fix(Operator): Added a new method to determine whether or not a given workflow instance is claimable

Signed-off-by: Charles d'Avernas <charles.davernas@neuroglia.io>

Author: cdavernas

src/operator/Synapse.Operator/Services/WorkflowInstanceController.cs

@@ -11,6 +11,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+using Neuroglia.Data.Infrastructure.ResourceOriented;
 using Neuroglia.Data.Infrastructure.Services;
 
 namespace Synapse.Operator.Services;
@@ -93,9 +94,8 @@ protected virtual async Task<WorkflowInstanceHandler> CreateWorkflowInstanceHand
     protected virtual async Task<bool> TryClaimAsync(WorkflowInstance resource, CancellationToken cancellationToken)
     {
         ArgumentNullException.ThrowIfNull(resource);
-        if (resource.Metadata.Labels != null && resource.Metadata.Labels.TryGetValue(SynapseDefaults.Resources.Labels.Operator, out var operatorQualifiedName)) return operatorQualifiedName == this.Operator.Resource.GetQualifiedName();
-        if (this.Workflows.TryGetValue(this.GetResourceCacheKey(resource.Spec.Definition.Name, resource.Spec.Definition.Namespace), out var workflow) && workflow != null 
-            && workflow.Metadata.Labels != null && workflow.Metadata.Labels.TryGetValue(SynapseDefaults.Resources.Labels.Operator, out operatorQualifiedName)) return operatorQualifiedName == this.Operator.Resource.GetQualifiedName();
+        var isClaimable = this.IsWorkflowInstanceClaimable(resource);
+        if (isClaimable.HasValue) return isClaimable.Value;
         try
         {
             var originalResource = resource.Clone();
@@ -120,9 +120,8 @@ protected virtual async Task<bool> TryClaimAsync(WorkflowInstance resource, Canc
     protected virtual async Task<bool> TryReleaseAsync(WorkflowInstance resource, CancellationToken cancellationToken)
     {
         ArgumentNullException.ThrowIfNull(resource);
-        if (resource.Metadata.Labels != null && resource.Metadata.Labels.TryGetValue(SynapseDefaults.Resources.Labels.Operator, out var operatorQualifiedName)) return operatorQualifiedName == this.Operator.Resource.GetQualifiedName();
-        if (this.Workflows.TryGetValue(this.GetResourceCacheKey(resource.Spec.Definition.Name, resource.Spec.Definition.Namespace), out var workflow) && workflow != null
-           && workflow.Metadata.Labels != null && workflow.Metadata.Labels.TryGetValue(SynapseDefaults.Resources.Labels.Operator, out operatorQualifiedName)) return operatorQualifiedName == this.Operator.Resource.GetQualifiedName();
+        var isClaimable = this.IsWorkflowInstanceClaimable(resource);
+        if (isClaimable.HasValue) return isClaimable.Value;
         try
         {
             var originalResource = resource.Clone();
@@ -215,6 +214,20 @@ protected override async Task OnResourceDeletedAsync(WorkflowInstance workflowIn
     /// <returns>A new awaitable <see cref="Task"/></returns>
     protected virtual Task OnResourceSelectorChangedAsync(IDictionary<string, string>? selector) => this.ReconcileAsync(this.CancellationTokenSource.Token);
 
+    /// <summary>
+    /// Determines whether or not the specified <see cref="WorkflowInstance"/> can be claimed by the current <see cref="Resources.Operator"/>
+    /// </summary>
+    /// <param name="workflowInstance">The <see cref="WorkflowInstance"/> to check</param>
+    /// <returns>A boolean indicating whether or not the specified <see cref="WorkflowInstance"/> can be claimed by the current <see cref="Resources.Operator"/></returns>
+    protected virtual bool? IsWorkflowInstanceClaimable(WorkflowInstance workflowInstance)
+    {
+        ArgumentNullException.ThrowIfNull(workflowInstance);
+        if (workflowInstance.Metadata.Labels != null && workflowInstance.Metadata.Labels.TryGetValue(SynapseDefaults.Resources.Labels.Operator, out var operatorQualifiedName)) return operatorQualifiedName == this.Operator.Resource.GetQualifiedName();
+        if (this.Workflows.TryGetValue(this.GetResourceCacheKey(workflowInstance.Spec.Definition.Name, workflowInstance.Spec.Definition.Namespace), out var workflow) && workflow != null
+            && workflow.Metadata.Labels != null && workflow.Metadata.Labels.TryGetValue(SynapseDefaults.Resources.Labels.Operator, out operatorQualifiedName)) return operatorQualifiedName == this.Operator.Resource.GetQualifiedName();
+        return null;
+    }
+
     /// <inheritdoc/>
     protected override async ValueTask DisposeAsync(bool disposing)
     {