73c74119f0
* Moving model-store into “generic” sub-directory. Also adding a README.md to explain what belongs in “generic” * Moving user-messages into “generic” sub-directory. * Moving PageLoading into “generic” sub-directory. * Moving “tabs” module into “generic” sub-directory. * Moving InstructorToolbar and MasqueradeWidget up to instructor-toolbar. The masquerade widget is a sub-module of instructor-toolbar. * Co-locating celebration APIs with celebration utils. Also adding an ADR about thunk/API naming conventions and making some other areas of the code adhere to it. * Moving courseware data (thunks, api) into the courseware module. Note that cousre-home/data/api still uses normalizeBlocks - this should be fixed so it’s not reaching across. Maybe we pull that particular API up top. This PR includes a few TODOs for things I saw, as well as a tiny bit of whitespace cleanup.
25 lines
1.2 KiB
JavaScript
25 lines
1.2 KiB
JavaScript
/* eslint-disable import/prefer-default-export */
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import { useSelector } from 'react-redux';
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import { useModel } from '../../../../generic/model-store';
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import { sequenceIdsSelector } from '../../../data/selectors';
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export function useSequenceNavigationMetadata(currentSequenceId, currentUnitId) {
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const sequenceIds = useSelector(sequenceIdsSelector);
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const sequence = useModel('sequences', currentSequenceId);
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const courseStatus = useSelector(state => state.courseware.courseStatus);
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// If we don't know the sequence and unit yet, then assume no.
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if (courseStatus !== 'loaded' || !currentSequenceId || !currentUnitId) {
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return { isFirstUnit: false, isLastUnit: false };
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}
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const isFirstSequence = sequenceIds.indexOf(currentSequenceId) === 0;
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const isFirstUnitInSequence = sequence.unitIds.indexOf(currentUnitId) === 0;
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const isFirstUnit = isFirstSequence && isFirstUnitInSequence;
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const isLastSequence = sequenceIds.indexOf(currentSequenceId) === sequenceIds.length - 1;
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const isLastUnitInSequence = sequence.unitIds.indexOf(currentUnitId) === sequence.unitIds.length - 1;
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const isLastUnit = isLastSequence && isLastUnitInSequence;
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return { isFirstUnit, isLastUnit };
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}
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