Engine: Scripting support (#383)

* WIP

* updated appveyor and increased deadline 5 seconds due to increased linters being added

* revert files to upstream/engine

* WIP

* WIP

* mod file changes

* added script manager

* Added manager/and cli interfaces to scripting

* Added script task handler

* WIP - Added timer/repeat support and fleshed out wrapper further

* autoload support added + WIP

* WIP commit

* added account balance info

* btc markets temp work around

* WIP - merged with upstream for new order package BTC Markets responses broken

* Cancel order wrapper WIP

*  order wrapper update

* Added test coverage for VM

* moved to map for VM List shutdown of all VM now handled added gctcli commands for list and stop of running scripts

* added override to load/execute for path

* fixed incorrect channel shutdown added further test coverage and restructured gctcli commands into sub commands

* increased test coverage for packages

* Added docs cleaned up tests and example scripts

* Test coverage increased for module/gct/exchange package

* windows fixes

* merged upstream/engine

* WIP

* logger fixes - removed pointer to bool check removed duplicate test check for logger

* remove unused mutex

* added inital upload support

* fix linter issues for go-fmt

* added zip support for uploading and added base for fund withdrawing

* changed error return types and also log errors, fix zip path issue

* improved error outputs and code flow

* pairs response fix added protobuf defs for stop all and list all

* added stop all running scripts general clean up and moved across to OrderManager

* linter fixes (gofmt)

* added list all command

* rewrote zip handler to be cleaner also fixed file overwrite on upload

* added query command reworked tests

* added further error checking to compileandrun corrected use of pointers for accountinfo

* bumped tengo version

* Removed named returns reworded log messages removed unused falseptr

* WIP

* Added virutal machine limit improved config options

* added model for script event added upload validation

* script_event table has been completed, tests for wrapper functions implemented

* README updates

* reverted changes opened new PR to move withdraw struct outs

* intial work on adding withdraw support after merger of withdraw package

* started work on examples

* Added crypto withdraw support

* fix switch case assignment and gofmt project

* Reworking Fiat withdraw request pending #402

* removed double pointer call

* added withdraw support for fiat  currencies

* added tests for withdraw methods increased readme

* removed local tengo require and also fix linter issues

* Added default log size const added basic test for invalid script execution

* First pass at moving wrapper to validator package to allow proper validation of uploaded scripts

* Added script details to README added config test added test for no file extension

* moved tests to const and fixed incorrect pathing

* added test coverage to withdraw package

* corrected file close handling

* point to included configtest.json

* extended validator support when a script is uploaded

* Bug fix on bool logic

* Added mutex

* Don't create autit events on test execution

* reverted common to master

* moved file rename to unix timestamp format

* converted logger enabled back to pointer as i need nilness check also moved scriptid to text over blob

* started work on autoload add/remove support

* First round of PR fixes (mostly commented exports)

* Moved GCTScript load to last, removed unneeded error from cleanup()

* Comment clairty for AuitEventID

* added autoload add/remove command to cli

* added tests for autoload

* Test updates for Exchanges

* linter fixes (gofmt)

* Removed double check of engine pointer

* remove possible nil pointer on GetSpecificTicker

* Fixed not closing file handler on write that causes archive removal to fail

* file handler Close clean ups

* corrected spelling on error return and return invalid name n autoload

* moved strings to cosnt moved bool pointer creation to convert package

* new zip extractor added

* Validation has been added to archive uploads

* removed shadow var on err

* added ok check to conversion

* converted condition check

* basic test for zip extract added

* new zip handler

* reverted back to old atomic loading system

* removed shadow err

* lets add a new line

* added space to error return

* command line toggle for script now works properly

* readme updated

* set configLoaded to true

* check for configLoaded condition

* added mutex to allow for multiple access on virtual machine increased test coverage disable script manager if scripting is disabled

* linked up to enable/disablesubsystem commands

* added start/stop example to readme

* reworked logic on test as check should be done on Load()

* updated to tengo v2

* linters

* lower time on ntp client to stop slippage

* remove all fails if any fail validtion from an archive

* remove vm from list if timer is invalid

* removed shadow on err

* remove config creation from NTPCheck test

* WIP testing DB changes

* add unique constraint

* WIP: created has many model

* linters run

* basic sqlite3 support added for new database format

* linters run

* Added test coverage for script repo

* removed unused print

* updated env vars for CI instances

* updated env vars for CI instances

* Updated test packages

* Test updates for postgresql

* removed invalid tests from postgres

* remove duplication of struct and improved code flow

* general cleanup

* wording changes on log output

* use databasemgr logger and add support for autoload without file extension

* corrected test naming

* return correct error

* return correct error again version 82

* store scriptdata on creation

* Hello

* Errorln -> Errorf

* Removed unused vars

* Read me updates

* testing without parallel

* comment on exported type

* added nil check against VM for test

* add debugging information

* gofmt

* remove verbose and data sent to channel

* Added debug information

* linter fixes (gofmt)

* remove unused CompileAndRun() call

* test sleep to see if issue is timing related

* semi-concurrent map fixes

* one day i will run gofmt or setup precommit hooks

* new line :D

* increased test coverage

* added correct sleep time

* Moved over to sync map

* linter fixes (gofmt)

