wiring and main protocol

# Created by https://www.gitignore.io/api/go,intellij,windows,linux,osx,eclipse,git

*.pb.go

nakama

# *.pb.go

build/*

!dashboard/build

data/*

*.out

# external packages folder

vendor/

# vendor/

### Intellij ###

# Change Log

All notable changes to this project are documented below.

The format is based on [keep a changelog](http://keepachangelog.com/) and this project uses [semantic versioning](http://semver.org/).

## [Unreleased]

## [1.4.2] - 2018-04-22

### Changed

- Improve handling of transactional retries.

## [1.4.1] - 2018-03-30

### Added

- Allow the server to handle SSL termination of client connections although NOT recommended in production.

- Add code runtime hook for IAP validation messages.

### Changed

- Update social sign-in code for changes to Google's API.

- Migrate code is now cockroach2 compatible.

### Fixed

- Fix bitshift code in rUDP protocol parser.

- Fix incorrect In-app purchase setup availability checks.

- Cast ID in friend add queries which send notifications.

- Expiry field in notifications now stored in database write.

- Return success if user is re-added who is already a friend.

## [1.4.0] - 2017-12-16

### Changed

- Nakama will now log an error and refuse to start if the schema is outdated.

- Drop unused leaderboard 'next' and 'previous' fields.

- A user's 'last online at' field now contains a current UTC milliseconds timestamp if they are currently online.

- Fields that expect JSON content now allow up to 32kb of data.

### Fixed

- Storage remove operations now ignore records that don't exist.

## [1.3.0] - 2017-11-21

### Added

- Improve graceful shutdown behaviour by ensuring the server stops accepting connections before halting other components.

- Add User-Agent to the default list of accepted CORS request headers.

- Improve how the dashboard component is stopped when server shuts down.

- Improve dashboard CORS support by extending the list of allowed request headers.

- Server startup output now contains database version string.

- Migrate command output now contains database version string.

- Doctor command output now contains database version string.

### Changed

- Internal operations exposed to the script runtime through function bindings now silently ignore unknown parameters.

### Fixed

- Blocking users now works correctly when there was no prior friend relationship in place.

- Correctly assign cursor data in paginated leaderboard records list queries.

- Improve performance of user device login operations.

## [1.2.0] - 2017-11-06

### Added

- New experimental rUDP socket protocol option for client connections.

- Accept JSON payloads over WebSocket connections.

### Changed

- Use string identifiers instead of byte arrays for compatibility across Lua, JSON, and client representations.

- Improve runtime hook lookup behaviour.

### [1.1.0] - 2017-10-17

### Added

- Advanced Matchmaking with custom filters and user properties.

### Changed

- Script runtime RPC and HTTP hook errors now return more detail when verbose logging is enabled.

- Script runtime invocations now use separate underlying states to improve concurrency.

### Fixed

- Build system no longer passes flags to Go vet command.

- Haystack leaderboard record listings now return correct results around both sides of the pivot record.

- Haystack leaderboard record listings now return a complete page even when the pivot record is at the end of the leaderboard.

- CRON expression runtime function now correctly uses UTC as the timezone for input timestamps.

- Ensure all runtime 'os' module time functions default to UTC timezone.

## [1.0.2] - 2017-09-29

### Added

- New code runtime function to list leaderboard records for a given set of users.

- New code runtime function to list leaderboard records around a given user.

- New code runtime function to execute raw SQL queries.

- New code runtime function to run CRON expressions.

### Changed

- Handle update now returns a bad input error code if handle is too long.

- Improved handling of accept request headers in HTTP runtime script invocations.

- Improved handling of content type request headers in HTTP runtime script invocations.

- Increase default maximum length of user handle from 20 to 128 characters.

- Increase default maximum length of device and custom IDs from 64 to 128 characters.

- Increase default maximum length of various name, location, timezone, and other free text fields to 255 characters.

