Refactor: remove isAvailable(), make build() return Skill<*>?#415
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Stypox merged 9 commits intoMay 13, 2026
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Eliminates the race condition where a skill could be deemed available under one locale but then built/executed under a different locale after a language change. By merging the availability check into build() and returning null when the skill cannot be constructed, there is no longer a window between checking availability and building the skill where state can change. - Remove SkillInfo.isAvailable() abstract method - Change SkillInfo.build() return type from Skill<*> to Skill<*>? - Update all 15 SkillInfo implementations to return null if unavailable - Update SkillHandler to use mapNotNull for building skills - Update SkillSettingsScreen to use build() != null - Update test mocks and preview providers Addresses the root cause of the NPE in DicioTeam#412 at the architecture level.
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Thank you! I left some minor comments
Co-authored-by: Stypox <stypox@pm.me>
Co-authored-by: Stypox <stypox@pm.me>
Co-authored-by: Stypox <stypox@pm.me>
- Remove buildSkillFromInfo helper, inline fallback build
- CalculatorSkill: accept operators as constructor param, no runtime !!
- JokeSkill: accept resolved locale as constructor param, no runtime !!
- TelephoneInfo/TimerInfo: use ?: return null pattern, no !!
- FlashlightInfo: remove @SuppressLint("NewApi")
- SkillSettingsScreen: source availability from enabledSkillsInfo via
view model instead of calling build() in composable
enabledSkillsInfo only contains skills that are enabled AND available. A skill disabled by the user would incorrectly appear as unavailable (greyed out). Now disabled skills are assumed available since we cannot determine availability without building them.
mretallack
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May 12, 2026
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@Stypox thanks, new commits pushed, if you want to have a quick look to see its the right direction. |
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Thanks for addressing the comments!
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| val skills: List<SkillInfo> get() = skillHandler.allSkillInfoList | ||
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| val enabledSkillsInfo = skillHandler.enabledSkillsInfo |
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(this would have had to be a getter just like skills, or it will cache skillHandler.enabledSkillsInfo instead of always getting the latest one)
FlashlightSkill uses API 23+ camera APIs. The annotation is needed since minSdk is 21, but the call is guarded by the FEATURE_CAMERA_FLASH check which ensures the code only runs on capable devices.
…ettings screen - TelephoneSkill/TimerSkill: accept yesNoData as constructor param, pass through to ConfirmCallOutput/ConfirmCancel to eliminate runtime !! - SkillSettingsScreen: revert to build() != null for availability check with comment noting potential performance concern - Remove enabledSkillsInfo from ViewModel (no longer needed)
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LGTM, thank you!
(btw, when you pull in changes from main, I'd prefer if you rebase instead of creating a merge commit to keep the history clean; this is very minor so no worries)
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Eliminates the race condition where a skill could be deemed available under one locale but then built/executed under a different locale after a language change.
By merging the availability check into build() and returning null when the skill cannot be constructed, there is no longer a window between checking availability and building the skill where state can change.
Addresses the root cause of the NPE in #412 at the architecture level.