Enhance contenet management data perfetching performance #55
Conversation
- Implement loading of countries and languages in ContentManagementBloc - Add SharedDataRequested event - Extend ContentManagementState to include countries and languages data - Implement fetchAll helper function for efficient data retrieval - Add error handling for data loading operations
…er data request - Inject countriesRepository and languagesRepository into SharedDataBloc - Dispatch SharedDataRequested event after bloc initialization - Update dependencies in App widget
- Remove background fetching mechanism for countries list - Load all countries at once in CreateHeadlineBloc initialization - Remove unnecessary country-related state properties from CreateHeadlineState - Update CreateHeadlinePage to use pre-loaded countries list - Remove _FetchNextCountryPage event and related handling
- Remove background fetching mechanism for countries list - Load all countries at once in EditHeadlineBloc initialization - Update EditHeadlineState to remove pagination-related variables - Modify EditHeadlinePage to use a predefined list of countries - Remove loading indicator and related logic from the dropdown
…ling - Remove pagination and background fetching for countries and languages - Load full lists of countries and languages at once - Cache countries and languages in ContentManagementBloc - Update CreateSourceBloc to use cached lists - Simplify UI logic for dropdowns
- Remove pagination and background fetching for countries and languages - Load full lists of countries and languages at once - Cache countries and languages in ContentManagementBloc - Update EditSourceBloc to use cached lists - Simplify UI by removing loading indicators for dropdowns
…etching - Add comments explaining the background data fetching mechanism for countries and languages - Clarify the purpose of this mechanism in relation to UI consistency and DropdownButtonFormField limitations
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Summary of Changes
Hello @fulleni, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
I've refactored the content management section to enhance data pre-fetching performance. The primary change involves centralizing the fetching and caching of common, static data like countries and languages within the ContentManagementBloc. This allows other BLoCs, particularly those responsible for creating and editing headlines and sources, to receive this data pre-loaded, significantly simplifying their logic and improving overall application responsiveness by reducing redundant API calls and complex pagination handling in multiple places.
Highlights
- Centralized Data Management: Implemented a new
SharedDataRequestedevent and handler withinContentManagementBlocto pre-fetch and cache all active countries and languages. This centralizes the fetching of common dropdown data. - Streamlined BLoC Initialization: Modified
CreateHeadlineBloc,CreateSourceBloc,EditHeadlineBloc, andEditSourceBlocto receive pre-fetched lists of countries and languages directly during their initialization, eliminating their previous responsibilities for fetching and paginating this data. - Reduced Complexity in Child BLoCs: Removed background data fetching logic, related state properties (e.g.,
countriesHasMore,languagesIsLoadingMore), and associated UI helper texts from theCreateandEditBLoCs and their respective views, simplifying their implementation. - Performance Improvement: By pre-fetching and caching frequently used data, the application reduces the number of API calls and simplifies data access patterns, leading to improved performance and responsiveness, especially for forms with many dropdowns.
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…-performance Signed-off-by: fulleni <[email protected]>
fulleni
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Code Review
This pull request refactors data fetching for dropdowns (countries, languages) by centralizing it in ContentManagementBloc for better performance. This is a great improvement to avoid redundant network calls on different screens.
My review focuses on ensuring the refactoring is complete and doesn't introduce regressions. I've found a few issues:
- A potential bug in the edit screens where selected dropdown values might not be displayed correctly due to the refactoring.
- Incorrect retry logic on the creation screen.
- Some suggestions to improve code quality and maintainability in the new data fetching logic.
Overall, the direction is excellent, and with a few fixes, this will be a solid enhancement.
Status
READY/IN DEVELOPMENT/HOLD
Description
Type of Change