refactor: replace magic strings with command constants (fixes #4) #81
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WalkthroughReplaced hard-coded command string literals in Changes
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src/main/java/com/mycmd/App.java (1)
45-45: Replace hardcoded "help" with constant for consistency.The string
"help"is hardcoded in this error message, which is inconsistent with the refactoring goal. UseCommandNames.HELPinstead to maintain consistency and reduce the risk of typos.Apply this diff:
- System.out.println("Unknown command: '" + cmd + "'. Enter 'help' to list all available commands."); + System.out.println("Unknown command: '" + cmd + "'. Enter '" + CommandNames.HELP + "' to list all available commands.");
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src/main/java/com/mycmd/App.java (2)
78-110: Well-organized constant declarations.The constant names follow proper Java naming conventions (UPPER_CASE) and the value alignment enhances readability. The comprehensive list covers all commands consistently.
112-144: Excellent refactoring of command registration.All magic strings have been successfully replaced with constants. The refactor is consistent throughout the method and significantly improves maintainability by centralizing command names.
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src/main/java/com/mycmd/App.java (1)
78-109: Consider making constants private for consistency.While the
CommandNamesclass is correctly declared asprivate static final, the constants inside are declaredpublic. Since the class itself is private, these constants are not accessible outsideAppregardless of their access modifier. For semantic clarity and consistency, consider declaring them asprivate static finalinstead.Apply this diff to update the visibility:
- public static final String DIR = "dir"; - public static final String CD = "cd"; - public static final String ECHO = "echo"; + private static final String DIR = "dir"; + private static final String CD = "cd"; + private static final String ECHO = "echo";(Apply the same change to all remaining constants in the class.)
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src/main/java/com/mycmd/App.java (2)
112-144: Excellent refactor—magic strings eliminated successfully.All hard-coded command strings have been replaced with references to
CommandNamesconstants. This centralizes command name management, improves maintainability, and reduces the risk of typos. The implementation is clean and consistent.
45-45: Good attention to detail—user-facing message updated consistently.Updating the error message to reference
CommandNames.HELPinstead of the hard-coded "help" string demonstrates thorough refactoring. This ensures consistency and automatic propagation of any future changes to the command name.
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Hello @HossamSaberr. Can you please once resolve the conflicts and see suggestion given by Coderabbit |
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🧹 Nitpick comments (1)
src/main/java/com/mycmd/App.java (1)
76-112: Excellent refactoring! Previous feedback addressed.The
CommandNamesclass is now properly declared asprivate static finalwith a private constructor, successfully centralizing all command names as constants. This addresses the previous review feedback and fulfills the PR objectives.Optional: Consider alphabetical ordering for easier navigation.
The constants could be sorted alphabetically to make it easier to locate specific commands when maintaining the list:
private static final class CommandNames { private CommandNames() {} - private static final String DIR = "dir"; - private static final String CD = "cd"; + private static final String ALIAS = "alias"; + private static final String CD = "cd"; + private static final String CLEARHISTORY = "clearhistory"; + private static final String CLS = "cls"; + private static final String COLOR = "color"; + private static final String COPY = "copy"; + private static final String DATE = "date"; + private static final String DEL = "del"; + private static final String DIR = "dir"; private static final String ECHO = "echo"; - private static final String MKDIR = "mkdir"; - private static final String RMDIR = "rmdir"; - private static final String COPY = "copy"; - private static final String DEL = "del"; - private static final String TYPE = "type"; - private static final String CLS = "cls"; + private static final String EXIT = "exit"; private static final String HELP = "help"; - private static final String EXIT = "exit"; - private static final String VER = "ver"; - private static final String TITLE = "title"; - private static final String COLOR = "color"; + private static final String HISTORY = "history"; private static final String HOSTNAME = "hostname"; - private static final String WHOAMI = "whoami"; - private static final String TOUCH = "touch"; + private static final String IPCONFIG = "ipconfig"; + private static final String