Refactor parser #50
Refactor parser #50
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WalkthroughThe changes introduced in this pull request primarily focus on a significant refactor of the Changes
Sequence Diagram(s)sequenceDiagram
participant User
participant IanaParser
participant ErrorHandler
User->>IanaParser: Request to parse time zone
IanaParser->>IanaParser: Process input
alt Error Occurs
IanaParser->>ErrorHandler: Handle error
ErrorHandler-->>IanaParser: Return structured error response
else Success
IanaParser-->>User: Return parsed time zone
end
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Files skipped from review as they are similar to previous changes (1)
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Actionable comments posted: 0
Outside diff range and nitpick comments (1)
lib/time_zone_info/iana_parser/helper.ex (1)
88-110: LGTM!The
choice_word_mapfunction provides a flexible way to match string prefixes against a map, which is useful for parsing month and day names. The error handling for no matches and multiple matches is appropriate.To further improve the function, consider making it case-insensitive by converting the input string to lowercase before matching against the map keys:
def choice_map(rest, [args], context, _line, _offset, map) do - string = String.downcase(args) + string = String.downcase(args) values = Enum.reduce(map, [], fn {key, value}, acc -> - if String.starts_with?(key, string), do: [value | acc], else: acc + if String.starts_with?(String.downcase(key), string), do: [value | acc], else: acc end) case values do [value] -> {rest, [value], context} [] -> {:error, :invalid} [_ | _] -> {:error, :ambiguous} end end
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Files selected for processing (5)
- CHANGELOG.md (1 hunks)
- lib/time_zone_info/iana_parser.ex (1 hunks)
- lib/time_zone_info/iana_parser/helper.ex (5 hunks)
- mix.exs (1 hunks)
- test/time_zone_info/iana_parser_test.exs (4 hunks)
Files skipped from review due to trivial changes (1)
- mix.exs
Additional context used
LanguageTool
CHANGELOG.md
[misspelling] ~7-~7: This word is normally spelled with a hyphen.
Context: ...ic`: Names must be in English and are case insensitive. They appear in several contexts, an...(EN_COMPOUNDS_CASE_INSENSITIVE)
GitHub Check: Test on Ubuntu (Elixir 1.16.2, OTP 26.2)
lib/time_zone_info/iana_parser.ex
[warning] 144-144: pattern_match
The pattern can never match the type {:ok, [any(), ...], binary(), map(), {pos_integer(), pos_integer()}, pos_integer()}.
Additional comments not posted (13)
CHANGELOG.md (1)
3-11: Excellent changelog entry!The changelog entry for version 0.7.6 provides a clear and detailed description of the refactor to
TimeZoneInfo.IanaParser. It references thezicmanual to explain the correct handling of names, including important details such as:
- Names must be in English and case-insensitive.
- Names can appear in various contexts like month and weekday names, and keywords.
- Names can be abbreviated if unambiguous in context.
This level of detail helps users understand the scope and impact of the refactor. Well done!
Tools
LanguageTool
[misspelling] ~7-~7: This word is normally spelled with a hyphen.
Context: ...ic`: Names must be in English and are case insensitive. They appear in several contexts, an...(EN_COMPOUNDS_CASE_INSENSITIVE)
lib/time_zone_info/iana_parser.ex (1)
143-145: Improved error handling looks good!The addition of the new clause for handling the
{:error, _reason, rest, _context, {line, _position}, byte_offset}case is a valuable improvement to theparse/1function. It ensures that all error scenarios are properly captured and reported, providing clearer feedback when parsing fails.Regarding the warning from the static analysis tool at line 144, it appears to be a false positive. The new clause correctly matches the error tuple returned by
do_parse/1in the error case, which was not accounted for in the original code. The tool seems to incorrectly assume that the success case is the only possible return type. This warning can be safely ignored.Tools
GitHub Check: Test on Ubuntu (Elixir 1.16.2, OTP 26.2)
[warning] 144-144: pattern_match
The pattern can never match the type {:ok, [any(), ...], binary(), map(), {pos_integer(), pos_integer()}, pos_integer()}.lib/time_zone_info/iana_parser/helper.ex (3)
132-132: LGTM!The change to use
choice_word_map(@month)is consistent with the introduction of the newchoice_word_mapfunction and is unlikely to affect the functionality of themonthfunction.
143-144: LGTM!The change to use
choice_word_map(@day)is consistent with the introduction of the newchoice_word_mapfunction and is unlikely to affect the functionality of theonfunction.
321-323: LGTM!The change to use
choice_word_map(@to_year)simplifies the parsing logic for the "to" field and is consistent with the introduction of the newchoice_word_mapfunction.test/time_zone_info/iana_parser_test.exs (8)
7-102: LGTM!The module attributes
@rules_germanyand@rules_germany_parsedare well-structured and accurately represent the Germany time zone rules and their expected parsed output. Using these attributes for storing test data and expected results is a good practice for improving test readability and maintainability.
148-151: LGTM!The added lines representing specific rules for the
EUtime zone are consistent with the format and style of the existing rules in the test case. The changes are minor and do not affect the overall structure or purpose of the test case.
221-224: LGTM!The new test case for parsing the Germany time zone rules is well-structured and follows the existing test format in the file. Using the
@rules_germanyand@rules_germany_parsedmodule attributes for test data and expected results improves readability and maintainability. The test case provides good coverage for parsing the Germany time zone rules.
227-231: LGTM!The new test case for parsing the Germany time zone rules with full month and day names is well-structured and follows the existing test format in the file. Using the
replace_all/2helper function to modify the test data is a good approach for testing different variations of the input. The test case provides additional coverage for parsing the Germany time zone rules with full month and day names.
233-238: LGTM!The new test case for parsing the Germany time zone rules with month and day names mixed by upper and lower case is well-structured and follows the existing test format in the file. Using the
replace_all/2helper function to modify the test data is a good approach for testing different variations of the input. The test case provides additional coverage for parsing the Germany time zone rules with mixed case month and day names, ensuring case-insensitivity.
240-245: LGTM!The new test case for parsing the Germany time zone rules with month and day names reduced to their minimum forms is well-structured and follows the existing test format in the file. Using the
replace_all/2helper function to modify the test data is a good approach for testing different variations of the input. The test case provides additional coverage for parsing the Germany time zone rules with month and day names reduced to their minimum forms, ensuring flexibility in input handling.
247-251: LGTM!The three new test cases for error handling in the
IanaParsermodule are well-structured and follow the existing test format in the file. The test cases cover scenarios with ambiguous names, invalid names, and invalid characters in the time zone rules, providing good coverage for error handling. The use ofString.replace/3to modify the test data is appropriate for introducing specific error scenarios. The assertions verify that theIanaParser.parse/1function returns the expected error tuples with the correct error details.Also applies to: 253-257, 259-262
609-615: LGTM!The
replace_all/2private helper function is a useful utility for replacing multiple patterns in a string with their corresponding replacements. The function is well-structured and uses appropriate Elixir functions and constructs. The use ofEnum.reduce/3andString.replace/4with theglobal: trueoption ensures that all occurrences of each pattern are replaced in the string. The function is used effectively in the test cases to modify the test data for different scenarios.
Summary by CodeRabbit
New Features
Bug Fixes
Documentation
Tests