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import { action, observable, observe, runInAction } from 'mobx';
import { computedFn } from 'mobx-utils';
import { Doc, DocListCast, DocListCastAsync, Field, Opt } from '../../fields/Doc';
import { DirectLinks } from '../../fields/DocSymbols';
import { FieldLoader } from '../../fields/FieldLoader';
import { List } from '../../fields/List';
import { ProxyField } from '../../fields/Proxy';
import { Cast, DocCast, PromiseValue, StrCast } from '../../fields/Types';
import { DocServer } from '../DocServer';
import { ScriptingGlobals } from './ScriptingGlobals';
/*
* link doc:
* - link_anchor_1: doc
* - link_anchor_2: 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 Links(doc: Doc | undefined) {
return doc ? LinkManager.Instance.getAllRelatedLinks(doc) : [];
}
public static addLinkDB = async (linkDb: any) => {
await Promise.all(
((await DocListCastAsync(linkDb.data)) ?? []).map(link =>
// makes sure link anchors are loaded to avoid incremental updates to computedFns in LinkManager
[PromiseValue(link?.link_anchor_1), PromiseValue(link?.link_anchor_2)]
)
);
LinkManager.userLinkDBs.push(linkDb);
};
public static AutoKeywords = 'keywords:Usages';
static _links: Doc[] = [];
constructor() {
LinkManager._instance = this;
this.createlink_relationshipLists();
LinkManager.userLinkDBs = [];
// since this is an action, not a reaction, we get only one shot to add this link to the Anchor docs
// Thus make sure all promised values are resolved from link -> link.proto -> link.link_anchor_[1,2] -> link.link_anchor_[1,2].proto
// Then add the link to the anchor protos.
const addLinkToDoc = (lprom: Doc) =>
PromiseValue(lprom).then((link: Opt<Doc>) =>
PromiseValue(link?.proto as Doc).then((lproto: Opt<Doc>) =>
Promise.all([lproto?.link_anchor_1 as Doc, lproto?.link_anchor_2 as Doc].map(PromiseValue)).then((lAnchs: Opt<Doc>[]) =>
Promise.all(lAnchs.map(lAnch => PromiseValue(lAnch?.proto as Doc))).then((lAnchProtos: Opt<Doc>[]) =>
Promise.all(lAnchProtos.map(lAnchProto => PromiseValue(lAnchProto?.proto as Doc))).then(
link &&
action(lAnchProtoProtos => {
Doc.AddDocToList(Doc.UserDoc(), 'links', link);
lAnchs[0] && Doc.GetProto(lAnchs[0])[DirectLinks].add(link);
lAnchs[1] && Doc.GetProto(lAnchs[1])[DirectLinks].add(link);
})
)
)
)
)
);
const remLinkFromDoc = (lprom: Doc) =>
PromiseValue(lprom).then((link: Opt<Doc>) =>
PromiseValue(link?.proto as Doc).then((lproto: Opt<Doc>) =>
Promise.all([lproto?.link_anchor_1 as Doc, lproto?.link_anchor_2 as Doc].map(PromiseValue)).then((lAnchs: Opt<Doc>[]) =>
Promise.all(lAnchs.map(lAnch => PromiseValue(lAnch?.proto as Doc))).then((lAnchProtos: Opt<Doc>[]) =>
Promise.all(lAnchProtos.map(lAnchProto => PromiseValue(lAnchProto?.proto as Doc))).then(
action(lAnchProtoProtos => {
link && lAnchs[0] && Doc.GetProto(lAnchs[0])[DirectLinks].delete(link);
link && lAnchs[1] && Doc.GetProto(lAnchs[1])[DirectLinks].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
);
runInAction(() => (FieldLoader.ServerLoadStatus.message = 'links'));
LinkManager.addLinkDB(Doc.LinkDBDoc());
}
public createlink_relationshipLists = () => {
//create new lists for link relations and their associated colors if the lists don't already exist
!Doc.UserDoc().link_relationshipList && (Doc.UserDoc().link_relationshipList = new List<string>());
!Doc.UserDoc().link_ColorList && (Doc.UserDoc().link_ColorList = new List<string>());
!Doc.UserDoc().link_relationshipSizes && (Doc.UserDoc().link_relationshipSizes = new List<number>());
};
public addLink(linkDoc: Doc, checkExists = false) {
Doc.AddDocToList(Doc.UserDoc(), 'links', linkDoc);
if (!checkExists || !DocListCast(Doc.LinkDBDoc().data).includes(linkDoc)) {
Doc.AddDocToList(Doc.LinkDBDoc(), 'data', linkDoc);
setTimeout(DocServer.UPDATE_SERVER_CACHE, 100);
}
}
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[] {
return Array.from(Doc.GetProto(anchor)[DirectLinks]);
} // finds all links that contain the given anchor
relatedLinker = computedFn(function relatedLinker(this: any, anchor: Doc): Doc[] {
if (!anchor || anchor instanceof Promise || Doc.GetProto(anchor) instanceof Promise) {
console.log('WAITING FOR DOC/PROTO IN LINKMANAGER');
return [];
}
const dirLinks = Doc.GetProto(anchor)[DirectLinks];
const annos = DocListCast(anchor[Doc.LayoutFieldKey(anchor) + '_annotations']);
if (!annos) debugger;
return annos.reduce((list, anno) => [...list, ...LinkManager.Instance.relatedLinker(anno)], Array.from(dirLinks).slice());
}, 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.link_relationship && link.link_relationship !== '-ungrouped-') {
const relation = StrCast(link.link_relationship);
const anchorRelation = relation.indexOf(':') !== -1 ? relation.split(':')[Doc.AreProtosEqual(Cast(link.link_anchor_1, 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.link_anchor_1, Doc, null);
const a2 = Cast(linkDoc.link_anchor_2, Doc, null);
if (Doc.AreProtosEqual(DocCast(anchor.annotationOn, anchor), DocCast(a1.annotationOn, a1))) return a2;
if (Doc.AreProtosEqual(DocCast(anchor.annotationOn, anchor), DocCast(a2.annotationOn, a2))) return a1;
if (Doc.AreProtosEqual(anchor, linkDoc)) return linkDoc;
}
}
ScriptingGlobals.add(
function links(doc: any) {
return new List(LinkManager.Links(doc));
},
'returns all the links to the document or its annotations',
'(doc: any)'
);
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