Add bi/trifurcation and deletion support with @bearbin

src/intelligence-exfiltrator.js

 import { computeErasureIntervals, combineErasureIntervals } from "./erasure.js"
-import { connect } from "./room.js"
 import XMPP from "./connection/XMPP2.js"
+import { connect } from "./room.js"
 
 const DEFAULT_ROOM = "imperial"
 
 let room = null
 let secureLine = null
 let divulgedUpTo = new Map();
+const pointPresenceMap = new Map()
 
 function eraseEverythingAtPosition(x, y, radius, room) {
   const mousePos = [x, y]
@@ -85,14 +86,49 @@ const onRoomConnect = (room_) => {
   room.addEventListener(
     "removedIntervalsChange",
     ({ detail: { id, intervals, points } }) => {
-      room.erasureIntervals[id] = combineErasureIntervals(
+      const currentIntervals = combineErasureIntervals(
         room.erasureIntervals[id] || {},
         intervals,
       )
+
+      room.erasureIntervals[id] = currentIntervals;
+
+      if (pointPresenceMap.get(id) === undefined) {
+        pointPresenceMap.set(id, Array(points.length).fill(true))
+      }
+
+      for (const point in currentIntervals) {
+        deletePoint(id, parseInt(point))
+      }
     },
   )
 }
 
+const deletePoint = (lineID, offset) => {
+  const bLine = pointPresenceMap.get(lineID)
+  if (!bLine[offset]) {
+    return
+  }
+
+  if (offset > 0 && bLine[offset - 1] && offset < (bLine.length - 1) && bLine[offset + 1]) {
+    secureLine.sneakilySendTheOtherTeamOur(JSON.stringify({
+      "type": "BIFURCATE",
+      "identifier": lineID,
+      "start_offset": offset,
+      "end_offset": offset
+    }))
+  }
+
+  secureLine.sneakilySendTheOtherTeamOur(JSON.stringify({
+    "type": "DELETE",
+    "identifier": lineID,
+    "offset": offset
+  }))
+
+  bLine[offset] = false
+}
+
+
 const tryRoomConnect = async (roomID) => {
   return await connect(roomID)
     .then(onRoomConnect)