feat: Add: 1.Environment trait & config reader; 2.Omiga default const…

…ants.

Signed-off-by: photowey <[email protected]>

crates/core/src/constants.rs

@@ -19,4 +19,17 @@
 // ----------------------------------------------------------------
 
 pub const SIGMA_VERSION: &str = "0.1.0";
-pub const SIGMA_CORE_PROFILE_ACTIVES: &str = "default";
+pub const SIGMA_CORE_PROFILE_ACTIVES_DEFAULT: &str = "default";
+
+// ----------------------------------------------------------------
+
+// omiga.toml | omiga-dev.toml ...
+pub const SIGMA_CORE_CONFIG_FILE_NAME_DEFAULT: &str = "omiga";
+// toml* | yml/yaml | json | properties | ini | ...
+pub const SIGMA_CORE_CONFIG_FILE_SUFFIX_DEFAULT: &str = "toml";
+pub const SIGMA_CORE_CONFIG_FILE_SEARCH_PATHS_DEFAULT: &str = ".,configs,resources";
+
+// ----------------------------------------------------------------
+
+/// 9320: A dream moment for Manchester City's forward `Agüero`.
+pub const SIGMA_WEB_SERVER_PORT_DEFAULT: u32 = 9320;

crates/core/src/error.rs

@@ -0,0 +1,54 @@
+/*
+ * Copyright © 2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// error
+
+// ----------------------------------------------------------------
+
+use std::error::Error;
+use std::fmt;
+
+#[allow(dead_code)] // tmp
+#[derive(Debug, PartialEq)]
+pub enum OmigaError {
+    Runtime(String),
+    IO(String),
+    Database(String),
+    Business(String),
+    Unknown(String),
+}
+
+impl fmt::Display for OmigaError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            OmigaError::Runtime(message) => {
+                write!(f, "Omiga: runtime error, message:[{}]", message)
+            }
+            OmigaError::IO(message) => write!(f, "Omiga: I/O error, message:[{}]", message),
+            OmigaError::Database(message) => {
+                write!(f, "Omiga: database error, message:[{}]", message)
+            }
+            OmigaError::Business(message) => {
+                write!(f, "Omiga: business error, message:[{}]", message)
+            }
+            OmigaError::Unknown(message) => {
+                write!(f, "Omiga: unknown error, message:[{}]", message)
+            }
+        }
+    }
+}
+
+impl Error for OmigaError {}

crates/core/src/lib.rs

@@ -19,3 +19,4 @@
 // ----------------------------------------------------------------
 
 pub mod constants;
+mod error;

crates/env/Cargo.toml

@@ -4,3 +4,4 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+chrono = "0.4"

crates/env/README.md

@@ -1 +1,6 @@
-# `env`
+# `env`
+
+The core functionality is inspired by [configer](https://github.com/photowey/configer), and is mainly a migration to
+adapt to the `omiga` project.
+
+> 

crates/env/src/core.rs

@@ -0,0 +1,22 @@
+/*
+ * Copyright © 2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// core
+
+// ------------------------------------------------------------
+
+pub mod domain;
+pub mod error;