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syncer_uri.go
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/
syncer_uri.go
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package types
import (
"fmt"
"net/url"
"strconv"
"strings"
"time"
)
// SyncerURI serves as a default struct for handling url queues
// for fetcher
type (
SyncerURI struct {
Limit int
LastSync *time.Time
Path string
BaseURL string
NextPage string
LastPage string
}
)
// Does the transformation to string, does not
// url encode page cursor, since it needs to be base64
// encoded
func (s *SyncerURI) String() (string, error) {
var query []string
// using query instead of url.Values
// because pageCursor should not be url encoded
query = append(query, fmt.Sprintf("limit=%d", s.Limit))
if s.NextPage != "" {
query = append(query, fmt.Sprintf("pageCursor=%s", s.NextPage))
} else if s.LastPage != "" {
query = append(query, fmt.Sprintf("pageCursor=%s", s.LastPage))
}
if s.LastSync != nil {
query = append(query, fmt.Sprintf("lastSync=%d", s.LastSync.Unix()))
}
return fmt.Sprintf("%s%s?%s", s.BaseURL, s.Path, strings.Join(query[:], "&")), nil
}
// Parse the uri to the struct
func (s *SyncerURI) Parse(uri string) error {
u, err := url.Parse(uri)
if err != nil {
return err
}
var limit int
l := u.Query().Get("limit")
if l != "" {
if limit, err = strconv.Atoi(l); err != nil {
return err
}
}
s.Path = u.Path
s.Limit = limit
if u.Host != "" {
s.BaseURL = fmt.Sprintf("%s://%s", u.Scheme, u.Host)
}
ls := u.Query().Get("lastSync")
if ls != "" {
parsed, err := parseLastSync(ls)
if err != nil {
return err
}
s.LastSync = parsed
}
return nil
}
func parseLastSync(lastSync string) (*time.Time, error) {
if i, err := strconv.ParseInt(lastSync, 10, 64); err == nil {
t := time.Unix(i, 0)
return &t, nil
}
// try different format if above fails
t, err := time.Parse(time.RFC3339, lastSync)
if err != nil {
return nil, err
}
return &t, nil
}