collections/triple.go (8)

Line range hint 88-106: Revise function comments to follow Go conventions

The comment for EncodeJSON should begin with the function name and be a complete sentence. According to Go conventions, it should be:

// EncodeJSON converts triple keys to JSON.

Please update the comment to match this style.

---

Line range hint 88-106: Handle nil pointers to prevent potential panics

In the EncodeJSON method, dereferencing *value.k1, *value.k2, and *value.k3 without checking if they are nil can lead to panics if any of the keys are nil. To prevent this, add nil checks before dereferencing:

func (t tripleKeyCodec[K1, K2, K3]) EncodeJSON(value Triple[K1, K2, K3]) ([]byte, error) {
	var json1, json2, json3 []byte
	var err error

	if value.k1 != nil {
		json1, err = t.keyCodec1.EncodeJSON(*value.k1)
		if err != nil {
			return nil, err
		}
	} else {
		json1 = []byte("null")
	}

	if value.k2 != nil {
		json2, err = t.keyCodec2.EncodeJSON(*value.k2)
		if err != nil {
			return nil, err
		}
	} else {
		json2 = []byte("null")
	}

	if value.k3 != nil {
		json3, err = t.keyCodec3.EncodeJSON(*value.k3)
		if err != nil {
			return nil, err
		}
	} else {
		json3 = []byte("null")
	}

	return json.Marshal(jsonTripleKey{json1, json2, json3})
}

---

Line range hint 108-132: Revise function comments to follow Go conventions

The comment for DecodeJSON should begin with the function name and be a complete sentence. It should be:

// DecodeJSON converts JSON to triple keys.

Please update the comment accordingly.

---

Line range hint 108-132: Validate JSON array length to prevent index out of range errors

In DecodeJSON, after unmarshalling, ensure that the JSON array has exactly three elements to prevent potential index out of range errors:

if len(jsonKey) != 3 {
	return Triple[K1, K2, K3]{}, fmt.Errorf("expected JSON array of length 3")
}

---

Line range hint 108-132: Handle null values during JSON decoding to support optional keys

If the JSON array contains null values, decoding into keys without handling null can cause errors. Modify the decoding to handle null values:

var key1 K1
if string(jsonKey[0]) != "null" {
	key1, err = t.keyCodec1.DecodeJSON(jsonKey[0])
	if err != nil {
		return Triple[K1, K2, K3]{}, err
	}
}

var key2 K2
if string(jsonKey[1]) != "null" {
	key2, err = t.keyCodec2.DecodeJSON(jsonKey[1])
	if err != nil {
		return Triple[K1, K2, K3]{}, err
	}
}

var key3 K3
if string(jsonKey[2]) != "null" {
	key3, err = t.keyCodec3.DecodeJSON(jsonKey[2])
	if err != nil {
		return Triple[K1, K2, K3]{}, err
	}
}

return Triple[K1, K2, K3]{&key1, &key2, &key3}, nil

---

Line range hint 134-170: Revise function comments to follow Go conventions

The comment for Stringify should begin with the function name and be a complete sentence:

// Stringify converts triple keys to a string.

Please adjust the comment to follow this format.

---

Line range hint 134-170: Simplify string concatenation using fmt.Sprintf for readability

Refactor the Stringify method to use fmt.Sprintf, enhancing readability and maintainability:

func (t tripleKeyCodec[K1, K2, K3]) Stringify(key Triple[K1, K2, K3]) string {
	k1Str := "<nil>"
	if key.k1 != nil {
		k1Str = fmt.Sprintf(`"%s"`, t.keyCodec1.Stringify(*key.k1))
	}
	k2Str := "<nil>"
	if key.k2 != nil {
		k2Str = fmt.Sprintf(`"%s"`, t.keyCodec2.Stringify(*key.k2))
	}
	k3Str := "<nil>"
	if key.k3 != nil {
		k3Str = fmt.Sprintf(`"%s"`, t.keyCodec3.Stringify(*key.k3))
	}
	return fmt.Sprintf("(%s, %s, %s)", k1Str, k2Str, k3Str)
}

---

Line range hint 88-106: Wrap errors with additional context per style guidelines

When returning errors, wrap them with context to improve debuggability, following the Uber Go Style Guide:

if err != nil {
	return nil, fmt.Errorf("failed to encode key1: %w", err)
}

Apply similar error wrapping in other error handling blocks.

