Support creating an organization contributor

Ref T734

author.go

@@ -0,0 +1,54 @@
+package writeas
+
+import (
+	"fmt"
+	"net/http"
+)
+
+type (
+	// Author represents a Write.as author.
+	Author struct {
+		User *User
+		Name string `json:"name"`
+		Slug string `json:"slug"`
+	}
+
+	// AuthorParams are used to create or update a Write.as author.
+	AuthorParams struct {
+		// Name is the public display name of the Author.
+		Name string `json:"name"`
+
+		// Slug is the optional slug for the Author.
+		Slug string `json:"slug"`
+
+		// OrgAlias is the alias of the organization the Author belongs to.
+		OrgAlias string `json:"-"`
+	}
+)
+
+// CreateContributor creates a new contributor on the given organization.
+func (c *Client) CreateContributor(sp *AuthorParams) (*Author, error) {
+	if sp.OrgAlias == "" {
+		return nil, fmt.Errorf("AuthorParams.OrgAlias is required.")
+	}
+
+	a := &Author{}
+	env, err := c.post("/organizations/"+sp.OrgAlias+"/contributors", sp, a)
+	if err != nil {
+		return nil, err
+	}
+
+	var ok bool
+	if a, ok = env.Data.(*Author); !ok {
+		return nil, fmt.Errorf("Wrong data returned from API.")
+	}
+
+	status := env.Code
+	if status != http.StatusCreated {
+		if status == http.StatusBadRequest {
+			return nil, fmt.Errorf("Bad request: %s", env.ErrorMessage)
+		}
+		return nil, fmt.Errorf("Problem creating author: %d. %s\n", status, env.ErrorMessage)
+	}
+	return a, nil
+}

author_test.go

@@ -0,0 +1,37 @@
+package writeas
+
+import "testing"
+
+func TestClient_CreateContributor(t *testing.T) {
+	c := NewClientWith(Config{URL: "http://localhost:7777/api"})
+	_, err := c.LogIn("test", "test")
+	if err != nil {
+		t.Fatalf("login: %s", err)
+	}
+
+	tests := []struct {
+		name  string
+		AName string
+		ASlug string
+		AOrg  string
+	}{
+		{
+			name:  "good",
+			AName: "Bob Contrib",
+			ASlug: "bob",
+			AOrg:  "write-as",
+		},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			_, err = c.CreateContributor(&AuthorParams{
+				Name:     test.AName,
+				Slug:     test.ASlug,
+				OrgAlias: test.AOrg,
+			})
+			if err != nil {
+				t.Fatalf("create %s: %s", test.name, err)
+			}
+		})
+	}
+}