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-rw-r--r--src/papo.go454
1 files changed, 443 insertions, 11 deletions
diff --git a/src/papo.go b/src/papo.go
index aa55df3..413b902 100644
--- a/src/papo.go
+++ b/src/papo.go
@@ -1,28 +1,460 @@
package papo
import (
+ // "bufio"
+ "crypto/rand"
"database/sql"
+ "encoding/hex"
+ "errors"
+ "flag"
"fmt"
- "log"
+ "io"
+ // "log"
+ "log/slog"
+ "math/big"
+ "net"
"os"
+ "runtime/debug"
+ "sync"
+ "syscall"
+ "time"
_ "github.com/mattn/go-sqlite3"
)
-func Hello(name string) string {
- message := fmt.Sprintf("Hi, %v. Welcome!", name)
- return message
+
+/* Global variables */
+var (
+ Hostname string
+ Version string
+ Colour string
+)
+
+
+// FIXME: finish rewriting
+//
+// lastV7time is the last time we returned stored as:
+//
+// 52 bits of time in milliseconds since epoch
+// 12 bits of (fractional nanoseconds) >> 8
+var lastV7Time int64
+var timeMu sync.Mutex
+// getV7Time returns the time in milliseconds and nanoseconds / 256.
+// The returned (milli << (12 + seq)) is guaranteed to be greater than
+// (milli << (12 + seq)) returned by any previous call to getV7Time.
+// `seq` Sequence number is between 0 and 3906 (nanoPerMilli >> 8)
+func getV7Time(nano int64) (int64, int64) {
+ const nanoPerMilli = 1000000
+
+ milli := nano / nanoPerMilli
+ seq := (nano - (milli * nanoPerMilli)) >> 8
+ now := milli << (12 + seq)
+
+ timeMu.Lock()
+ defer timeMu.Unlock()
+ if now <= lastV7Time {
+ now = lastV7Time + 1
+ milli = now >> 12
+ seq = now & 0xfff
+ }
+ lastV7Time = now
+ return milli, seq
}
-func Main() {
- fmt.Println(Hello("papo"))
+const lengthUUID = 16
+
+type UUID struct {
+ bytes [lengthUUID]byte
+}
+
+func NewUUID() UUID {
+ var buf [lengthUUID]byte
+ _, err := io.ReadFull(rand.Reader, buf[7:])
+ FatalIf(err)
+
+ buf[6] = (buf[6] & 0x0f) | 0x40 // Version 4
+ buf[8] = (buf[8] & 0x3f) | 0x80 // Variant is 10
+
+ t, s := getV7Time(time.Now().UnixNano())
+
+ buf[0] = byte(t >> 40)
+ buf[1] = byte(t >> 32)
+ buf[2] = byte(t >> 24)
+ buf[3] = byte(t >> 16)
+ buf[4] = byte(t >> 8)
+ buf[5] = byte(t >> 0)
+
+ buf[6] = 0x70 | (0x0f & byte(s >> 8))
+ buf[7] = byte(s)
+ return UUID { bytes: buf }
+}
+
+func UUIDToString(uuid UUID) string {
+ const dashCount = 4
+ const encodedLength = (lengthUUID * 2) + dashCount
+ dst := [encodedLength]byte {
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ '-',
+ 0, 0, 0, 0,
+ '-',
+ 0, 0, 0, 0,
+ '-',
+ 0, 0, 0, 0,
+ '-',
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0,
+ }
+
+ hex.Encode(dst[ 0:8], uuid.bytes[0:4])
+ hex.Encode(dst[ 9:13], uuid.bytes[4:6])
+ hex.Encode(dst[14:18], uuid.bytes[6:8])
+ hex.Encode(dst[19:23], uuid.bytes[8:10])
+ hex.Encode(dst[24:36], uuid.bytes[10:])
+
+ return string(dst[:])
+}
+
+
+func Debug(message string, type_ string, args ...any) {
+ slog.Debug(
+ message,
+ append(
+ []any {
+ "id", UUIDToString(NewUUID()),
+ "kind", "log",
+ "type", type_,
+ },
+ args...,
+ )...,
+ )
+}
+
+func Info(message string, type_ string, args ...any) {
+ slog.Info(
+ message,
+ append(
+ []any {
+ "id", UUIDToString(NewUUID()),
+ "kind", "log",
+ "type", type_,
+ },
+ args...,
+ )...,
+ )
+}
+
