blob: 0083f8b245f566c0b4bf8bb54b5bc093893f143e (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
//go:generate genny -in=connection_template.go -out=gen_lazy_bug.go gen "Name=LazyBug NodeType=entity.Id EdgeType=LazyBugEdge ConnectionType=models.BugConnection"
//go:generate genny -in=connection_template.go -out=gen_lazy_identity.go gen "Name=LazyIdentity NodeType=entity.Id EdgeType=LazyIdentityEdge ConnectionType=models.IdentityConnection"
//go:generate genny -in=connection_template.go -out=gen_identity.go gen "Name=Identity NodeType=models.IdentityWrapper EdgeType=models.IdentityEdge ConnectionType=models.IdentityConnection"
//go:generate genny -in=connection_template.go -out=gen_operation.go gen "Name=Operation NodeType=bug.Operation EdgeType=models.OperationEdge ConnectionType=models.OperationConnection"
//go:generate genny -in=connection_template.go -out=gen_comment.go gen "Name=Comment NodeType=bug.Comment EdgeType=models.CommentEdge ConnectionType=models.CommentConnection"
//go:generate genny -in=connection_template.go -out=gen_timeline.go gen "Name=TimelineItem NodeType=bug.TimelineItem EdgeType=models.TimelineItemEdge ConnectionType=models.TimelineItemConnection"
//go:generate genny -in=connection_template.go -out=gen_label.go gen "Name=Label NodeType=bug.Label EdgeType=models.LabelEdge ConnectionType=models.LabelConnection"
// Package connections implement a generic GraphQL relay connection
package connections
import (
"encoding/base64"
"fmt"
"strconv"
"strings"
)
const cursorPrefix = "cursor:"
// Edge define the contract for an edge in a relay connection
type Edge interface {
GetCursor() string
}
// OffsetToCursor create the cursor string from an offset
func OffsetToCursor(offset int) string {
str := fmt.Sprintf("%v%v", cursorPrefix, offset)
return base64.StdEncoding.EncodeToString([]byte(str))
}
// CursorToOffset re-derives the offset from the cursor string.
func CursorToOffset(cursor string) (int, error) {
str := ""
b, err := base64.StdEncoding.DecodeString(cursor)
if err == nil {
str = string(b)
}
str = strings.Replace(str, cursorPrefix, "", -1)
offset, err := strconv.Atoi(str)
if err != nil {
return 0, fmt.Errorf("Invalid cursor")
}
return offset, nil
}
|
