Added support for the 'expand:renderfields' option

A couple of fields can be rendered server side, especially the ones
related to dates (that can become string like "2 hours ago"), and the
comments body that can be expanded from JIRA wiki markup into HTML.
A new type IssueRenderedFields has been introduced with a couple of
fields that can be expanded.

examples/renderedfields/main.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"net/http"
+	"os"
+	"strings"
+	"syscall"
+
+	jira "github.com/andygrunwald/go-jira"
+	"golang.org/x/crypto/ssh/terminal"
+)
+
+func main() {
+	r := bufio.NewReader(os.Stdin)
+
+	fmt.Print("Jira URL: ")
+	jiraURL, _ := r.ReadString('\n')
+
+	fmt.Print("Jira Issue key: ")
+	key, _ := r.ReadString('\n')
+	key = strings.TrimSpace(key)
+
+	fmt.Print("Jira Username: ")
+	username, _ := r.ReadString('\n')
+
+	fmt.Print("Jira Password: ")
+	bytePassword, _ := terminal.ReadPassword(int(syscall.Stdin))
+	password := string(bytePassword)
+
+	var tp *http.Client
+
+	if strings.TrimSpace(username) == "" {
+		tp = nil
+	} else {
+
+		ba := jira.BasicAuthTransport{
+			Username: strings.TrimSpace(username),
+			Password: strings.TrimSpace(password),
+		}
+		tp = ba.Client()
+	}
+
+	client, err := jira.NewClient(tp, strings.TrimSpace(jiraURL))
+	if err != nil {
+		fmt.Printf("\nerror: %v\n", err)
+		return
+	}
+
+	fmt.Printf("Targetting %s for issue %s\n", strings.TrimSpace(jiraURL), key)
+
+	options := &jira.GetQueryOptions{Expand: "renderedFields"}
+	u, _, err := client.Issue.Get(key, options)
+
+	if err != nil {
+		fmt.Printf("\n==> error: %v\n", err)
+		return
+	}
+
+	fmt.Printf("RenderedFields: %+v\n", *u.RenderedFields)
+
+	for _, c := range u.RenderedFields.Comments.Comments {
+		fmt.Printf("  %+v\n", c)
+	}
+}

issue.go

@@ -31,12 +31,13 @@ type IssueService struct {
 
 // Issue represents a JIRA issue.
 type Issue struct {
-	Expand    string       `json:"expand,omitempty" structs:"expand,omitempty"`
-	ID        string       `json:"id,omitempty" structs:"id,omitempty"`
-	Self      string       `json:"self,omitempty" structs:"self,omitempty"`
-	Key       string       `json:"key,omitempty" structs:"key,omitempty"`
-	Fields    *IssueFields `json:"fields,omitempty" structs:"fields,omitempty"`
-	Changelog *Changelog   `json:"changelog,omitempty" structs:"changelog,omitempty"`
+	Expand         string               `json:"expand,omitempty" structs:"expand,omitempty"`
+	ID             string               `json:"id,omitempty" structs:"id,omitempty"`
+	Self           string               `json:"self,omitempty" structs:"self,omitempty"`
+	Key            string               `json:"key,omitempty" structs:"key,omitempty"`
+	Fields         *IssueFields         `json:"fields,omitempty" structs:"fields,omitempty"`
+	RenderedFields *IssueRenderedFields `json:"renderedFields,omitempty" structs:"renderedFields,omitempty"`
+	Changelog      *Changelog           `json:"changelog,omitempty" structs:"changelog,omitempty"`
 }
 
 // ChangelogItems reflects one single changelog item of a history item
@@ -196,6 +197,23 @@ func (i *IssueFields) UnmarshalJSON(data []byte) error {
 
 }
 
+// IssueRenderedFields represents rendered fields of a JIRA issue.
+// Not all IssueFields are rendered.
+type IssueRenderedFields struct {
+	// TODO Missing fields
+	//      * "aggregatetimespent": null,
+	//      * "workratio": -1,
+	//      * "lastViewed": null,
+	//      * "aggregatetimeoriginalestimate": null,
+	//      * "aggregatetimeestimate": null,
+	//      * "environment": null,
+	Resolutiondate string    `json:"resolutiondate,omitempty" structs:"resolutiondate,omitempty"`
+	Created        string    `json:"created,omitempty" structs:"created,omitempty"`
+	Duedate        string    `json:"duedate,omitempty" structs:"duedate,omitempty"`
+	Updated        string    `json:"updated,omitempty" structs:"updated,omitempty"`
+	Comments       *Comments `json:"comment,omitempty" structs:"comment,omitempty"`
+}
+
 // IssueType represents a type of a JIRA issue.
 // Typical types are "Request", "Bug", "Story", ...
 type IssueType struct {