api: Add go files

I know this is a huge commit, but I can't be bothered to check
this in part by part.

api/domain_new.go

@@ -0,0 +1,59 @@
+package main
+
+import (
+	"net/http"
+	"time"
+)
+
+func domainNew(ownerHex string, name string, domain string) error {
+	if ownerHex == "" || name == "" || domain == "" {
+		return errorMissingField
+	}
+
+	statement := `
+		INSERT INTO
+		domains (ownerHex, name, domain, creationDate)
+		VALUES  ($1,       $2,   $3,     $4          );
+	`
+	_, err := db.Exec(statement, ownerHex, name, domain, time.Now().UTC())
+	if err != nil {
+		// TODO: Make sure this is really the error.
+		return errorDomainAlreadyExists
+	}
+
+	return nil
+}
+
+func domainNewHandler(w http.ResponseWriter, r *http.Request) {
+	type request struct {
+		Session *string `json:"session"`
+		Name    *string `json:"name"`
+		Domain  *string `json:"domain"`
+	}
+
+	var x request
+	if err := unmarshalBody(r, &x); err != nil {
+		writeBody(w, response{"success": false, "message": err.Error()})
+		return
+	}
+
+	o, err := ownerGetBySession(*x.Session)
+	if err != nil {
+		writeBody(w, response{"success": false, "message": err.Error()})
+		return
+	}
+
+	domain := stripDomain(*x.Domain)
+
+	if err = domainNew(o.Email, *x.Name, domain); err != nil {
+		writeBody(w, response{"success": false, "message": err.Error()})
+		return
+	}
+
+	if err = domainModeratorNew(*x.Domain, o.Email); err != nil {
+		writeBody(w, response{"success": false, "message": err.Error()})
+		return
+	}
+
+	writeBody(w, response{"success": true, "domain": domain})
+}