Add PermissionSchemeService

Expand the PermissionScheme struct of ProjectService.

Add new PermissionSchemeService with functions Get and GetList.

Add corresponding mocks and tests.

permissionscheme.go

@@ -0,0 +1,62 @@
+package jira
+
+import "fmt"
+
+// PermissionSchemeService handles permissionschemes for the JIRA instance / API.
+//
+// JIRA API docs: https://docs.atlassian.com/jira/REST/latest/#api/3/permissionscheme
+type PermissionSchemeService struct {
+	client *Client
+}
+type PermissionSchemes struct {
+	PermissionSchemes []PermissionScheme `json:"permissionSchemes" structs:"permissionSchemes"`
+}
+
+type Permission struct {
+	ID     int    `json:"id" structs:"id"`
+	Self   string `json:"expand" structs:"expand"`
+	Holder Holder `json:"holder" structs:"holder"`
+	Name   string `json:"permission" structs:"permission"`
+}
+
+type Holder struct {
+	Type      string `json:"type" structs:"type"`
+	Parameter string `json:"parameter" structs:"parameter"`
+	Expand    string `json:"expand" structs:"expand"`
+}
+
+// GetList returns a list of all permission schemes
+func (s *PermissionSchemeService) GetList() (*PermissionSchemes, *Response, error) {
+	apiEndpoint := "/rest/api/3/permissionscheme"
+	req, err := s.client.NewRequest("GET", apiEndpoint, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	pss := new(PermissionSchemes)
+	resp, err := s.client.Do(req, &pss)
+	if err != nil {
+		jerr := NewJiraError(resp, err)
+		return nil, resp, jerr
+	}
+
+	return pss, resp, nil
+}
+
+// Get returns a full representation of the permission scheme for the schemeID
+func (s *PermissionSchemeService) Get(schemeID int) (*PermissionScheme, *Response, error) {
+	apiEndpoint := fmt.Sprintf("/rest/api/3/permissionscheme/%d", schemeID)
+	req, err := s.client.NewRequest("GET", apiEndpoint, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	ps := new(PermissionScheme)
+	resp, err := s.client.Do(req, ps)
+	if err != nil {
+		jerr := NewJiraError(resp, err)
+		return nil, resp, jerr
+	}
+
+	return ps, resp, nil
+}