aswi20220x00-gitlab/webapp/contexts/AnnotationContext.tsx @ 9a41c02f

import React, { createContext, useEffect, useState } from 'react';
import { AnnotationInfo, TagInstanceInfo } from '../api';
import { Tag } from '../components/types/tag';
import { annotationController } from '../controllers';

/**
 * Interface of an annotation context provider.
 */
interface IAnnotationContextProvider {
    /**
     * Tags managed by the context.
     */
    tags: TagInstanceInfo[] | null;

    /**
     * Sets new tags.
     * @param newTags An array of new tags.
     */
    setTags: (newTags: TagInstanceInfo[] | null) => void;

    /**
     * Adds occurrence to an annotation.
     * @param tag Tag whose occurrence should be added.
     */
    addOccurrence: (tag: Tag) => void;

    /**
     * Changes visibility of an annotation.
     * @param tag Tag whose visibility should be changed.
     */
    changeVisibility: (tag: Tag) => void;

    /**
     * Deletes an occurrence of an annotation.
     * @param occurrence Occurrence that should be deleted.
     */
    deleteOccurrence: (occurrence: TagInstanceInfo) => void;

    /**
     * Changes a position of an occurrence of an annotation.
     * @param occurrence Occurrence whose position should be changed.
     * @param newValue New value of the position.
     */
    changePosition: (occurrence: TagInstanceInfo, newValue: number) => void;

    /**
     * Changes a length of an occurrence of an annotation.
     * @param occurrence Occurrence whose length should be changed.
     * @param newValue New value of the length.
     */
    changeLength: (occurrence: TagInstanceInfo, newValue: number) => void;

    annotation: AnnotationInfo | null;
    mappedTags: Tag[] | null;
    refreshAnnotation: () => void;
}

/**
 * The annotation context that manages active annotations.
 */
export const AnnotationContext = createContext<IAnnotationContextProvider>({
    /**
     * Default tags.
     */
    tags: null,

    /**
     * Default implementation of setTags method.
     * @param v Array of new tags.
     */
    setTags: (v) => {
        return;
    },

    /**
     * Default implementation of addOccurrence method.
     * @param tag The tag with new occurrence.
     */
    addOccurrence: (tag: Tag) => {
        return;
    },

    /**
     * Default implementation of changeVisibility method.
     * @param tag The tag whose visibility should be changed.
     */
    changeVisibility: (tag: Tag) => {
        return;
    },

    /**
     * Default implementation of deleteOccurrence method.
     * @param occurrence Occurrence that should be deleted.
     */
    deleteOccurrence: (occurrence: TagInstanceInfo) => {
        return;
    },

    /**
     * Default implementation of changePosition method.
     * @param occurrence Occurrence whose position should be changed.
     * @param newValue A new position.
     */
    changePosition: (occurrence: TagInstanceInfo, newValue: number) => {
        return;
    },

    /**
     * Default implementation of changeLength method.
     * @param occurrence Occurrence whose length should be changed.
     * @param newValue A new length.
     */
    changeLength: (occurrence: TagInstanceInfo, newValue: number) => {
        return;
    },

    annotation: null,
    mappedTags: null,
    refreshAnnotation: () => {
        return;
    },
});

/**
 * Provider of the annotation context.
 * @param props Children that should have access to the annotation context.
 * @returns Prepared html of the provider.
 */
const AnnotationProvider = (props: {
    children: React.ReactNode;
    annotationId: string;
}) => {
    const [annotation, setAnnotation] = useState<AnnotationInfo | null>(null);

    /**
     * Tags managed by the context.
     */
    const [tags, setTags] = useState<TagInstanceInfo[] | null>(null);

    const [mappedTags, setMappedTags] = useState<Tag[] | null>(null);

    /**
     * Default implementation of addOccurrence method.
     * @param tag The tag with new occurrence.
     */
    const addOccurrence = (tag: Tag) => {
        //TODO: Implement method (should use objects from server API)
    };

    /**
     * Changes visibility of an annotation.
     * @param tag Tag whose visibility should be changed.
     */
    const changeVisibility = (tag: Tag) => {
        //TODO: Implement method (should use objects from server API)
    };

    /**
     * Deletes an occurrence of an annotation.
     * @param occurrence Occurrence that should be deleted.
     */
    const deleteOccurrence = (occurrence: TagInstanceInfo) => {
        //TODO: Implement method (should use objects from server API)
    };

    /**
     * Changes a position of an occurrence of an annotation.
     * @param occurrence Occurrence whose position should be changed.
     * @param newValue New value of the position.
     */
    const changePosition = (occurrence: TagInstanceInfo, newValue: number) => {
        //TODO: Implement method (should use objects from server API)
    };

    /**
     * Changes a length of an occurrence of an annotation.
     * @param occurrence Occurrence whose length should be changed.
     * @param newValue New value of the length.
     */
    const changeLength = (occurrence: TagInstanceInfo, newValue: number) => {
        //TODO: Implement method (should use objects from server API)
    };

    const remapAnnotations = (data: AnnotationInfo) => {
        let map = new Map<number, Tag>();
        data.tagInstances?.forEach((tagInstance) => {
            if (map.has(tagInstance.instance ?? 0)) {
                let tag = map.get(tagInstance.instance ?? 0);
                tag!.occurrences = [...tag!.occurrences, tagInstance];
            } else {
                map.set(tagInstance.position ?? 0, {
                    name: tagInstance.tagName ?? '',
                    category: tagInstance.tagCategoryName ?? '',
                    visible: true,
                    occurrences: [tagInstance],
                });
            }
        });

        setMappedTags(Array.from(map.values()));
    };

    async function refreshAnnotation() {
        const data = await annotationController.annotationAnnotationIdGet(
            props.annotationId
        );

        remapAnnotations(data.data);
        setAnnotation(data.data ?? null);
    }

    /**
     * Initializes the context.
     */
    useEffect(() => {
        refreshAnnotation();
    }, [props.annotationId]);

    return (
        <AnnotationContext.Provider
            value={{
                tags,
                setTags,
                addOccurrence,
                changeVisibility,
                deleteOccurrence,
                changeLength,
                changePosition,
                refreshAnnotation,
                annotation,
                mappedTags,
            }}
        >
            {props.children}
        </AnnotationContext.Provider>
    );
};

export default AnnotationProvider;