[ENG-2252] Handle node id string representation #124
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🧹 Nitpick comments (2)
opcua_plugin/browse_frontend.go (2)
20-20: Improve error message clarity and actionability.The error message should include next steps and clearer context following our error message guidelines.
- g.Log.Infof("error setting up connection while getting the OPCUA nodes: %v", err) + g.Log.Infof("Failed to establish connection to OPC UA server while browsing nodes: %v. Please verify server availability and connection settings", err)
127-130: Enhance error logging for unexpected node ID parsing failure.Since this is an unexpected error ("should never happen"), we should provide more context for debugging.
- // This should never happen - // All node ids should be valid - logger.Errorf("error parsing node id: %v", err) + // This indicates an unexpected state as all node IDs should be valid at this point + logger.Errorf("Unexpected error parsing node ID '%s' while constructing node hierarchy: %v. This may indicate a bug in node ID normalization", normalizedParentID, err)
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opcua_plugin/browse_frontend.go (2)
Pattern **/*: When reviewing an error message, ensure it meets these guidelines. If a message is lacking (e.g., missing clear next steps or context), provide an example of the correct format to help improve clarity and usability.
Quick Guidelines for Writing Effective Error Messages
1. Structure Your Message with Three Key Parts
• Context:
Explain what the system was doing.
Example: “Couldn’t parse config file: /etc/sample-config.properties.”
• Error Description:
Clearly state what failed without generic wording.
Example: “Invalid snapshot mode ‘nevr’ provided.”
• Mitigation/Next Steps:
Tell the user what to do next. For complex issues, include an error code or documentation link.
Example: “Please update the mode; refer to our docs for valid options.”
2. Clarity & Conciseness
• Use plain, simple language and avoid unnecessary jargon (unless targeting technical users).
• Aim for short sentences (ideally 8–14 words) for better understanding.
3. Consistent Tone & Style
• Uniformity: Use the same voice, terminology, and punctuation across all messages.
• Empathy: Maintain a neutral, supportive tone; avoid blaming the user.
• Avoid overly casual language (skip “oops”/“whoops” and excessive exclamation points).
4. Visibility & Placement (User-Facing Messages)
• Proximity: Place error messages close to the related UI element to reduce cognitive load.
• Design: Use high-contrast text, icons, or subtle animations; follow accessibility guidelines (don’t rely solely on color).
5. Actionability & Efficiency
• Clearly indicate the next steps (e.g., “Retry later”, “Log in again”, “Check your input”).
• Preserve user input when possible to minimize frustration.
• Where relevant, provide error codes or links for further troubleshooting.
6. Security & Privacy Considerations
• User-Facing: Avoid exposing internal details or sensitive data.
• Developer/Logging: Include detailed context (like file paths or exception chains) for debugging, but be cautious about sensitive information.
7. Logging & Exception Best Practices (for Developer/Operations Messages)
• Log the full context—including exception chains—to aid troubleshooting.
• Use structured logging (e.g., JSON) for filtering and analysis.
• Choose a consistent method: either raise an exception or log an error (not both) to avoid redundancy.
• Don’t make error messages an API contract; expose machine-readable error codes or types instead.
8. Additional Best Practices
• Fail Early: Report errors as soon as possible (e.g., during input validation or startup).
• One Concept, One Term: Use consistent terminology across messages and documentation.
• Localization: For internal logs, use English; if localizing for users, follow a vetted process.
Pattern **/*: Whenever in a new PR a new function or code is introduced, ensure that there is at least somewhere as a code comment, in the README or wherer ever explained the "why" behind the decision. So e.g., why something was preferred over other options, or why a certain loop needs to be executed.
🔇 Additional comments (1)
opcua_plugin/browse_frontend.go (1)
163-175: Add explanation for prefix handling and test coverage.
- The comments should explain why these specific prefixes (
s=i=ands=ns=) occur and provide examples. This helps maintainers understand the root cause.- The new function lacks test coverage.
-// normalizeNodeID normalizes a node id string representation by removing unwanted 's=' prefixes -// that can occur when the nodeID type is wrongly interpreted as a string type instead of a numeric type. -// The prefix 's=' happens rarely but this function acts as a defensive mechanism to handle such scenarios +// normalizeNodeID normalizes a node id string representation by removing unwanted 's=' prefixes. +// These prefixes can occur in two scenarios: +// 1. When a numeric node ID (e.g., "i=85") is wrongly interpreted as a string type, +// resulting in "s=i=85" instead of "i=85" +// 2. When a namespace node ID (e.g., "ns=1;i=85") is wrongly interpreted as a string type, +// resulting in "s=ns=1;i=85" instead of "ns=1;i=85" +// This function acts as a defensive mechanism to handle such scenarios, which can happen when +// interacting with certain OPC UA server implementations that don't follow the specification strictly.Would you like me to help create test cases for this new function?
Nope. not yet |
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Actionable comments posted: 0
🧹 Nitpick comments (3)
opcua_plugin/browse_frontend.go (3)
127-129: Improve error message clarity.The current error message could be more helpful. Consider providing more context about why this error might occur and what actions can be taken.
