v0.1.0-alpha

Changes:
- Implement bootstrapping library for managing several concurrent internal services
- Refactor concurrency model for connections/logical clients and their associated I/O
- Refactor server context singleton
- Refactor error handling
    - Most errors are now gracefully sent to the FSD client directly encoded as an $ER packet,
      enhancing visibility and debugging
    - Most errors are now rightfully treated as non-fatal
- Refactor package/dependency graph
- Refactor calling conventions/interfaces for many packages
- Refactor database package
- Refactor post office

Features:
- Add VATSIM-esque HTTP/JSON "data feed"
- Add ephemeral in-memory database option
- Add user management REST API
- Add improved web interface
- Add MySQL support (drop SQLite support)

client/util.go

@@ -0,0 +1,47 @@
+package client
+
+import (
+	"github.com/renorris/openfsd/postoffice"
+	"github.com/renorris/openfsd/protocol"
+	"github.com/renorris/openfsd/servercontext"
+	"strings"
+)
+
+func (c *FSDClient) sendMOTD() error {
+	lines := strings.Split(servercontext.Config().MOTD, "\n")
+	for _, line := range lines {
+		pdu := protocol.TextMessagePDU{
+			From:    protocol.ServerCallsign,
+			To:      c.callsign,
+			Message: line,
+		}
+		if err := c.connection.WritePacket(pdu.Serialize()); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (c *FSDClient) broadcastAddPilot() {
+	p := protocol.AddPilotPDU{
+		From:             c.callsign,
+		To:               protocol.ServerCallsign,
+		CID:              c.cid,
+		NetworkRating:    c.networkRating,
+		ProtocolRevision: protocol.ProtoRevisionVatsim2022,
+		SimulatorType:    c.simulatorType,
+		RealName:         c.realName,
+	}
+	mail := postoffice.NewMail(c, postoffice.MailTypeBroadcast, "", p.Serialize())
+	servercontext.PostOffice().SendMail(&mail)
+}
+
+func (c *FSDClient) broadcastDeletePilot() {
+	deletePilotPDU := protocol.DeletePilotPDU{
+		From: c.callsign,
+		CID:  c.cid,
+	}
+	mail := postoffice.NewMail(c, postoffice.MailTypeBroadcast, "", deletePilotPDU.Serialize())
+	servercontext.PostOffice().SendMail(&mail)
+}