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package svc // import "github.com/getwtxt/getwtxt/svc"
import (
"html/template"
"log"
"os"
"os/signal"
"sync"
"time"
"github.com/getwtxt/registry"
"github.com/spf13/pflag"
)
var (
// Vers contains the version number set at build time
Vers string
flagVersion *bool = pflag.BoolP("version", "v", false, "Display version information, then exit.")
flagHelp *bool = pflag.BoolP("help", "h", false, "Display the quick-help screen.")
flagMan *bool = pflag.BoolP("manual", "m", false, "Display the configuration manual.")
flagConfFile *string = pflag.StringP("config", "c", "", "The name/path of the configuration file you wish to use.")
flagAssets *string = pflag.StringP("assets", "a", "", "The location of the getwtxt assets directory")
flagDBPath *string = pflag.StringP("db", "d", "", "Path to the getwtxt database")
flagDBType *string = pflag.StringP("dbtype", "t", "", "Type of database being used")
)
// Holds the global configuration
var confObj = &Configuration{}
// Signals to close the log file
var closeLog = make(chan bool, 1)
// Used to transmit database pointer, database ticker,
// and cache ticker after initialization
var dbChan = make(chan dbase, 1)
var dbTickC = make(chan *tick, 1)
var cTickC = make(chan *tick, 1)
// Used to manage the landing page template
var tmpls *template.Template
// Holds the registry data in-memory
var twtxtCache = registry.NewIndex()
// List of other registries submitted to this registry
var remoteRegistries = &RemoteRegistries{
Mu: sync.RWMutex{},
List: make([]string, 0),
}
// In-memory cache of static assets, specifically
// the parsed landing page and the stylesheet.
var staticCache = &staticAssets{}
func errFatal(context string, err error) {
if err != nil {
log.Fatalf(context+"%v\n", err.Error())
}
}
func errLog(context string, err error) {
if err != nil {
log.Printf(context+"%v\n", err.Error())
}
}
// I'm not using init() because it runs
// even during testing and was causing
// problems.
func initSvc() {
checkFlags()
titleScreen()
initConfig()
initLogging()
initDatabase()
tmpls = initTemplates()
initPersistence()
pingAssets()
watchForInterrupt()
}
func checkFlags() {
pflag.Parse()
if *flagVersion {
titleScreen()
os.Exit(0)
}
if *flagHelp {
titleScreen()
helpScreen()
os.Exit(0)
}
if *flagMan {
titleScreen()
helpScreen()
manualScreen()
os.Exit(0)
}
}
// Starts the tickers that periodically:
// - pull new user statuses into cache
// - push cached data to disk
func initPersistence() {
confObj.Mu.RLock()
cacheTkr := initTicker(false, confObj.CacheInterval)
dbTkr := initTicker(true, confObj.DBInterval)
confObj.Mu.RUnlock()
go dataTimer(cacheTkr)
go dataTimer(dbTkr)
dbTickC <- dbTkr
cTickC <- cacheTkr
}
// Watch for SIGINT aka ^C
// Close the log file then exit
func watchForInterrupt() {
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
go func() {
for sigint := range c {
log.Printf("Caught %v. Cleaning up ...\n", sigint)
confObj.Mu.RLock()
log.Printf("Closing database connection to %v...\n", confObj.DBPath)
killTickers()
killDB()
if !confObj.StdoutLogging {
closeLog <- true
}
confObj.Mu.RUnlock()
close(dbChan)
close(closeLog)
// Let everything catch up
time.Sleep(100 * time.Millisecond)
os.Exit(0)
}
}()
}
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