+func Warning(message string, type_ string, args ...any) {
+ slog.Warn(
+ message,
+ append(
+ []any {
+ "id", UUIDToString(NewUUID()),
+ "kind", "log",
+ "type", type_,
+ },
+ args...,
+ )...,
+ )
+}
+
+func Error(message string, type_ string, args ...any) {
+ slog.Error(
+ message,
+ append(
+ []any {
+ "id", UUIDToString(NewUUID()),
+ "kind", "log",
+ "type", type_,
+ },
+ args...,
+ )...,
+ )
+}
+
+func Metric(type_ string, label string, args ...any) {
+ slog.Info(
+ "_",
+ append(
+ []any {
+ "id", UUIDToString(NewUUID()),
+ "kind", "metric",
+ "type", type_,
+ "label", label,
+ },
+ args...,
+ )...,
+ )
+}
+
+type Gauge struct {
+ Inc func(...any)
+ Dec func(...any)
+}
+
+var zero = big.NewInt(0)
+var one = big.NewInt(1)
+func MakeGauge(label string, staticArgs ...any) Gauge {
+ count := big.NewInt(0)
+ emitGauge := func(dynamicArgs ...any) {
+ if count.Cmp(zero) == -1 {
+ Error(
+ "Gauge went negative",
+ "process-metric",
+ append(
+ []any { "value", count },
+ append(
+ staticArgs,
+ dynamicArgs...,
+ )...,
+ )...,
+ )
+ return // avoid wrong metrics being emitted
+ }
+ Metric(
+ "gauge", label,
+ // TODO: we'll have slices.Concat on Go 1.22
+ append(
+ []any { "value", count },
+ append(
+ staticArgs,
+ dynamicArgs...,
+ )...,
+ )...,
+ )
+ }
+ return Gauge {
+ Inc: func(dynamicArgs ...any) {
+ count.Add(count, one)
+ emitGauge(dynamicArgs...)
+ },
+ Dec: func(dynamicArgs ...any) {
+ count.Sub(count, one)
+ emitGauge(dynamicArgs...)
+ },
+ }
+}
+
+func MakeCounter(label string) func(...any) {
+ return func(args ...any) {
+ Metric(
+ "counter", label,
+ append([]any { "value", 1 }, args...)...,
+ )
+ }
+}
+
+var EmitActiveConnection = MakeGauge("active-connections")
+var EmitNicksInChannel = MakeGauge("nicks-in-channel")
+var EmitReceivedCommand = MakeCounter("received-command")
+
+const pingFrequency = time.Duration(30) * time.Second
+const pongMaxLatency = time.Duration(5) * time.Second
- path := "./foo.db"
- os.Remove(path)
- db, err := sql.Open("sqlite3", path)
+func Fatal(err error) {
+ slog.Error("fatal-error", "error", err, "stack", string(debug.Stack()))
+ syscall.Kill(os.Getpid(), syscall.SIGABRT)
+ os.Exit(3)
+}
+
+func FatalIf(err error) {
if err != nil {
- log.Fatal(err)
+ Fatal(err)
}
- defer db.Close()
+}
+
+
+type Channel struct {
+}
+
+type Context struct {
+ dbConn *sql.DB
+ tx chan int
+}
+
+type Message struct {
+ Prefix string
+}
+
+func ReadLoop(ctx *Context, conn net.Conn) {
+ fmt.Println("ReadLoop")
+}
+
+func WriteLoop(ctx *Context, conn net.Conn) {
+ fmt.Println("WriteLoop")
+}
+
+func PingLoop(ctx *Context, conn net.Conn) {
+ fmt.Println("PingLoop")
+}
+
+func HandleConnection(ctx *Context, conn net.Conn) {
+ EmitActiveConnection.Inc()
+ // FIXME: WaitGroup here?
+ go ReadLoop(ctx, conn)
+ go WriteLoop(ctx, conn)
+ go PingLoop(ctx, conn)
+}
+
+func IRCdLoop(ctx *Context, publicSocketPath string) {
+ listener, err := net.Listen("unix", publicSocketPath)
+ FatalIf(err)
+ Info("IRCd started", "component-up", "component", "ircd")
+
+ for {
+ conn, err := listener.Accept()
+ if err != nil {
+ slog.Warn(
+ "Error accepting a public IRCd connection",
+ "err", err,
+ )
+ // conn.Close() // FIXME: is conn nil?
