Create app.py

app.py

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+import streamlit as st
+import json
+
+# Simulate some mock existing resources (you can customize this)
+existing_resources = {
+    "storageAccount1": {
+        "type": "Microsoft.Storage/storageAccounts",
+        "location": "East US",
+        "status": "existing"
+    }
+}
+
+# Function to simulate ARM template deployment evaluation
+def simulate_deployment(arm_template):
+    try:
+        # Load ARM template from pasted JSON
+        template = json.loads(arm_template)
+        
+        # Initialize lists for tracking resources to be created, updated, or deleted
+        resources_to_create = []
+        resources_to_update = []
+        resources_to_delete = []
+
+        # Check the resources in the template
+        for resource in template.get('resources', []):
+            resource_name = resource.get('name')
+            resource_type = resource.get('type')
+            location = resource.get('location')
+
+            # Simulate creation or update
+            if resource_name in existing_resources:
+                if (existing_resources[resource_name]['type'] == resource_type 
+                    and existing_resources[resource_name]['location'] == location):
+                    resources_to_update.append(resource_name)
+                else:
+                    resources_to_create.append(resource_name)  # Re-create if major properties change
+            else:
+                resources_to_create.append(resource_name)
+
+        # Simulate deletion (if something in the template isn't in the mock cloud)
+        for resource_name in existing_resources:
+            if resource_name not in [r.get('name') for r in template.get('resources', [])]:
+                resources_to_delete.append(resource_name)
+
+        # Return results
+        return resources_to_create, resources_to_update, resources_to_delete
+
+    except json.JSONDecodeError:
+        st.error("Invalid JSON format. Please check your ARM template.")
+        return [], [], []
+
+# Streamlit UI
+st.title("ARM Template Simulator")
+st.subheader("Paste your ARM template below to simulate its deployment.")
+
+# Input box for ARM template
+template_input = st.text_area("Paste ARM Template JSON here:", height=300)
+
+# Button to simulate the evaluation
+if st.button("Simulate Template"):
+    if template_input:
+        resources_to_create, resources_to_update, resources_to_delete = simulate_deployment(template_input)
+
+        # Display results
+        st.subheader("Simulation Results:")
+        
+        st.write("### Resources to be Created:")
+        if resources_to_create:
+            st.write(resources_to_create)
+        else:
+            st.write("No new resources will be created.")
+
+        st.write("### Resources to be Updated:")
+        if resources_to_update:
+            st.write(resources_to_update)
+        else:
+            st.write("No resources will be updated.")
+
+        st.write("### Resources to be Deleted:")
+        if resources_to_delete:
+            st.write(resources_to_delete)
+        else:
+            st.write("No resources will be deleted.")
+    else:
+        st.error("Please paste an ARM template to simulate.")