git-bug/api/graphql/connections/connections.go
Michael Muré 2ab6381a94
Reorganize the webUI and API code
Included in the changes:
- create a new /api root package to hold all API code, migrate /graphql in there
- git API handlers all use the cache instead of the repo directly
- git API handlers are now tested
- git API handlers now require a "repo" mux parameter
- lots of untangling of API/handlers/middleware
- less code in commands/webui.go
2020-06-27 23:03:05 +02:00

46 lines
2.1 KiB
Go

//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
}