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import { action, observable, observe } from 'mobx';
import { computedFn } from 'mobx-utils';
import { DirectLinksSym, Doc, DocListCast, DocListCastAsync, Field, Opt } from '../../fields/Doc';
import { List } from '../../fields/List';
import { ProxyField } from '../../fields/Proxy';
import { Cast, StrCast } from '../../fields/Types';
/*
* link doc:
* - anchor1: doc
* - anchor2: doc
*
* group doc:
* - type: string representing the group type/name/category
* - metadata: doc representing the metadata kvps
*
* metadata doc:
* - user defined kvps
*/
export class LinkManager {
@observable static _instance: LinkManager;
@observable static userLinkDBs: Doc[] = [];
@observable public static currentLink: Opt<Doc>;
@observable public static currentLinkAnchor: Opt<Doc>;
public static get Instance() {
return LinkManager._instance;
}
public static addLinkDB = (linkDb: any) => LinkManager.userLinkDBs.push(linkDb);
public static AutoKeywords = 'keywords:Usages';
static links: Doc[] = [];
constructor() {
LinkManager._instance = this;
this.createLinkrelationshipLists();
LinkManager.userLinkDBs = [];
const addLinkToDoc = (link: Doc) => {
const a1Prom = link?.anchor1;
const a2Prom = link?.anchor2;
Promise.all([a1Prom, a2Prom]).then(all => {
const a1 = all[0];
const a2 = all[1];
const a1ProtoProm = (link?.anchor1 as Doc)?.proto;
const a2ProtoProm = (link?.anchor2 as Doc)?.proto;
Promise.all([a1ProtoProm, a2ProtoProm]).then(
action(all => {
if (a1 instanceof Doc && a2 instanceof Doc && ((a1.author !== undefined && a2.author !== undefined) || link.author === Doc.CurrentUserEmail)) {
Doc.GetProto(a1)[DirectLinksSym].add(link);
Doc.GetProto(a2)[DirectLinksSym].add(link);
//Doc.GetProto(link)[DirectLinksSym].add(link); // bcz: links are not linked to themself, so this was a hack
}
})
);
});
};
const remLinkFromDoc = (link: Doc) => {
const a1 = link?.anchor1;
const a2 = link?.anchor2;
Promise.all([a1, a2]).then(
action(() => {
if (a1 instanceof Doc && a2 instanceof Doc && ((a1.author !== undefined && a2.author !== undefined) || link.author === Doc.CurrentUserEmail)) {
Doc.GetProto(a1)[DirectLinksSym].delete(link);
Doc.GetProto(a2)[DirectLinksSym].delete(link);
Doc.GetProto(link)[DirectLinksSym].delete(link);
}
})
);
};
const watchUserLinkDB = (userLinkDBDoc: Doc) => {
LinkManager.links.push(...DocListCast(userLinkDBDoc.data));
const toRealField = (field: Field) => (field instanceof ProxyField ? field.value : field); // see List.ts. data structure is not a simple list of Docs, but a list of ProxyField/Fields
if (userLinkDBDoc.data) {
observe(
userLinkDBDoc.data,
change => {
// observe pushes/splices on a user link DB 'data' field (should only happen for local changes)
switch (change.type as any) {
case 'splice':
(change as any).added.forEach((link: any) => addLinkToDoc(toRealField(link)));
(change as any).removed.forEach((link: any) => remLinkFromDoc(toRealField(link)));
break;
case 'update': //let oldValue = change.oldValue;
}
},
true
);
observe(
userLinkDBDoc,
'data', // obsever when a new array of links is assigned as the link DB 'data' field (should happen whenever a remote user adds/removes a link)
change => {
switch (change.type as any) {
case 'update':
Promise.all([...((change.oldValue as any as Doc[]) || []), ...((change.newValue as any as Doc[]) || [])]).then(doclist => {
const oldDocs = doclist.slice(0, ((change.oldValue as any as Doc[]) || []).length);
const newDocs = doclist.slice(((change.oldValue as any as Doc[]) || []).length, doclist.length);
const added = newDocs?.filter(link => !(oldDocs || []).includes(link));
const removed = oldDocs?.filter(link => !(newDocs || []).includes(link));
added?.forEach((link: any) => addLinkToDoc(toRealField(link)));
removed?.forEach((link: any) => remLinkFromDoc(toRealField(link)));
});
}
},
true
);
}
};
observe(
LinkManager.userLinkDBs,
change => {
switch (change.type as any) {
case 'splice':
