CRUD operations for Posts

- added all CRUD operations for Post model
- add() also creates POST_BY_MEMBER and POST_FROM_NETWORK edges
- delete() also deletes associated edges
- delete() currently does not reallocate node/edge indices after deleting
- will write the data to the db.json file and global.db.nodes

server/db/model/import.js

@@ -6,6 +6,8 @@ import Post from "./forum/post.js"
 import Conversation from "./dms/conversation.js"
 import DM from "./dms/dm.js"
 import MEMBER_IN_NETWORK from "./edges/MEMBER_IN_NETWORK.js"
+import POST_FROM_NETWORK from "./edges/POST_FROM_NETWORK.js"
+import POST_BY_MEMBER from "./edges/POST_BY_MEMBER.js"
 
 let nIndices = {
     "MEMBER" :          [0, 0], // [id, startIndex, nextEmptyIndex
@@ -18,7 +20,9 @@ let nIndices = {
 }
 
 let eIndices = {
-    "MEMBER_IN_NETWORK": [0, 0]
+    "MEMBER_IN_NETWORK": [0, 0],
+    "POST_FROM_NETWORK": [4000, 4000],
+    "POST_BY_MEMBER": [7000, 7000]
 }
 
 export let nodeModels = { 
@@ -32,5 +36,7 @@ export let nodeModels = {
 }
 
 export let edgeModels = {
-    MEMBER_IN_NETWORK: new MEMBER_IN_NETWORK(eIndices.MEMBER_IN_NETWORK)
+    MEMBER_IN_NETWORK: new MEMBER_IN_NETWORK(eIndices.MEMBER_IN_NETWORK),
+    POST_FROM_NETWORK: new POST_FROM_NETWORK(eIndices.POST_FROM_NETWORK),
+    POST_BY_MEMBER: new POST_BY_MEMBER(eIndices.POST_BY_MEMBER)
 }