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/edges/POST_BY_MEMBER.js

@@ -0,0 +1,37 @@
+import { z } from 'zod'
+
+export default class POST_BY_MEMBER {
+    prefix = "POST_BY_MEMBER"
+    indices = null
+
+    constructor(indices) {
+        this.indices = indices
+    }
+
+    schema = z.object({
+        id: z.number(),
+        type: z.string(),
+        from: z.string(),
+        to: z.string(),
+        created: z.string()
+    })
+    .strict()
+
+    getAuthorId(postId) {
+        for (let i = this.indices[0]; i < this.indices[1]; i++) {
+            if (global.db.edges[i].from === postId) {
+                return Number(global.db.edges[i].to.split("-")[1]);
+            }
+        }
+    }
+
+    getByMember(stringID) {
+        let result = []
+        for(let i = this.indices[0]; i < this.indices[1]; i++) {
+            if(global.db.edges[i].from === stringID) {
+                result.push(global.db.edges[i])
+            }
+        }
+        return result
+    }
+}