Fix type assertion safety issues to prevent runtime panics

.changes/unreleased/fixed-20250605-135507.yaml

@@ -0,0 +1,5 @@
+kind: fixed
+body: Fixed type assertion safety issues in multiple services to prevent potential runtime panics when API responses have unexpected structure or types
+time: 2025-06-05T13:55:07.511122417Z
+custom:
+    Issue: "839"

internal/services/connection/api_connection.go

@@ -174,7 +174,11 @@ func (client *client) ShareConnection(ctx context.Context, environmentId, connec
 }
 
 func getPrincipalString(principal map[string]any, key string) (string, error) {
-	value, ok := principal[key].(string)
+	raw, exists := principal[key]
+	if !exists {
+		return "", fmt.Errorf("principal key %s does not exist", key)
+	}
+	value, ok := raw.(string)
 	if !ok {
 		return "", fmt.Errorf("failed to convert principal %s to string", key)
 	}

internal/services/data_record/api_data_record.go

@@ -118,9 +118,11 @@ func (client *client) GetDataRecordsByODataQuery(ctx context.Context, environmen
 	}
 
 	var totalRecords *int64
-	if response["@Microsoft.Dynamics.CRM.totalrecordcount"] != nil {
-		count := int64(response["@Microsoft.Dynamics.CRM.totalrecordcount"].(float64))
-		totalRecords = &count
+	if rawCount, exists := response["@Microsoft.Dynamics.CRM.totalrecordcount"]; exists && rawCount != nil {
+		if count, ok := rawCount.(float64); ok {
+			countInt := int64(count)
+			totalRecords = &countInt
+		}
 	}
 	var totalRecordsCountLimitExceeded *bool
 	if val, ok := response["@Microsoft.Dynamics.CRM.totalrecordcountlimitexceeded"].(bool); ok {
@@ -145,7 +147,20 @@ func (client *client) GetDataRecordsByODataQuery(ctx context.Context, environmen
 		records = append(records, response)
 	}
 
-	pluralName := strings.Split(response["@odata.context"].(string), "#")[1]
+	// Safe extraction of @odata.context
+	odataCtxRaw, exists := response["@odata.context"]
+	if !exists {
+		return nil, errors.New("@odata.context field missing from response")
+	}
+	odataCtx, ok := odataCtxRaw.(string)
+	if !ok {
+		return nil, errors.New("@odata.context field is not a string")
+	}
+	splitParts := strings.Split(odataCtx, "#")
+	if len(splitParts) < 2 {
+		return nil, errors.New("@odata.context string is malformed")
+	}
+	pluralName := splitParts[1]
 	if index := strings.IndexAny(pluralName, "(/"); index != -1 {
 		pluralName = pluralName[:index]
 	}
@@ -154,7 +169,7 @@ func (client *client) GetDataRecordsByODataQuery(ctx context.Context, environmen
 		Records:                  records,
 		TotalRecord:              totalRecords,
 		TotalRecordLimitExceeded: totalRecordsCountLimitExceeded,
-		TableMetadataUrl:         response["@odata.context"].(string),
+		TableMetadataUrl:         odataCtx,
 		// url will be as example: https://org.crm4.dynamics.com/api/data/v9.2/$metadata#tablepluralname/$entity.
 		TablePluralName: pluralName,
 	}, nil
@@ -279,10 +294,16 @@ func (client *client) GetTableSingularNameFromPlural(ctx context.Context, enviro
 	}
 
 	var result string
-	if mapResponse["value"] != nil && len(mapResponse["value"].([]any)) > 0 {
-		if value, ok := mapResponse["value"].([]any)[0].(map[string]any); ok {
-			if logicalName, ok := value["LogicalName"].(string); ok {
-				result = logicalName
+	if rawVal, exists := mapResponse["value"]; exists && rawVal != nil {
+		valueSlice, ok := rawVal.([]any)
+		if !ok {
+			return nil, errors.New("value field is not of type []any")
+		}
+		if len(valueSlice) > 0 {
+			if value, ok := valueSlice[0].(map[string]any); ok {
+				if logicalName, ok := value["LogicalName"].(string); ok {
+					result = logicalName
+				}
 			}
 		}
 	} else if logicalName, ok := mapResponse["LogicalName"].(string); ok {