(change as any).added.forEach(watchUserLinkDB);
break;
case 'update': //let oldValue = change.oldValue;
}
},
true
);
LinkManager.addLinkDB(Doc.LinkDBDoc());
DocListCastAsync(Doc.LinkDBDoc()?.data).then(dblist =>
dblist?.forEach(async link => {
// make sure anchors are loaded to avoid incremental updates to computedFn's in LinkManager
const a1 = await Cast(link?.anchor1, Doc, null);
const a2 = await Cast(link?.anchor2, Doc, null);
})
);
}
public createLinkrelationshipLists = () => {
//create new lists for link relations and their associated colors if the lists don't already exist
!Doc.UserDoc().linkRelationshipList && (Doc.UserDoc().linkRelationshipList = new List<string>());
!Doc.UserDoc().linkColorList && (Doc.UserDoc().linkColorList = new List<string>());
!Doc.UserDoc().linkRelationshipSizes && (Doc.UserDoc().linkRelationshipSizes = new List<number>());
};
public addLink(linkDoc: Doc, checkExists = false) {
if (!checkExists || !DocListCast(Doc.LinkDBDoc().data).includes(linkDoc)) {
Doc.AddDocToList(Doc.LinkDBDoc(), 'data', linkDoc);
}
}
public deleteLink(linkDoc: Doc) {
return Doc.RemoveDocFromList(Doc.LinkDBDoc(), 'data', linkDoc);
}
public deleteAllLinksOnAnchor(anchor: Doc) {
LinkManager.Instance.relatedLinker(anchor).forEach(linkDoc => LinkManager.Instance.deleteLink(linkDoc));
}
public getAllRelatedLinks(anchor: Doc) {
return this.relatedLinker(anchor);
} // finds all links that contain the given anchor
public getAllDirectLinks(anchor: Doc): Doc[] {
// FIXME:glr Why is Doc undefined?
if (Doc.GetProto(anchor)[DirectLinksSym]) {
return Array.from(Doc.GetProto(anchor)[DirectLinksSym]);
} else {
return [];
}
} // finds all links that contain the given anchor
relatedLinker = computedFn(function relatedLinker(this: any, anchor: Doc): Doc[] {
const lfield = Doc.LayoutFieldKey(anchor);
if (!anchor || anchor instanceof Promise || Doc.GetProto(anchor) instanceof Promise) {
console.log('WAITING FOR DOC/PROTO IN LINKMANAGER');
return [];
}
const dirLinks = Doc.GetProto(anchor)[DirectLinksSym];
const annos = DocListCast(anchor[lfield + '-annotations']);
const timelineAnnos = DocListCast(anchor[lfield + '-annotations-timeline']);
if (!annos || !timelineAnnos) {
debugger;
}
const related = [...annos, ...timelineAnnos].reduce((list, anno) => [...list, ...LinkManager.Instance.relatedLinker(anno)], Array.from(dirLinks).slice());
return related;
}, true);
// returns map of group type to anchor's links in that group type
public getRelatedGroupedLinks(anchor: Doc): Map<string, Array<Doc>> {
const anchorGroups = new Map<string, Array<Doc>>();
this.relatedLinker(anchor).forEach(link => {
if (link.linkRelationship && link.linkRelationship !== '-ungrouped-') {
const relation = StrCast(link.linkRelationship);
const anchorRelation = relation.indexOf(':') !== -1 ? relation.split(':')[Doc.AreProtosEqual(Cast(link.anchor1, Doc, null), anchor) ? 0 : 1] : relation;
const group = anchorGroups.get(anchorRelation);
anchorGroups.set(anchorRelation, group ? [...group, link] : [link]);
} else {
// if link is in no groups then put it in default group
const group = anchorGroups.get('*');
anchorGroups.set('*', group ? [...group, link] : [link]);
}
});
return anchorGroups;
}
// finds the opposite anchor of a given anchor in a link
//TODO This should probably return undefined if there isn't an opposite anchor
//TODO This should also await the return value of the anchor so we don't filter out promises
public static getOppositeAnchor(linkDoc: Doc, anchor: Doc): Doc | undefined {
const a1 = Cast(linkDoc.anchor1, Doc, null);
const a2 = Cast(linkDoc.anchor2, Doc, null);
if (Doc.AreProtosEqual(anchor, a1)) return a2;
if (Doc.AreProtosEqual(anchor, a2)) return a1;
if (Doc.AreProtosEqual(anchor, a1.annotationOn as Doc)) return a2;
if (Doc.AreProtosEqual(anchor, a2.annotationOn as Doc)) return a1;
if (Doc.AreProtosEqual(anchor, linkDoc)) return linkDoc;
}
}
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