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fbiville/main.go

Created May 17, 2022 15:32
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  1. fbiville created this gist May 17, 2022.
    54 changes: 54 additions & 0 deletions main.go
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,54 @@
    package main

    import (
    "fmt"
    "github.com/neo4j/neo4j-go-driver/v4/neo4j"
    "io"
    "os"
    "strings"
    )

    func main() {
    driver, err := neo4j.NewDriver(os.Args[1], neo4j.BasicAuth(os.Args[2], os.Args[3], ""))
    if err != nil {
    panic(err)
    }
    defer handleClose(driver)
    session := driver.NewSession(neo4j.SessionConfig{})
    defer handleClose(session)
    result, err := session.ReadTransaction(sayHello)
    if err != nil {
    panic(err)
    }
    fmt.Printf("Program says: %q", result)
    }

    func sayHello(tx neo4j.Transaction) (any, error) {
    result, err := tx.Run(
    `RETURN reduce(acc = "", letter IN $letters | acc + letter) AS hello`,
    map[string]interface{}{
    "letters": strings.Split("Hello, GraphConnect!", ""),
    })
    if err != nil {
    return nil, err
    }
    record, err := result.Single()
    if err != nil {
    return nil, err
    }
    rawHello, found := record.Get("hello")
    if !found {
    return nil, fmt.Errorf("expected 'hello' column in result, none found")
    }
    hello, ok := rawHello.(string)
    if !ok {
    return nil, fmt.Errorf("expected 'hello' column to be a string, but was not")
    }
    return hello, nil
    }

    func handleClose(closer io.Closer) {
    if err := closer.Close(); err != nil {
    panic(err)
    }
    }