1 files changed, 79 insertions, 0 deletions
diff --git a/src/ipm/models/requirement.py b/src/ipm/models/requirement.py
new file mode 100644
index 0000000..223ac18
--- /dev/null
+++ b/src/ipm/models/requirement.py
@@ -0,0 +1,79 @@
+from typing import Optional, Union
+from ipm.const import INDEX
+from ipm.exceptions import ProjectError
+from ipm.models.index import Yggdrasil
+from ipm.typing import Dict, List
+
+
+class Requirement:
+    name: str
+    version: str
+    path: Optional[str]
+    yggdrasil: Yggdrasil
+    url: Optional[str]
+    hash: Optional[str]
+
+    def __init__(
+        self,
+        name: str,
+        version: str,
+        url: Optional[str] = None,
+        path: Optional[str] = None,
+        yggdrasil: Optional[Yggdrasil] = None,
+        hash: Optional[str] = None,
+    ) -> None:
+        from ipm.models.lock import PackageLock
+
+        global_lock = PackageLock()
+        yggdrasil = yggdrasil or global_lock.get_yggdrasil_by_index(INDEX)
+        if not yggdrasil:
+            raise ProjectError("未能找到任何世界树地址，请先添加一个世界树地址。")
+        self.name = name
+        self.version = version
+        self.path = path
+        self.url = url or yggdrasil.get_url(name, version)
+        self.yggdrasil = yggdrasil
+        self.hash = hash
+
+    def is_local(self) -> bool:
+        return bool(self.path)
+
+
+class Requirements(List[Requirement]):
+    def __init__(
+        self,
+        requirements: Dict[str, Union[Dict, str]],
+        yggdrasils: Optional[Dict[str, Optional[Yggdrasil]]] = None,
+    ) -> None:
+        from ipm.models.lock import PackageLock
+
+        global_lock = PackageLock()
+        url = path = yggdrasil = version = None
+        for name, requirement in requirements.items():
+            if isinstance(requirement, str):
+                self.append(Requirement(name=name, version=requirement))
+            else:
+                for key, value in requirement.items():
+                    if key == "index":
+                        yggdrasil = global_lock.get_yggdrasil_by_index(value)
+                    elif key == "url":
+                        url = value
+                    elif key == "yggdrasil":
+                        yggdrasil = (yggdrasils or {}).get(value)
+                        if not yggdrasil:
+                            raise ValueError(f"未知的世界树标识符: '{value}'")
+                    elif key == "path":
+                        path = value
+                    elif key == "version":
+                        version = value
+                    else:
+                        raise ValueError(f"未知的依赖项键值: '{key}'")
+                self.append(
+                    Requirement(
+                        name=name,
+                        version=version or "*",
+                        path=path,
+                        url=url,
+                        yggdrasil=yggdrasil,
+                    )
+                )