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// Copyright 2019-present Facebook Inc. All rights reserved.
// This source code is licensed under the Apache 2.0 license found
// in the LICENSE file in the root directory of this source tree.
package printer
import (
"fmt"
"io"
"reflect"
"strconv"
"strings"
"github.com/facebook/ent/entc/gen"
"github.com/olekukonko/tablewriter"
)
// A Config controls the output of Fprint.
type Config struct {
io.Writer
}
// Print prints a table description of the graph to the given writer.
func (p Config) Print(g *gen.Graph) {
for _, n := range g.Nodes {
p.node(n)
}
}
// Fprint executes "pretty-printer" on the given writer.
func Fprint(w io.Writer, g *gen.Graph) {
Config{Writer: w}.Print(g)
}
// node returns description of a type. The format of the description is:
//
// Type:
// <Fields Table>
//
// <Edges Table>
//
func (p Config) node(t *gen.Type) {
var (
b strings.Builder
table = tablewriter.NewWriter(&b)
header = []string{"Field", "Type", "Unique", "Optional", "Nillable", "Default", "UpdateDefault", "Immutable", "StructTag", "Validators"}
)
b.WriteString(t.Name + ":\n")
table.SetAutoFormatHeaders(false)
table.SetHeader(header)
for _, f := range append([]*gen.Field{t.ID}, t.Fields...) {
v := reflect.ValueOf(*f)
row := make([]string, len(header))
for i := range row {
field := v.FieldByNameFunc(func(name string) bool {
// The first field is mapped from "Name" to "Field".
return name == "Name" && i == 0 || name == header[i]
})
row[i] = fmt.Sprint(field.Interface())
}
table.Append(row)
}
table.Render()
table = tablewriter.NewWriter(&b)
table.SetAutoFormatHeaders(false)
table.SetHeader([]string{"Edge", "Type", "Inverse", "BackRef", "Relation", "Unique", "Optional"})
for _, e := range t.Edges {
table.Append([]string{
e.Name,
e.Type.Name,
strconv.FormatBool(e.IsInverse()),
e.Inverse,
e.Rel.Type.String(),
strconv.FormatBool(e.Unique),
strconv.FormatBool(e.Optional),
})
}
if table.NumLines() > 0 {
table.Render()
}
io.WriteString(p, strings.ReplaceAll(b.String(), "\n", "\n\t")+"\n")
}
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