Grants feature access when a user is either a premium subscriber or on an active trial.
package main
import (
"context"
"encoding/json"
"log"
"os"
"time"
"github.com/akennis/sparsi-go/library"
_ "github.com/akennis/dagor/operator/builtin"
"github.com/panjf2000/ants/v2"
"github.com/akennis/dagor"
"github.com/akennis/dagor/graph"
)
func main() {
isPremium := false
isTrial := true
library.RegisterConst("premium_val", isPremium)
library.RegisterConst("trial_val", isTrial)
g, err := graph.NewBuilder("bool_or_demo").
Vertex("prem_src").Op("premium_val").
Output("Result", "premium_wire").
Vertex("trial_src").Op("trial_val").
Output("Result", "trial_wire").
Vertex("or_gate").Op("BoolOrOp").
Input("A", "premium_wire").
Input("B", "trial_wire").
Output("Result", "has_access").
Build()
if err != nil {
log.Fatalf("build: %v", err)
}
pool, err := ants.NewPool(4)
if err != nil {
log.Fatalf("pool: %v", err)
}
defer pool.Release()
eng, err := dagor.NewEngine(g, pool)
if err != nil {
log.Fatalf("engine: %v", err)
}
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
defer cancel()
if err := eng.Run(ctx); err != nil {
log.Fatalf("run: %v", err)
}
out := map[string]any{
"is_premium": isPremium,
"is_trial": isTrial,
}
if raw, ok := eng.GetOutput("has_access"); ok {
out["has_access"] = *raw.(*bool)
}
enc := json.NewEncoder(os.Stdout)
enc.SetIndent("", " ")
enc.Encode(out)
}