add function handling (basic)

api/invoke/worker.go

@@ -0,0 +1,62 @@
+package invoke
+
+import (
+	"io"
+	"log/slog"
+	"net/http"
+	"path/filepath"
+	"time"
+
+	"git.oblat.lv/alex/triggerssmith/internal/config"
+	"git.oblat.lv/alex/triggerssmith/internal/worker"
+	"github.com/go-chi/chi/v5"
+	"gorm.io/gorm"
+)
+
+type Function struct {
+	ID           uint           `gorm:"primaryKey;autoIncrement"`
+	FunctionName string         `gorm:"not null"`
+	Version      string         `gorm:"not null"`
+	Path         string         `gorm:"not null"`
+	CreatedAt    time.Time      `gorm:"autoCreateTime"`
+	DeletedAt    gorm.DeletedAt `gorm:"index"`
+}
+
+func InvokeHandler(cfg *config.Config) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		id := chi.URLParam(r, "function_id")
+		version := chi.URLParam(r, "function_version")
+		slog.Debug("executing a function", slog.String("id", id), slog.String("version", version))
+		root := cfg.Functions.FunctionDir
+		treeCfg, _ := worker.LoadTreeConfig(root)
+		db, err := worker.OpenDB(treeCfg, root)
+		if err != nil {
+			slog.Error("Failed to open db", slog.String("err", err.Error()))
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+		//f, _ := worker.FindFunction(db, "echo", "0.0.1-00130112025")
+		f, err := worker.FindFunction(db, id, version)
+		if err != nil {
+			slog.Error("Failed to find function", slog.String("err", err.Error()))
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+		fc, err := worker.LoadFunctionConfig(root, f.FunctionName, f.Path)
+		if err != nil {
+			slog.Error("Failed to load function config", slog.String("err", err.Error()))
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+
+		input, _ := io.ReadAll(r.Body)
+		output, err := worker.RunFunction(filepath.Join(root, f.FunctionName, f.Path, fc.Entry), fc, input)
+		if err != nil {
+			slog.Error("Failed to run function", slog.String("err", err.Error()))
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+		slog.Debug("executing done", slog.Any("in", input), slog.Any("out", output))
+		w.Write(output)
+	}
+}