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//go:generate genny -in=pagers_template.go -out=pager_bug.go gen "NodeType=bug.Snapshot EdgeType=BugEdge"
//go:generate genny -in=pagers_template.go -out=pager_operation.go gen "NodeType=bug.Operation EdgeType=OperationEdge"
//go:generate genny -in=pagers_template.go -out=pager_comment.go gen "NodeType=bug.Comment EdgeType=CommentEdge"
package resolvers
import (
"encoding/base64"
"fmt"
"strconv"
"strings"
)
const cursorPrefix = "cursor:"
type Edge interface {
GetCursor() string
}
// Creates the cursor string from an offset
func offsetToCursor(offset int) string {
str := fmt.Sprintf("%v%v", cursorPrefix, offset)
return base64.StdEncoding.EncodeToString([]byte(str))
}
// 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
}
func (e OperationEdge) GetCursor() string {
return e.Cursor
}
func (e BugEdge) GetCursor() string {
return e.Cursor
}
func (e CommentEdge) GetCursor() string {
return e.Cursor
}
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