+ continue
+ }
+ go HandleConnection(ctx, conn) // FIXME: where does it get closed
+ }
+}
+
+func CommandListenerLoop(ctx *Context, commandSocketPath string) {
+ listener, err := net.Listen("unix", commandSocketPath)
+ FatalIf(err)
+ Info("command listener started", "component-up", "component", "command-listener")
+
+ for {
+ conn, err := listener.Accept()
+ if err != nil {
+ slog.Warn(
+ "Error accepting a command connection",
+ "err", err,
+ )
+ continue
+ }
+ defer conn.Close()
+
+ // TODO: handle commands
+ }
+}
+
+func TransactorLoop(ctx *Context) {
+ Info("transactor started", "component-up", "component", "transactor")
+ EmitActiveConnection.Inc()
+
+ for tx := range ctx.tx {
+ fmt.Println(tx)
+ }
+}
+
+func SetLoggerOutput(w io.Writer) {
+ slog.SetDefault(slog.New(slog.NewJSONHandler(w, &slog.HandlerOptions {
+ AddSource: true,
+ })).With(
+ slog.Group(
+ "info",
+ "pid", os.Getpid(),
+ "ppid", os.Getppid(),
+ "puuid", UUIDToString(NewUUID()),
+ ),
+ ))
+}
+
+func SetTraceback() {
+ if os.Getenv("GOTRACEBACK") == "" {
+ debug.SetTraceback("crash")
+ }
+}
+
+func SetHostname() {
+ var err error
+ Hostname, err = os.Hostname()
+ FatalIf(err)
+}
+
+func SetEnvironmentVariables() {
+ Version = os.Getenv("PAPO_VERSION")
+ if Version == "" {
+ Version = "PAPO-VERSION-UNKNOWN"
+ }
+
+ Colour = os.Getenv("PAPO_COLOUR")
+ if Colour == "" {
+ Colour = "PAPO-COLOUR-UNKNOWN"
+ }
+}
+
+func InitDB(databasePath string) *sql.DB {
+ DB, err := sql.Open("sqlite3", databasePath)
+ FatalIf(err)
+ return DB
+}
+
+func init() {
+ SetLoggerOutput(os.Stdout)
+ SetTraceback()
+ SetHostname()
+ SetEnvironmentVariables()
+}
+
+func Start(ctx *Context, publicSocketPath string, commandSocketPath string) {
+ buildInfo, ok := debug.ReadBuildInfo()
+ if !ok {
+ Fatal(errors.New("error on debug.ReadBuildInfo()"))
+ }
+
+ Info("-", "lifecycle-event",
+ "event", "starting-server",
+ slog.Group(
+ "go",
+ "version", buildInfo.GoVersion,
+ "settings", buildInfo.Settings,
+ "deps", buildInfo.Deps,
+ ),
+ )
+
+ var wg sync.WaitGroup
+ bgRun := func(f func()) {
+ wg.Add(1)
+ go func() {
+ f()
+ wg.Done()
+ }()
+ }
+ bgRun(func() { IRCdLoop(ctx, publicSocketPath) })
+ bgRun(func() { CommandListenerLoop(ctx, commandSocketPath) })
+ bgRun(func() { TransactorLoop(ctx) })
+ wg.Wait()
+}
+
+func BuildContext(databasePath string) *Context {
+ dbConn := InitDB(databasePath)
+ tx := make(chan int, 100)
+ return &Context {
+ dbConn,
+ tx,
+ }
+}
+
+var (
+ databasePath = flag.String(
+ "f",
+ "papo.db",
+ "The path to the database file",
+ )
+ publicSocketPath = flag.String(
+ "s",
+ "papo.public.socket",
+ "The path to the socket that handles the public traffic",
+ )
+ commandSocketPath = flag.String(
+ "S",
+ "papo.command.socket",
+ "The path to the private IPC commands socket",
+ )
+)
+
+func Main() {
+ flag.Parse()
+ ctx := BuildContext(*databasePath)
+ Start(ctx, *publicSocketPath, *commandSocketPath)
}
generated by cgit v1.2.3 (git 2.49.0) at 2025-07-06 10:28:18 +0000