1 files changed, 146 insertions, 0 deletions
diff --git a/Godeps/_workspace/src/github.com/huandu/facebook/paging_result.go b/Godeps/_workspace/src/github.com/huandu/facebook/paging_result.go
new file mode 100644
index 000000000..f1eb9b7f1
--- /dev/null
+++ b/Godeps/_workspace/src/github.com/huandu/facebook/paging_result.go
@@ -0,0 +1,146 @@
+// A facebook graph api client in go.
+// https://github.com/huandu/facebook/
+//
+// Copyright 2012 - 2015, Huan Du
+// Licensed under the MIT license
+// https://github.com/huandu/facebook/blob/master/LICENSE
+
+package facebook
+
+import (
+	"bytes"
+	"fmt"
+	"net/http"
+)
+
+type pagingData struct {
+	Data   []Result `facebook:",required"`
+	Paging *pagingNavigator
+}
+
+type pagingNavigator struct {
+	Previous string
+	Next     string
+}
+
+func newPagingResult(session *Session, res Result) (*PagingResult, error) {
+	// quick check whether Result is a paging response.
+	if _, ok := res["data"]; !ok {
+		return nil, fmt.Errorf("current Result is not a paging response.")
+	}
+
+	pr := &PagingResult{
+		session: session,
+	}
+	paging := &pr.paging
+	err := res.Decode(paging)
+
+	if err != nil {
+		return nil, err
+	}
+
+	if paging.Paging != nil {
+		pr.previous = paging.Paging.Previous
+		pr.next = paging.Paging.Next
+	}
+
+	return pr, nil
+}
+
+// Get current data.
+func (pr *PagingResult) Data() []Result {
+	return pr.paging.Data
+}
+
+// Decodes the current full result to a struct. See Result#Decode.
+func (pr *PagingResult) Decode(v interface{}) (err error) {
+	res := Result{
+		"data": pr.Data(),
+	}
+	return res.Decode(v)
+}
+
+// Read previous page.
+func (pr *PagingResult) Previous() (noMore bool, err error) {
+	if !pr.HasPrevious() {
+		noMore = true
+		return
+	}
+
+	return pr.navigate(&pr.previous)
+}
+
+// Read next page.
+func (pr *PagingResult) Next() (noMore bool, err error) {
+	if !pr.HasNext() {
+		noMore = true
+		return
+	}
+
+	return pr.navigate(&pr.next)
+}
+
+// Check whether there is previous page.
+func (pr *PagingResult) HasPrevious() bool {
+	return pr.previous != ""
+}
+
+// Check whether there is next page.
+func (pr *PagingResult) HasNext() bool {
+	return pr.next != ""
+}
+
+func (pr *PagingResult) navigate(url *string) (noMore bool, err error) {
+	var pagingUrl string
+
+	// add session information in paging url.
+	params := Params{}
+	pr.session.prepareParams(params)
+
+	if len(params) == 0 {
+		pagingUrl = *url
+	} else {
+		buf := &bytes.Buffer{}
+		buf.WriteString(*url)
+		buf.WriteRune('&')
+		params.Encode(buf)
+
+		pagingUrl = buf.String()
+	}
+
+	var request *http.Request
+	var res Result
+
+	request, err = http.NewRequest("GET", pagingUrl, nil)
+
+	if err != nil {
+		return
+	}
+
+	res, err = pr.session.Request(request)
+
+	if err != nil {
+		return
+	}
+
+	if pr.paging.Paging != nil {
+		pr.paging.Paging.Next = ""
+		pr.paging.Paging.Previous = ""
+	}
+	paging := &pr.paging
+	err = res.Decode(paging)
+
+	if err != nil {
+		return
+	}
+
+	if paging.Paging == nil || len(paging.Data) == 0 {
+		*url = ""
+		noMore = true
+	} else {
+		pr.previous = paging.Paging.Previous
+		pr.next = paging.Paging.Next
+	}
+
+	return
+}