MKDIR = "mkdir"; + private static final String PAUSE = "pause"; + private static final String PING = "ping"; + private static final String PWD = "pwd"; + private static final String RENAME = "rename"; + private static final String RMDIR = "rmdir"; + private static final String SET = "set"; + private static final String SYSTEMINFO = "systeminfo"; + private static final String TASKLIST = "tasklist"; + private static final String TELNET = "telnet"; private static final String TIME = "time"; - private static final String TASKLIST = "tasklist"; + private static final String TITLE = "title"; + private static final String TOUCH = "touch"; private static final String TREE = "tree"; - private static final String DATE = "date"; - private static final String HISTORY = "history"; - private static final String PING = "ping"; - private static final String TELNET = "telnet"; - private static final String PWD = "pwd"; + private static final String TYPE = "type"; + private static final String UNALIAS = "unalias"; private static final String UPTIME = "uptime"; - private static final String CLEARHISTORY = "clearhistory"; - private static final String IPCONFIG = "ipconfig"; - private static final String ALIAS = "alias"; - private static final String UNALIAS = "unalias"; - private static final String RENAME = "rename"; - private static final String SET = "set"; - private static final String SYSTEMINFO = "systeminfo"; - private static final String PAUSE = "pause"; + private static final String VER = "ver"; + private static final String WHOAMI = "whoami"; }
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src/main/java/com/mycmd/App.java (2)
45-45: LGTM! Magic string successfully replaced.The hardcoded "help" string has been correctly replaced with
CommandNames.HELP, maintaining consistency with the refactoring objectives.
114-149: Perfect implementation of the refactoring objectives!All 35 command registrations now correctly use
CommandNamesconstants instead of hardcoded strings. This eliminates the risk of typos, centralizes command name management, and significantly improves maintainability—exactly as specified in issue #4.
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🚀 Hi @HossamSaberr! Thank you for contributing to MyCMD. A maintainer will review your PR shortly. 🎉 |
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🚀 Hi @HossamSaberr! Thank you for contributing to MyCMD. A maintainer will review your PR shortly. 🎉 |
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🧹 Nitpick comments (1)
src/main/java/com/mycmd/App.java (1)
78-111: Consider consistent spacing for better readability.The constant declarations are functionally correct, but the spacing before the equals signs is inconsistent. While this doesn't affect behavior, aligning them uniformly would improve visual consistency.
Example alignment:
- private static final String ALIAS = "alias"; - private static final String CD = "cd"; - private static final String CLEARHISTORY = "clearhistory"; + private static final String ALIAS = "alias"; + private static final String CD = "cd"; + private static final String CLEARHISTORY = "clearhistory";Or remove extra spacing entirely:
- private static final String ALIAS = "alias"; + private static final String ALIAS = "alias";
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src/main/java/com/mycmd/App.java(2 hunks)
🔇 Additional comments (3)
src/main/java/com/mycmd/App.java (3)
45-45: Good use of the constant for consistency.The unknown command message now references
CommandNames.HELPinstead of a hard-coded string, ensuring consistency with the registered command name.
76-77: Previous concern properly addressed.The
CommandNamesclass is now correctly declared asprivate static finalwith a private constructor, addressing the previous reviewer's feedback. This ensures the constants are not exposed outside theAppclass and follows best practices for constant holder classes.
114-149: Excellent refactoring that achieves the PR objectives.All command registrations now use the
CommandNamesconstants instead of string literals. This successfully:
- Centralizes command names in a single location
- Eliminates magic strings throughout the registration code
- Reduces the risk of typos in command names
- Makes future command name changes easier to manage
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🚀 Hi @HossamSaberr! Thank you for contributing to MyCMD. A maintainer will review your PR shortly. 🎉 |
anshumanjadiya1102
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I saw this issue hadn’t been updated in a while, so I went ahead and opened a PR to help move it forward.
Replaced all hard-coded command names in
registerCommandswith constants to make the code easier to maintain.Commands like
"dir","cd","echo", etc., are now defined once at the top of the class and referenced everywhere they’re used.No behavior changes — just a small cleanup for readability and consistency.
Fixes #4
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