- Increase default maximum length of storage bucket, collection, and record from 70 to 128 characters.

- Increase default maximum length of topic room names from 64 to 128 characters.

- Better error responses when runtime function RPC or HTTP hooks fail or return errors.

- Log a more informative error message when social providers are unreachable or return errors.

### Fixed

- Realtime notification routing now correctly resolves connected users.

- The server will now correctly log a reason when clients disconnect unexpectedly.

- Use correct wire format when sending live notifications to clients.

## [1.0.1] - 2017-08-05

### Added

- New code runtime functions to convert UUIDs between byte and string representations.

### Changed

- Improve index selection in storage list operations.

- Payloads in `register_before` hooks now use `PascalCase` field names and expose correctly formatted IDs.

- Metadata regions in users, groups, and leaderboard records are now exposed to the code runtime as Lua tables.

### Fixed

- The code runtime batch user update operations now process correctly.

## [1.0.0] - 2017-08-01

### Added

- New storage partial update feature.

- Log warn messages at startup when using insecure default parameter values.

- Add code runtime function to update groups.

- Add code runtime function to list groups a user is part of.

- Add code runtime function to list users who're members of a group.

- Add code runtime function to submit a score to a leaderboard.

- Send in-app notification on friend request.

- Send in-app notification on friend request accept.

- Send in-app notification when a Facebook friend signs into the game for the first time.

- Send in-app notification to group admins when a user requests to join a private group.

- Send in-app notification to the user when they are added to a group or their request to join a private group is accepted.

- Send in-app notification to the user when someone wants to DM chat.

### Changed

- Use a Lua table with content field when creating new notifications.

- Use a Lua table with metadata field when creating new groups.

- Use a Lua table with metadata field when updating a user.

- Updated configuration variable names. The most important one is `DB` which is now `database.address`.

- Moved all `nakamax` functions into `nakama` runtime module.

- An invalid config file or invalid cmdflag now prevents the server from startup.

- A matchmake token now expires after 30 instead of 15 seconds.

- The code runtime `os.date()` function now returns correct day of year.

- The code runtime context passed to function hooks now use PascalCase case in fields names. For example `context.user_id` is now `context.UserId`.

- Remove `admin` sub-command.

- A group leave operation now returns a specific error code when the last admin attempts to leave.

- A group self list operations now return the user's membership state with each group.

## [1.0.0-rc.1] - 2017-07-18

### Added

- New storage list feature.

- Ban users and create groups from within the code runtime.

- Update users from within the code runtime.

- New In-App Purchase validation feature.

- New In-App Notification feature.

### Changed

- Run Facebook friends import after registration completes.

- Adjust command line flags to be follow pattern in the config file.

- Extend the server protocol to be batch-orientated for more message types.

- Update code runtime modules to use plural function names for batch operations.

- The code runtime JSON encoder/decoder now support root level JSON array literals.

- The code runtime storage functions now expect and return Lua tables for values.

- Login attempts with an ID that does not exist will return a new dedicated error code.

- Register attempts with an ID that already exists will return a new dedicated error code.

### Fixed

- The runtime code for the after hook message was set to "before" incorrectly.

- The user ID was not passed into the function context in "after" authentication messages.

- Authentication messages required hook names which began with "." and "\_".

- A device ID used in a link message which was already in use now returns "link in use" error code.

## [0.13.1] - 2017-06-08

### Added

- Runtime Base64 and Base16 conversion util functions.

### Fixed

- Update storage write permissions validation.

- Runtime module path must derive from `--data-dir` flag value.

- Fix parameter mapping in leaderboard haystack query.

## [0.13.0] - 2017-05-29

### Added

- Lua script runtime for custom code.

- Node status now also reports a startup timestamp.

- New matchmaking feature.

- Optionally send match data to a subset of match participants.

- Fetch users by handle.

- Add friend by handle.

- Filter by IDs in leaderboard list message.