internal/services/data_record/datasource_data_record.go

@@ -275,27 +275,30 @@
 	attributes := make(map[string]attr.Value)
 
 	for key, value := range columns {
-		switch value.(type) {
+		switch v := value.(type) {
 		case bool:
-			caseBool(columns[key].(bool), attributes, attributeTypes, key)
+			caseBool(v, attributes, attributeTypes, key)
 		case int64:
-			caseInt64(columns[key].(int64), attributes, attributeTypes, key)
+			caseInt64(v, attributes, attributeTypes, key)
 		case float64:
-			caseFloat64(columns[key].(float64), attributes, attributeTypes, key)
+			caseFloat64(v, attributes, attributeTypes, key)
 		case string:
-			caseString(columns[key].(string), attributes, attributeTypes, key)
+			caseString(v, attributes, attributeTypes, key)
 		case map[string]any:
-			typ, val, _ := d.buildObjectValueFromX(columns[key].(map[string]any))
+			typ, val, _ := d.buildObjectValueFromX(v)
 			tupleElementType := types.ObjectType{
 				AttrTypes: typ,
 			}
-			v, _ := types.ObjectValue(typ, val)
-			attributes[key] = v
+			objVal, _ := types.ObjectValue(typ, val)
+			attributes[key] = objVal
 			attributeTypes[key] = tupleElementType
 		case []any:
-			typeObj, valObj := d.buildExpandObject(columns[key].([]any))
+			typeObj, valObj := d.buildExpandObject(v)
 			attributeTypes[key] = typeObj
 			attributes[key] = valObj
+		default:
+			// Handle unexpected types gracefully by skipping them
+			continue
 		}
 	}
 
@@ -309,27 +312,34 @@
 	knownObjectValue := map[string]attr.Value{}
 
 	for key, value := range columns {
-		switch value.(type) {
+		switch v := value.(type) {
 		case bool:
-			caseBool(columns[key].(bool), knownObjectValue, knownObjectType, key)
+			caseBool(v, knownObjectValue, knownObjectType, key)
 		case int64:
-			caseInt64(columns[key].(int64), knownObjectValue, knownObjectType, key)
+			caseInt64(v, knownObjectValue, knownObjectType, key)
 		case float64:
-			caseFloat64(columns[key].(float64), knownObjectValue, knownObjectType, key)
+			caseFloat64(v, knownObjectValue, knownObjectType, key)
 		case string:
-			caseString(columns[key].(string), knownObjectValue, knownObjectType, key)
+			caseString(v, knownObjectValue, knownObjectType, key)
 		case map[string]any:
-			typ, val, _ := d.buildObjectValueFromX(columns[key].(map[string]any))
+			typ, val, _ := d.buildObjectValueFromX(v)
 			tupleElementType := types.ObjectType{
 				AttrTypes: typ,
 			}
-			v, _ := types.ObjectValue(typ, val)
-			knownObjectValue[key] = v
+			objVal, _ := types.ObjectValue(typ, val)
+			knownObjectValue[key] = objVal
 			knownObjectType[key] = tupleElementType
 		case []any:
-			typeObj, valObj := d.buildExpandObject(columns[key].([]any))
+			typeObj, valObj := d.buildExpandObject(v)
 			knownObjectValue[key] = valObj
 			knownObjectType[key] = typeObj
+		default:
+			// Log unexpected types for debugging purposes
+			tflog.Debug(context.Background(), "Skipping unhandled type in buildObjectValueFromX", map[string]interface{}{
+				"key":       key,
+				"valueType": fmt.Sprintf("%T", value),
+			})
+			continue
 		}
 	}
 	return knownObjectType, knownObjectValue, nil

internal/services/solution_checker_rules/datasource_solution_checker_rules.go

@@ -118,7 +118,14 @@
 		)
 		return
 	}
-	d.SolutionCheckerRulesClient = newSolutionCheckerRulesClient(client.Api)
+	// Additional safety check for nil client
+	if client != nil {
+		d.SolutionCheckerRulesClient = newSolutionCheckerRulesClient(client.Api)
+	} else {
+		tflog.Warn(ctx, "Client is nil. Datasource will not be fully configured.", map[string]interface{}{
+			"datasource": d.FullTypeName(),
+		})
+	}
 }
 
 func (d *DataSource) Read(ctx context.Context, req datasource.ReadRequest, resp *datasource.ReadResponse) {

internal/services/tenant_settings/api_tenant_settings.go

@@ -5,6 +5,7 @@ package tenant_settings
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net/http"
 	"net/url"
@@ -82,12 +83,12 @@ func (client *client) UpdateTenantSettings(ctx context.Context, tenantSettings t
 	return &backendSettings, nil
 }
 
