1 files changed, 70 insertions, 0 deletions
diff --git a/crates/shirabe/src/dependency_resolver/operation/update_operation.rs b/crates/shirabe/src/dependency_resolver/operation/update_operation.rs
index 6bef3b7..eb6e9d6 100644
--- a/crates/shirabe/src/dependency_resolver/operation/update_operation.rs
+++ b/crates/shirabe/src/dependency_resolver/operation/update_operation.rs
@@ -1 +1,71 @@
 //! ref: composer/src/Composer/DependencyResolver/Operation/UpdateOperation.php
+
+use crate::dependency_resolver::operation::operation_interface::OperationInterface;
+use crate::dependency_resolver::operation::solver_operation::SolverOperation;
+use crate::package::package_interface::PackageInterface;
+use crate::package::version::version_parser::VersionParser;
+
+#[derive(Debug)]
+pub struct UpdateOperation {
+    pub(crate) initial_package: Box<dyn PackageInterface>,
+    pub(crate) target_package: Box<dyn PackageInterface>,
+}
+
+impl UpdateOperation {
+    pub fn new(initial: Box<dyn PackageInterface>, target: Box<dyn PackageInterface>) -> Self {
+        Self { initial_package: initial, target_package: target }
+    }
+
+    pub fn get_initial_package(&self) -> &dyn PackageInterface {
+        self.initial_package.as_ref()
+    }
+
+    pub fn get_target_package(&self) -> &dyn PackageInterface {
+        self.target_package.as_ref()
+    }
+
+    pub fn format(initial_package: &dyn PackageInterface, target_package: &dyn PackageInterface, lock: bool) -> String {
+        let mut from_version = initial_package.get_full_pretty_version(false, PackageInterface::DISPLAY_SOURCE_REF);
+        let mut to_version = target_package.get_full_pretty_version(false, PackageInterface::DISPLAY_SOURCE_REF);
+
+        if from_version == to_version && initial_package.get_source_reference() != target_package.get_source_reference() {
+            from_version = initial_package.get_full_pretty_version(true, PackageInterface::DISPLAY_SOURCE_REF);
+            to_version = target_package.get_full_pretty_version(true, PackageInterface::DISPLAY_SOURCE_REF);
+        } else if from_version == to_version && initial_package.get_dist_reference() != target_package.get_dist_reference() {
+            from_version = initial_package.get_full_pretty_version(true, PackageInterface::DISPLAY_DIST_REF);
+            to_version = target_package.get_full_pretty_version(true, PackageInterface::DISPLAY_DIST_REF);
+        }
+
+        let action_name = if VersionParser::is_upgrade(&initial_package.get_version(), &target_package.get_version()) {
+            "Upgrading"
+        } else {
+            "Downgrading"
+        };
+
+        format!(
+            "{} <info>{}</info> (<comment>{}</comment> => <comment>{}</comment>)",
+            action_name,
+            initial_package.get_pretty_name(),
+            from_version,
+            to_version,
+        )
+    }
+}
+
+impl SolverOperation for UpdateOperation {
+    const TYPE: &'static str = "update";
+}
+
+impl OperationInterface for UpdateOperation {
+    fn get_operation_type(&self) -> String {
+        Self::TYPE.to_string()
+    }
+
+    fn show(&self, lock: bool) -> String {
+        Self::format(self.initial_package.as_ref(), self.target_package.as_ref(), lock)
+    }
+
+    fn to_string(&self) -> String {
+        self.show(true)
+    }
+}