feat(informer): ✨ add block info based on player's relative position

Relative position includes simple words like "feet", "standing", "head", etc

lib/plugins/informer.js

@@ -14,6 +14,54 @@ let cfg = {
     bot: bot
 }
 
+var RelativePosEnum
+(function (RelativePosEnum) {
+    RelativePosEnum[RelativePosEnum["feet"] = 0] = "feet"
+    RelativePosEnum[RelativePosEnum["standing"] = 1] = "standing"
+    RelativePosEnum[RelativePosEnum["head"] = 2] = "head"
+    RelativePosEnum[RelativePosEnum["looking"] = 3] = "looking"
+    RelativePosEnum[RelativePosEnum["infront"] = 4] = "infront"
+    RelativePosEnum[RelativePosEnum["behind"] = 5] = "behind"
+})(RelativePosEnum || (RelativePosEnum = {}))
+
+function relPosToBlock(entity, relPos) {
+    let pos
+    if (!(relPos in RelativePosEnum)) return console.warn("info: not a relative position:", relPos)
+    relPos = typeof relPos === "number" ? RelativePosEnum[relPos] : relPos
+    switch (relPos) {
+        case "feet":
+            pos = entity.position;
+            break
+        case "standing":
+            pos = entity.position.offset(0, -1, 0)
+            break
+        // todo use CARDINAL directions api from pathfinder
+        // case "behind":
+        //     entity.yaw
+        //     pos = entity.position
+        //     break
+        // case "front":
+        // case "infront":
+        //     pos = entity.position
+        //     break
+        case "head":
+            pos = entity.position.offset(0, 1.85, 0)
+            break
+        case "looking":
+            if (entity === bot.entity) {
+                return bot.blockAtCursor()
+                // return bot.blockInSight(128, 128)
+            }
+        default:
+            quiet || bot.chat(`info: pos '${relPos}' not implemented`)
+            break
+    }
+    if (pos) {
+        // nearest block
+        return bot.blockAt(pos)
+    }
+}
+
 function isVec3(vec) {
     return vec?.length === 3 || vec.x && vec.y && vec.z
 }
@@ -21,7 +69,7 @@ function isVec3(vec) {
 function block(entity = bot.entity, pos = entity?.position?.offset(0, -1, 0)) {
     console.assert(pos || entity)
     const block = isVec3(pos) ? bot.blockAt(v(pos))
-        : pos
+        : typeof pos === "string" ? relPosToBlock(entity, RelativePosEnum[pos]) : pos
     console.log(block, block?.getProperties && block.getProperties())
     if (!block) {
         quiet || bot.chat("empty block")
@@ -146,8 +194,13 @@ function command(message_parts, player) {
                             block(player)
                             break
                         default:
-                            console.log(bot.players[message_parts[1]])
-                            quiet || bot.chat("info: not yet implemented")
+                            if (message_parts[1] in RelativePosEnum) {
+                                block(undefined, message_parts[1])
+                            } else {
+                                // or entity(message_parts[1]).position
+                                console.log(bot.players[message_parts[1]])
+                                quiet || bot.chat("info: not yet implemented")
+                            }
                     }
                     break
                 case "e":