-func applyCorrections(ctx context.Context, planned tenantSettingsDto, actual tenantSettingsDto) *tenantSettingsDto {
+func applyCorrections(ctx context.Context, planned tenantSettingsDto, actual tenantSettingsDto) (*tenantSettingsDto, error) {
 	correctedFilter := filterDto(ctx, planned, actual)
 	corrected, ok := correctedFilter.(*tenantSettingsDto)
 	if !ok {
-		tflog.Error(ctx, "Type assertion to failed in applyCorrections")
-		return nil
+		tflog.Error(ctx, "Type assertion failed in applyCorrections")
+		return nil, errors.New("type assertion to *tenantSettingsDto failed in applyCorrections")
 	}
 
 	if planned.PowerPlatform != nil && planned.PowerPlatform.Governance != nil {
@@ -101,7 +102,7 @@ func applyCorrections(ctx context.Context, planned tenantSettingsDto, actual ten
 			corrected.PowerPlatform.Governance.EnvironmentRoutingTargetEnvironmentGroupId = &zu
 		}
 	}
-	return corrected
+	return corrected, nil
 }
 
 // This function is used to filter out the fields that are not opted in to configuration.

internal/services/tenant_settings/resource_tenant_settings.go

@@ -407,7 +407,11 @@ func (r *TenantSettingsResource) Create(ctx context.Context, req resource.Create
 		return
 	}
 
-	stateDto := applyCorrections(ctx, plannedSettingsDto, *tenantSettingsDto)
+	stateDto, err := applyCorrections(ctx, plannedSettingsDto, *tenantSettingsDto)
+	if err != nil {
+		resp.Diagnostics.AddError("Error applying corrections to tenant settings", err.Error())
+		return
+	}
 
 	state, _, err := convertFromTenantSettingsDto[TenantSettingsResourceModel](*stateDto, plan.Timeouts)
 	if err != nil {
@@ -453,7 +457,11 @@ func (r *TenantSettingsResource) Read(ctx context.Context, req resource.ReadRequ
 		resp.Diagnostics.AddError("Error converting to tenant settings DTO", err.Error())
 		return
 	}
-	newStateDto := applyCorrections(ctx, oldStateDto, *tenantSettings)
+	newStateDto, err := applyCorrections(ctx, oldStateDto, *tenantSettings)
+	if err != nil {
+		resp.Diagnostics.AddError("Error applying corrections to tenant settings", err.Error())
+		return
+	}
 	newState, _, err := convertFromTenantSettingsDto[TenantSettingsResourceModel](*newStateDto, state.Timeouts)
 	if err != nil {
 		resp.Diagnostics.AddError("Error converting tenant settings", err.Error())
@@ -522,7 +530,11 @@ func (r *TenantSettingsResource) Update(ctx context.Context, req resource.Update
 	}
 
 	// need to make corrections from what the API returns to match what terraform expects
-	filteredDto := applyCorrections(ctx, plannedDto, *updatedSettingsDto)
+	filteredDto, err := applyCorrections(ctx, plannedDto, *updatedSettingsDto)
+	if err != nil {
+		resp.Diagnostics.AddError("Error applying corrections to tenant settings", err.Error())
+		return
+	}
 
 	newState, _, err := convertFromTenantSettingsDto[TenantSettingsResourceModel](*filteredDto, plan.Timeouts)
 	if err != nil {
@@ -567,10 +579,10 @@ func (r *TenantSettingsResource) Delete(ctx context.Context, req resource.Delete
 		return
 	}
 
-	correctedDto := applyCorrections(ctx, stateDto, originalSettings)
-	if correctedDto == nil {
+	correctedDto, err := applyCorrections(ctx, stateDto, originalSettings)
+	if err != nil {
 		resp.Diagnostics.AddError(
-			"Error applying corrections", "Error applying corrections",
+			"Error applying corrections", fmt.Sprintf("Error applying corrections: %s", err.Error()),
 		)
 		return
 	}