* goimports

* moved VM related methods to vm.go

* new line at end of file

* trying increased timeout on golangci-lint for appveyor

* add debugging information

* removed timeout

* reworked timeout logic

* linter fixes (gofmt)

* increased test coverage

* increased test coverage

* one day i will run gofmt or setup precommit hooks

* removed unused exchange test

* increased golangci-lint timeout

* Added nil check on shutdown and test coverage for it lowered timeout back to 1:30

* reworked ID system

* removed script hash as it was unused

* added comments on exported methods and read me update

* reorder code

* removed to atomic.value for test execution flag

* increased test coverage

* move add further up execution

* point to correct script file

engine/engine.go

@@ -17,6 +17,7 @@ import (
 	"github.com/thrasher-corp/gocryptotrader/dispatch"
 	exchange "github.com/thrasher-corp/gocryptotrader/exchanges"
 	"github.com/thrasher-corp/gocryptotrader/exchanges/request"
+	gctscript "github.com/thrasher-corp/gocryptotrader/gctscript/vm"
 	log "github.com/thrasher-corp/gocryptotrader/logger"
 	"github.com/thrasher-corp/gocryptotrader/portfolio"
 	"github.com/thrasher-corp/gocryptotrader/utils"
@@ -32,6 +33,7 @@ type Engine struct {
 	NTPManager                  ntpManager
 	ConnectionManager           connectionManager
 	DatabaseManager             databaseManager
+	GctScriptManager            gctScriptManager
 	OrderManager                orderManager
 	PortfolioManager            portfolioManager
 	CommsManager                commsManager
@@ -115,6 +117,8 @@ func ValidateSettings(b *Engine, s *Settings) {
 	b.Settings.EnablePortfolioManager = s.EnablePortfolioManager
 	b.Settings.EnableCoinmarketcapAnalysis = s.EnableCoinmarketcapAnalysis
 	b.Settings.EnableDatabaseManager = s.EnableDatabaseManager
+	b.Settings.EnableGCTScriptManager = s.EnableGCTScriptManager
+	b.Settings.MaxVirtualMachines = s.MaxVirtualMachines
 	b.Settings.EnableDispatcher = s.EnableDispatcher
 
 	if flagSet["grpc"] {
@@ -141,6 +145,14 @@ func ValidateSettings(b *Engine, s *Settings) {
 		b.Settings.EnableDeprecatedRPC = b.Config.RemoteControl.DeprecatedRPC.Enabled
 	}
 
+	if flagSet["gctscriptmanager"] {
+		gctscript.GCTScriptConfig.Enabled = s.EnableGCTScriptManager
+	}
+
+	if flagSet["maxvirtualmachines"] {
+		gctscript.GCTScriptConfig.MaxVirtualMachines = uint8(s.MaxVirtualMachines)
+	}
+
 	b.Settings.EnableCommsRelayer = s.EnableCommsRelayer
 	b.Settings.EnableEventManager = s.EnableEventManager
 
@@ -266,10 +278,14 @@ func PrintSettings(s *Settings) {
 	log.Debugf(log.Global, "\t Exchange HTTP timeout: %v", s.ExchangeHTTPTimeout)
 	log.Debugf(log.Global, "\t Exchange HTTP user agent: %v", s.ExchangeHTTPUserAgent)
 	log.Debugf(log.Global, "\t Exchange HTTP proxy: %v\n", s.ExchangeHTTPProxy)
+	log.Debugf(log.Global, "- GCTSCRIPT SETTINGS: ")
+	log.Debugf(log.Global, "\t Enable GCTScript manager: %v", s.EnableGCTScriptManager)
+	log.Debugf(log.Global, "\t GCTScript max virtual machines: %v", s.MaxVirtualMachines)
 	log.Debugf(log.Global, "- COMMON SETTINGS:")
 	log.Debugf(log.Global, "\t Global HTTP timeout: %v", s.GlobalHTTPTimeout)
 	log.Debugf(log.Global, "\t Global HTTP user agent: %v", s.GlobalHTTPUserAgent)
 	log.Debugf(log.Global, "\t Global HTTP proxy: %v", s.ExchangeHTTPProxy)
+
 	log.Debugln(log.Global)
 }
 
@@ -423,6 +439,14 @@ func (e *Engine) Start() error {
 		go WebsocketRoutine()
 	}
 
+	if e.Settings.EnableGCTScriptManager {
+		if e.Config.GCTScript.Enabled {
+			if err := e.GctScriptManager.Start(); err != nil {
+				log.Errorf(log.Global, "GCTScript manager unable to start: %v", err)
+			}
+		}
+	}
+
 	return nil
 }
 
@@ -434,6 +458,11 @@ func (e *Engine) Stop() {
 		e.Config.Portfolio = portfolio.Portfolio
 	}
 
+	if e.GctScriptManager.Started() {
+		if err := e.GctScriptManager.Stop(); err != nil {
+			log.Errorf(log.Global, "GCTScript manager unable to stop. Error: %v", err)
+		}
+	}
 	if e.OrderManager.Started() {
 		if err := e.OrderManager.Stop(); err != nil {
 			log.Errorf(log.Global, "Order manager unable to stop. Error: %v", err)