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31 lines
1.0 KiB
31 lines
1.0 KiB
/* |
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TIN - Time Tracking Application |
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Copyright (C) 2021 Julio Biason |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Affero General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Affero General Public License for more details. |
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You should have received a copy of the GNU Affero General Public License |
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along with this program. If not, see <https://www.gnu.org/licenses/>. |
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*/ |
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/// Trait/tag for DTOs |
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pub trait Dto {} |
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/// Trait that all commands must implement. |
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pub trait Command<T: Dto> { |
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fn execute(self) -> Result<T, CommandError>; |
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} |
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/// Errors produced by invalid commands |
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pub enum CommandError { |
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/// The request identified used in the command is already used. |
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IdentifierAlreadyUsed(String), |
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}
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