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server.go
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server.go
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package main
import (
"database/sql"
"github.com/carloseduribeiro/working-with-graphql-go/internal/database"
"log"
"net/http"
"os"
"github.com/99designs/gqlgen/graphql/handler"
"github.com/99designs/gqlgen/graphql/playground"
"github.com/carloseduribeiro/working-with-graphql-go/graph"
_ "github.com/mattn/go-sqlite3"
)
const defaultPort = "8080"
func main() {
db, err := sql.Open("sqlite3", "data.db")
if err != nil {
log.Fatalf("failed to open database: %v", err)
}
defer db.Close()
if _, err := db.Exec(`create table if not exists category(id string, name string, description string)`); err != nil {
panic(err)
}
if _, err := db.Exec(`create table if not exists course(id string, name string, description string, category_id string)`); err != nil {
panic(err)
}
port := os.Getenv("PORT")
if port == "" {
port = defaultPort
}
categoryDB := database.NewCategory(db)
courseDB := database.NewCourse(db)
resolver := &graph.Resolver{
CategoryDB: categoryDB,
CourseDB: courseDB,
}
srv := handler.NewDefaultServer(graph.NewExecutableSchema(graph.Config{Resolvers: resolver}))
http.Handle("/", playground.Handler("GraphQL playground", "/query"))
http.Handle("/query", srv)
log.Printf("connect to http://localhost:%s/ for GraphQL playground", port)
log.Fatal(http.ListenAndServe(":"+port, nil))
}