Also applies to: 108-132, 134-170

collections/quad.go (9)

Line range hint 110-133: Potential nil pointer dereference in EncodeJSON method

In the EncodeJSON method, the fields value.k1, value.k2, value.k3, and value.k4 are dereferenced without checking if they are nil. Since these fields are pointers, if any of them are nil, this could lead to a runtime panic. Consider adding nil checks before dereferencing to ensure robustness.

Apply this diff to add nil checks:

 func (t quadKeyCodec[K1, K2, K3, K4]) EncodeJSON(value Quad[K1, K2, K3, K4]) ([]byte, error) {
+    if value.k1 == nil || value.k2 == nil || value.k3 == nil || value.k4 == nil {
+        return nil, fmt.Errorf("one of the Quad keys is nil")
+    }
     json1, err := t.keyCodec1.EncodeJSON(*value.k1)
     if err != nil {
         return nil, err
     }
     // ... rest of the code ...
 }

---

110-110: Adjust function comment to follow Go conventions

The comment for EncodeJSON should start with the function name and be a complete sentence, as per the Uber Go Style Guide. Consider rephrasing it to:

// EncodeJSON encodes a Quad into JSON format.

---

135-135: Adjust function comment to follow Go conventions

The comment for DecodeJSON should start with the function name and be a full sentence. Consider rephrasing it to:

// DecodeJSON decodes JSON data into a Quad.

---

Line range hint 135-164: Potential issue with nil pointers in DecodeJSON method

In the DecodeJSON method, although it's unlikely, there is a possibility that jsonKey may not contain all four elements due to malformed input. Accessing jsonKey[0] to jsonKey[3] without bounds checking could lead to an index out of range panic. Consider adding a check to ensure that jsonKey has exactly four elements before proceeding.

Apply this diff to add a length check:

 func (t quadKeyCodec[K1, K2, K3, K4]) DecodeJSON(b []byte) (Quad[K1, K2, K3, K4], error) {
     var jsonKey jsonQuadKey
     err := json.Unmarshal(b, &jsonKey)
     if err != nil {
         return Quad[K1, K2, K3, K4]{}, err
     }
+    if len(jsonKey) != 4 {
+        return Quad[K1, K2, K3, K4]{}, fmt.Errorf("expected 4 elements in JSON array, got %d", len(jsonKey))
+    }
     key1, err := t.keyCodec1.DecodeJSON(jsonKey[0])
     // ... rest of the code ...
 }

---

166-166: Adjust function comment to follow Go conventions

The comment for Stringify should start with the function name and be a complete sentence. Consider rephrasing it to:

// Stringify converts a Quad into its string representation.

---

Line range hint 213-246: Consider refactoring to reduce code duplication in Encode method

The Encode method has repetitive code blocks for each key. To improve maintainability and adhere to the DRY (Don't Repeat Yourself) principle, consider refactoring the code by extracting the repeated logic into a helper function or by using a loop over the keys.

Here’s an example using a helper function:

func (t quadKeyCodec[K1, K2, K3, K4]) encodeKey(buffer []byte, key interface{}, codec interface{}, isTerminal bool) (int, error) {
    // Implement encoding logic based on isTerminal flag
}

func (t quadKeyCodec[K1, K2, K3, K4]) Encode(buffer []byte, key Quad[K1, K2, K3, K4]) (int, error) {
    writtenTotal := 0
    // Call encodeKey for each key.k1 to key.k4
}

---

Line range hint 247-278: Ensure consistent error handling in Decode method

In the Decode method, errors are immediately returned with minimal context. To provide better error messages, consider wrapping the errors with additional context using fmt.Errorf or errors.Wrap.

Apply this diff to enhance error messages:

 if err != nil {
-    return 0, Quad[K1, K2, K3, K4]{}, err
+    return 0, Quad[K1, K2, K3, K4]{}, fmt.Errorf("failed to decode key1: %w", err)
 }

---

Line range hint 279-312: Reduce duplication between Encode and EncodeNonTerminal methods

The EncodeNonTerminal method shares similar logic with Encode. Refactoring to share common code will enhance readability and maintainability.

Consider combining the methods or extracting shared logic, similar to the suggestion for the Encode method.

---

Line range hint 213-246: Adhere to Uber Go Style Guide on error handling and return values

Per the Uber Go Style Guide, when returning errors, it's recommended to wrap them with context. Additionally, ensure that the ordering of return values is consistent.

Also applies to: 279-312

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