add API boilerplate + /accounts/{accountID} and /accounts/@me endpoints

web/api/account.go

@@ -0,0 +1,33 @@
+package api
+
+import (
+	"git.sleepycat.moe/sam/mercury/internal/database"
+	"github.com/oklog/ulid/v2"
+)
+
+// Account is the basic user returned by endpoints, without any private data.
+type Account struct {
+	ID       ulid.ULID `json:"id"`
+	Username string    `json:"username"`
+	Domain   *string   `json:"domain"`
+}
+
+type SelfAccount struct {
+	Account
+	Email string `json:"email"`
+}
+
+func DBAccountToAccount(a database.Account) Account {
+	return Account{
+		ID:       a.ID,
+		Username: a.Username,
+		Domain:   a.Domain,
+	}
+}
+
+func DBAccountToSelfAccount(a database.Account) SelfAccount {
+	return SelfAccount{
+		Account: DBAccountToAccount(a),
+		Email:   *a.Email,
+	}
+}