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tags.go
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tags.go
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package mailgun
import (
"context"
"net/url"
"strconv"
"time"
)
type Tag struct {
Value string `json:"tag"`
Description string `json:"description"`
FirstSeen *time.Time `json:"first-seen,omitempty"`
LastSeen *time.Time `json:"last-seen,omitempty"`
}
type tagsResponse struct {
Items []Tag `json:"items"`
Paging Paging `json:"paging"`
}
type ListTagOptions struct {
// Restrict the page size to this limit
Limit int
// Return only the tags starting with the given prefix
Prefix string
}
// DeleteTag removes all counters for a particular tag, including the tag itself.
func (mg *MailgunImpl) DeleteTag(ctx context.Context, tag string) error {
r := newHTTPRequest(generateApiUrl(mg, tagsEndpoint) + "/" + tag)
r.setClient(mg.Client())
r.setBasicAuth(basicAuthUser, mg.APIKey())
_, err := makeDeleteRequest(ctx, r)
return err
}
// GetTag retrieves metadata about the tag from the api
func (mg *MailgunImpl) GetTag(ctx context.Context, tag string) (Tag, error) {
r := newHTTPRequest(generateApiUrl(mg, tagsEndpoint) + "/" + tag)
r.setClient(mg.Client())
r.setBasicAuth(basicAuthUser, mg.APIKey())
var tagItem Tag
return tagItem, getResponseFromJSON(ctx, r, &tagItem)
}
// ListTags returns a cursor used to iterate through a list of tags
// it := mg.ListTags(nil)
// var page []mailgun.Tag
// for it.Next(&page) {
// for _, tag := range(page) {
// // Do stuff with tags
// }
// }
// if it.Err() != nil {
// log.Fatal(it.Err())
// }
func (mg *MailgunImpl) ListTags(opts *ListTagOptions) *TagIterator {
req := newHTTPRequest(generateApiUrl(mg, tagsEndpoint))
if opts != nil {
if opts.Limit != 0 {
req.addParameter("limit", strconv.Itoa(opts.Limit))
}
if opts.Prefix != "" {
req.addParameter("prefix", opts.Prefix)
}
}
url, err := req.generateUrlWithParameters()
return &TagIterator{
tagsResponse: tagsResponse{Paging: Paging{Next: url, First: url}},
err: err,
mg: mg,
}
}
type TagIterator struct {
tagsResponse
mg Mailgun
err error
}
// Next returns the next page in the list of tags
func (ti *TagIterator) Next(ctx context.Context, items *[]Tag) bool {
if ti.err != nil {
return false
}
if !canFetchPage(ti.Paging.Next) {
return false
}
ti.err = ti.fetch(ctx, ti.Paging.Next)
if ti.err != nil {
return false
}
*items = ti.Items
if len(ti.Items) == 0 {
return false
}
return true
}
// Previous returns the previous page in the list of tags
func (ti *TagIterator) Previous(ctx context.Context, items *[]Tag) bool {
if ti.err != nil {
return false
}
if ti.Paging.Previous == "" {
return false
}
if !canFetchPage(ti.Paging.Previous) {
return false
}
ti.err = ti.fetch(ctx, ti.Paging.Previous)
if ti.err != nil {
return false
}
*items = ti.Items
if len(ti.Items) == 0 {
return false
}
return true
}
// First returns the first page in the list of tags
func (ti *TagIterator) First(ctx context.Context, items *[]Tag) bool {
if ti.err != nil {
return false
}
ti.err = ti.fetch(ctx, ti.Paging.First)
if ti.err != nil {
return false
}
*items = ti.Items
return true
}
// Last returns the last page in the list of tags
func (ti *TagIterator) Last(ctx context.Context, items *[]Tag) bool {
if ti.err != nil {
return false
}
ti.err = ti.fetch(ctx, ti.Paging.Last)
if ti.err != nil {
return false
}
*items = ti.Items
return true
}
// Err returns any error if one occurred
func (ti *TagIterator) Err() error {
return ti.err
}
func (ti *TagIterator) fetch(ctx context.Context, url string) error {
ti.Items = nil
req := newHTTPRequest(url)
req.setClient(ti.mg.Client())
req.setBasicAuth(basicAuthUser, ti.mg.APIKey())
return getResponseFromJSON(ctx, req, &ti.tagsResponse)
}
func canFetchPage(slug string) bool {
parts, err := url.Parse(slug)
if err != nil {
return false
}
params, _ := url.ParseQuery(parts.RawQuery)
if err != nil {
return false
}
value, ok := params["tag"]
// If tags doesn't exist, it's our first time fetching pages
if !ok {
return true
}
// If tags has no value, there are no more pages to fetch
return len(value) == 0
}