- User storage messages can now set records with public read permission.

### Changed

- The build system now suffixes Windows binaries with `exe` extension.

### Fixed

- Set correct initial group member count when group is created.

- Do not update group count when join requests are rejected.

- Use cast with leaderboard BEST score submissions due to new strictness in database type conversion.

- Storage records can now correctly be marked with no owner (global).

## [0.12.2] - 2017-04-22

### Added

- Add `--logtostdout` flag to redirect log output to console.

- Add build rule to create Docker release images.

### Changed

- Update Zap logging library to latest stable version.

- The `--verbose` flag no longer alters the logging output to print to both terminal and file.

- The log output is now in JSON format.

- Update the healthcheck endpoint to be "/" (root path) of the main server port.

### Fixed

- Fix a race when the heartbeat ticker might not be stopped after a connection is closed.

## [0.12.1] - 2017-03-28

### Added

- Optionally allow JSON encoding in user login/register operations and responses.

### Changed

- Improve user email storage and comparison.

- Allow group batch fetch by both ID and name.

- Increase heartbeat server time precision.

- Rework the embedded dashboard.

- Support 64 characters with `SystemInfo.deviceUniqueIdentifier` on Windows with device ID link messages.

### Fixed

- Fix Facebook unlink operation.

## [0.12.0] - 2017-03-19

### Added

- Dynamic leaderboards feature.

- Presence updates now report the user's handle.

- Add error codes to the server protocol.

### Changed

- The build system now strips up to current dir in recorded source file paths at compile.

- Group names must now be unique.

### Fixed

- Fix regression loading config file.

## [0.11.3] - 2017-02-25

### Added

- Add CORS headers for browser games.

### Changed

- Update response types to realtime match create/join operations.

### Fixed

- Make sure dependent build rules are run with `relupload` rule.

- Fix match presence list generated when joining matches.

## [0.11.2] - 2017-02-17

### Added

- Include Dockerfile and Docker instructions.

- Use a default limit in topic message listings if one is not provided.

- Improve log messages in topic presence diff checks.

- Report self presence in realtime match create and join.

### Changed

- Improve warn message when database is created in migrate subcommand.

- Print database connections to logs on server start.

- Use byte slices with most database operations.

- Standardize match presence field names across chat and realtime protocol.

- Improve concurrency for closed sockets.

### Fixed

- Enforce concurrency control on outgoing socket messages.

- Fix session lookup in realtime message router.

- Fix input validation when chat messages are sent.

- Fix how IDs are handled in various login options.

- Fix presence service shutdown sequence.

- More graceful handling of session operations while connection is closed.

- Fix batch user fetch query construction.

- Fix duplicate leaves reported in topic presence diff messages.

## [0.11.1] - 2017-02-12

### Changed

- Server configuration in dashboard is now displayed as YAML.

- Update server protocol to simplify presence messages across chat and multiplayer.

### Fixed

- Work around a limitation in cockroachdb with type information in group sub-queries.

## [0.11.0] - 2017-02-09

### Added

- Add `--verbose` flag to enable debug logs in server.

- Database name can now be set in migrations and at server startup. i.e. `nakama --db root@127.0.0.1:26257/mydbname`.

- Improve SQL compatibility.

### Changed

- Update db schema to support 64 characters with device IDs. This enables `SystemInfo.deviceUniqueIdentifier` to be used as a source for device IDs on Windows 10.

- Logout messages now close the server-side connection and won't reply.

- Rename logout protocol message type from `TLogout` to `Logout`.

- Update server protocol for friend messages to use IDs as bytes.

### Fixed

- Fix issue where random handle generator wasn't seeded properly.

- Improve various SQL storage, friend, and group queries.

- Send close frame message in the websocket to gracefully close a client connection.

- Build system will now detect modifications to `migrations/...` files and run dependent rules.

## [0.10.0] - 2017-01-14

### Added

- Initial public release.

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