Feat triggers v0.2.2 (#6)

Co-authored-by: Jeffrey Smith <jasafpro@gmail.com>
Co-committed-by: Jeffrey Smith <jasafpro@gmail.com>

server/triggers/event.go

@@ -0,0 +1,163 @@
+package triggers
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"log"
+	"time"
+
+	"go.starlark.net/starlark"
+
+	"switchboard-core/events"
+	"switchboard-core/models"
+	"switchboard-core/sandbox"
+)
+
+// wireEventTrigger subscribes to the bus pattern for an event trigger.
+func (e *Engine) wireEventTrigger(t *models.Trigger) {
+	if t.EventPattern == "" {
+		return
+	}
+
+	triggerID := t.ID
+	packageID := t.PackageID
+	entryPoint := t.EntryPoint
+	pattern := t.EventPattern
+
+	unsub := e.bus.Subscribe(pattern, func(ev events.Event) {
+		// Fire asynchronously — never block the event bus
+		go e.fireEventTrigger(triggerID, packageID, entryPoint, ev)
+	})
+
+	e.mu.Lock()
+	e.unsubs[triggerID] = unsub
+	e.mu.Unlock()
+}
+
+// fireEventTrigger invokes the Starlark handler for an event trigger.
+func (e *Engine) fireEventTrigger(triggerID, packageID, entryPoint string, ev events.Event) {
+	start := time.Now()
+	ctx := e.ctx
+	if ctx == nil {
+		ctx = context.Background()
+	}
+
+	// Re-check trigger is still enabled
+	trigger, err := e.stores.Triggers.GetByID(ctx, triggerID)
+	if err != nil || trigger == nil || !trigger.Enabled {
+		return
+	}
+
+	// Load package
+	pkg, err := e.stores.Packages.Get(ctx, packageID)
+	if err != nil || pkg == nil || pkg.Status != models.PackageStatusActive {
+		return
+	}
+
+	// Check triggers.register permission
+	if !e.hasPermission(ctx, packageID, models.ExtPermTriggersRegister) {
+		return
+	}
+
+	// Build Starlark context dict
+	ctxDict := starlark.NewDict(6)
+	_ = ctxDict.SetKey(starlark.String("trigger_type"), starlark.String("event"))
+	_ = ctxDict.SetKey(starlark.String("trigger_id"), starlark.String(triggerID))
+	_ = ctxDict.SetKey(starlark.String("event_label"), starlark.String(ev.Label))
+	_ = ctxDict.SetKey(starlark.String("event_ts"), starlark.MakeInt64(ev.Ts))
+	if ev.Room != "" {
+		_ = ctxDict.SetKey(starlark.String("event_room"), starlark.String(ev.Room))
+	}
+	if len(ev.Payload) > 0 {
+		var payloadMap map[string]any
+		if json.Unmarshal(ev.Payload, &payloadMap) == nil {
+			_ = ctxDict.SetKey(starlark.String("event_payload"), mapToStarlark(payloadMap))
+		} else {
+			_ = ctxDict.SetKey(starlark.String("event_payload"), starlark.String(string(ev.Payload)))
+		}
+	}
+
+	// Call entry point with full sandbox context
+	_, output, callErr := e.runner.CallEntryPoint(ctx, pkg, entryPoint,
+		starlark.Tuple{ctxDict}, nil, nil)
+
+	duration := int(time.Since(start).Milliseconds())
+	errStr := ""
+	if callErr != nil {
+		errStr = callErr.Error()
+		log.Printf("  ⚠️  trigger[event] %s/%s error: %v", packageID, entryPoint, callErr)
+	}
+
+	// Update fire state
+	_ = e.stores.Triggers.UpdateFireState(ctx, triggerID, start, errStr)
+
+	// Log execution
+	e.logExecution(triggerID, "", start, duration, callErr == nil, errStr, output)
+	e.publishEvent("trigger.fired", triggerID)
+}
+
+// hasPermission checks if a package has a specific granted permission.
+func (e *Engine) hasPermission(ctx context.Context, packageID, permission string) bool {
+	if e.stores.ExtPermissions == nil {
+		return false
+	}
+	granted, err := e.stores.ExtPermissions.GrantedForPackage(ctx, packageID)
+	if err != nil {
+		return false
+	}
+	for _, p := range granted {
+		if p == permission {
+			return true
+		}
+	}
+	return false
+}
+
+// mapToStarlark converts a map[string]any to a Starlark dict.
+func mapToStarlark(m map[string]any) *starlark.Dict {
+	d := starlark.NewDict(len(m))
+	for k, v := range m {
+		_ = d.SetKey(starlark.String(k), goToStarlark(v))
+	}
+	return d
+}
+
+// goToStarlark converts a Go value to a Starlark value.
+func goToStarlark(v any) starlark.Value {
+	switch val := v.(type) {
+	case nil:
+		return starlark.None
+	case bool:
+		return starlark.Bool(val)
+	case int:
+		return starlark.MakeInt(val)
+	case int64:
+		return starlark.MakeInt64(val)
+	case float64:
+		return starlark.Float(val)
+	case string:
+		return starlark.String(val)
+	case map[string]any:
+		return mapToStarlark(val)
+	case []any:
+		elems := make([]starlark.Value, len(val))
+		for i, e := range val {
+			elems[i] = goToStarlark(e)
+		}
+		return starlark.NewList(elems)
+	default:
+		return starlark.String(fmt.Sprintf("%v", val))
+	}
+}
+
+// RunContext builds a sandbox.RunContext for a trigger invocation.
+func triggerRunContext(userID, teamID string) *sandbox.RunContext {
+	if userID == "" {
+		return nil
+	}
+	return &sandbox.RunContext{
+		UserID: userID,
+		TeamID: teamID,
+	}
+}