- // This should never happen - // All node ids should be valid - logger.Errorf("error parsing node id: %v", err) + // This indicates a serious internal error as all node IDs should be valid at this point + // If this occurs, please check: + // 1. Node ID format in the OPC UA server + // 2. Any data transformations before this point + logger.Errorf("failed to parse normalized node ID '%s': %v", normalizedParentID, err)
163-165: Enhance function documentation.While the current comments explain what the function does, they don't fully explain why this normalization is necessary. As per coding guidelines, please add context about:
- Why this normalization is preferred over other options
- Real-world scenarios where this issue occurs
- Impact of not normalizing the IDs
-// normalizeNodeID normalizes a node id string representation by removing unwanted 's=' prefixes -// that can occur when the nodeID type is wrongly interpreted as a string type instead of a numeric type. -// The prefix 's=' happens rarely but this function acts as a defensive mechanism to handle such scenarios +// normalizeNodeID normalizes a node ID string representation by removing unwanted 's=' prefixes. +// +// Why this is needed: +// In OPC UA, node IDs can be represented in different formats (numeric, string, GUID, etc.). +// Sometimes, due to type interpretation issues in certain OPC UA servers or clients: +// 1. Numeric IDs (i=123) might be wrongly prefixed as string IDs (s=i=123) +// 2. Namespace IDs (ns=1;i=123) might be wrongly prefixed (s=ns=1;i=123) +// +// Impact of not normalizing: +// 1. Node ID comparison failures leading to broken node hierarchies +// 2. Duplicate nodes in the tree with different ID representations +// +// This normalization is preferred over strict validation because: +// 1. It's more resilient to variations in OPC UA server implementations +// 2. It maintains backward compatibility with existing systems +// 3. It follows the robustness principle (be conservative in what you send, liberal in what you accept)
166-175: Optimize and enhance the normalization logic.The function could be more efficient and robust:
- Check for the common "s=" prefix first to avoid multiple string operations
- Handle more edge cases like empty strings and nil pointers
func normalizeNodeID(nodeID *ua.NodeID) string { + if nodeID == nil { + return "" + } id := nodeID.String() + if id == "" { + return id + } + // Check for the common prefix first + if strings.HasPrefix(id, "s=") { + return strings.TrimPrefix(id, "s=") + } - if strings.HasPrefix(id, "s=i=") { - return strings.TrimPrefix(id, "s=") - } - if strings.HasPrefix(id, "s=ns=") { - return strings.TrimPrefix(id, "s=") - } return id }
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📒 Files selected for processing (1)
opcua_plugin/browse_frontend.go(3 hunks)
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📓 Path-based instructions (1)
opcua_plugin/browse_frontend.go (2)
Pattern **/*: When reviewing an error message, ensure it meets these guidelines. If a message is lacking (e.g., missing clear next steps or context), provide an example of the correct format to help improve clarity and usability.
Quick Guidelines for Writing Effective Error Messages
1. Structure Your Message with Three Key Parts
• Context:
Explain what the system was doing.
Example: “Couldn’t parse config file: /etc/sample-config.properties.”
• Error Description:
Clearly state what failed without generic wording.
Example: “Invalid snapshot mode ‘nevr’ provided.”
• Mitigation/Next Steps:
Tell the user what to do next. For complex issues, include an error code or documentation link.
Example: “Please update the mode; refer to our docs for valid options.”
2. Clarity & Conciseness
• Use plain, simple language and avoid unnecessary jargon (unless targeting technical users).
• Aim for short sentences (ideally 8–14 words) for better understanding.
3. Consistent Tone & Style
• Uniformity: Use the same voice, terminology, and punctuation across all messages.
• Empathy: Maintain a neutral, supportive tone; avoid blaming the user.
• Avoid overly casual language (skip “oops”/“whoops” and excessive exclamation points).
4. Visibility & Placement (User-Facing Messages)
• Proximity: Place error messages close to the related UI element to reduce cognitive load.
• Design: Use high-contrast text, icons, or subtle animations; follow accessibility guidelines (don’t rely solely on color).
5. Actionability & Efficiency
• Clearly indicate the next steps (e.g., “Retry later”, “Log in again”, “Check your input”).
• Preserve user input when possible to minimize frustration.
• Where relevant, provide error codes or links for further troubleshooting.
6. Security & Privacy Considerations
• User-Facing: Avoid exposing internal details or sensitive data.
• Developer/Logging: Include detailed context (like file paths or exception chains) for debugging, but be cautious about sensitive information.
7. Logging & Exception Best Practices (for Developer/Operations Messages)
• Log the full context—including exception chains—to aid troubleshooting.
• Use structured logging (e.g., JSON) for filtering and analysis.
• Choose a consistent method: either raise an exception or log an error (not both) to avoid redundancy.
• Don’t make error messages an API contract; expose machine-readable error codes or types instead.
8. Additional Best Practices
• Fail Early: Report errors as soon as possible (e.g., during input validation or startup).
• One Concept, One Term: Use consistent terminology across messages and documentation.
• Localization: For internal logs, use English; if localizing for users, follow a vetted process.
Pattern **/*: Whenever in a new PR a new function or code is introduced, ensure that there is at least somewhere as a code comment, in the README or wherer ever explained the "why" behind the decision. So e.g., why something was preferred over other options, or why a certain loop needs to be executed.
⏰ Context from checks skipped due to timeout of 90000ms (1)
- GitHub Check: go-test-opcua-plc
🔇 Additional comments (2)
opcua_plugin/browse_frontend.go (2)
102-102: LGTM!The change correctly uses the new
normalizeNodeIDfunction to normalize the node ID before storing it in the map.
124-125: LGTM!The change correctly normalizes the parent node ID before parsing, maintaining consistency with the node ID handling throughout the codebase.
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