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/db.js

@@ -63,6 +63,39 @@ export default class Database {
         }
     }
 
+    deleteNode(prefix, id) {
+        try {
+            let model = nodeModels[prefix]
+            if(model) {
+                this.nodes[model.indices[0] + (id - 1)] = 0
+            } else {
+                throw new Error("Type does not exist for node: " + id)
+            }
+        } catch(e) {
+            throw e
+        }
+    }
+
+    editNode(prefix, id, toEdit) {
+        try {
+            let model = nodeModels[prefix]
+            if(model) {
+                let schema = model.schema
+                let result = schema.safeParse(toEdit)
+                if(result.success) {
+                    this.nodes[model.indices[0] + (id - 1)] = toEdit
+                } else {
+                    console.error(result.error)
+                    throw new global.ServerError(400, "Invalid Data!");
+                }
+            } else {
+                throw new Error("Type does not exist for node: " + prefix)
+            }
+        } catch(e) {
+            throw e
+        }
+    }
+
     addEdge(prefix, edge) {
         try {
             let type = prefix
@@ -83,7 +116,22 @@ export default class Database {
                     throw new global.ServerError(400, "Invalid Data!");
                 }
             } else {
-                throw new Error("Type does not exist for edge: " + id)
+                throw new Error("Type does not exist for edge: " + prefix)
+            }
+        } catch(e) {
+            throw e
+        }
+    }
+
+    deleteEdge(prefix, id) {
+        try {
+            let model = edgeModels[prefix]
+            if(model) {
+                console.log(model.indices[0] + (id - 1))
+                this.edges[model.indices[0] + (id - 1)] = 0
+                console.log(this.edges[model.indices[0] + (id - 1)])
+            } else {
+                throw new Error("Type does not exist for edge: " + prefix)
             }
         } catch(e) {
             throw e

server/db/model/edge.js

@@ -1,13 +1,21 @@
 export default class Edge {
-    add(n) {
+    splitEdge(n) {
         let toPrefix = n.to.split("-")[0]
         let fromPrefix = n.from.split("-")[0]
         let type = n.type
-        let prefix = `${fromPrefix}_${type}_${toPrefix}`
+        return `${fromPrefix}_${type}_${toPrefix}`
+    }
 
+    add(n) {
+        let prefix = this.splitEdge(n)
         global.db.addEdge(prefix, n)
     }
 
+    delete(n) {
+        let prefix = this.splitEdge(n)
+        global.db.deleteEdge(prefix, n.from.split("-")[1])
+    }
+
     getByFrom(fromID) {
         let result = []
         for(let i = 0; i < this.entries.length; i++) {

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
+    }
+}

server/db/model/edges/POST_FROM_NETWORK.js

@@ -0,0 +1,29 @@
+import { z } from 'zod'
+
+export default class POST_FROM_NETWORK {
+    prefix = "POST_FROM_NETWORK"
+    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()
+    
+    getByNetwork(id) {
+      let result = []
+        for(let i = this.indices[0]; i < this.indices[1]; i++) {
+            if(global.db.edges[i].to === `${global.db.networks.prefix}-${id}`) {
+                result.push(global.db.edges[i])
+            }
+        }
+        return result
+    }
+}

server/db/model/forum/post.js

@@ -1,6 +1,7 @@
 import { z } from 'zod';
 
 export default class Post  {
+    prefix = "POST"
     indices = null
 
     constructor(indices) {
@@ -8,13 +9,16 @@ export default class Post  {
     }
     
     schema = z.object({
+        id: z.number(),
         text: z.string(),
         time: z.string(),
-        sentBy: z.string()
+        sentBy: z.string(),
+        edited: z.boolean()
     })
 
     makeID(forum, number) {
-        return `POST-${forum}-${number}`
+        // return `POST-${forum}-${number}`
+        return `POST-${number}`
     }
 
     save(post, id) {
@@ -32,30 +36,130 @@ export default class Post  {
         }
     }
 
-    get(forum, number) {
+    get(forum, by, authorId = null) {
         let result = []
-        let limit = Math.min(number, this.entries.length)
-        for(let i=1; i<=limit; i++) {
-            let id = this.makeID(forum, i)
-            let post = this.entries[this.ids[id]]
-            let {firstName, lastName} = global.db.members.get(post.sentBy)
-            let seededObj = {
-                ...post
-            }
-            seededObj.sentByID = post.sentBy
-            seededObj.sentBy = firstName + " " + lastName
-            result.push(seededObj)
+        if (by === "member" && authorId) {
+            result = this.getByMember(authorId)
+        } else { // network
+            let { id: networkId } = global.db.networks.getByAbbreviation(forum)
+            result = this.getByNetwork(networkId)
         }
         return result
     }
 
+    getByID(id) {
+        if(typeof id === 'string') {
+            id = id.split("-")[1]
+        }
+        return {
+            id,
+            authorId: this.getAuthor(id),
+            ...global.db.nodes[this.indices[0] + (id - 1)]
+        }
+    }
+
+    getAuthor(postId) {
+        return db.POST_BY_MEMBER.getAuthorId(`${this.prefix}-${postId}`);
+    }
+
+    getByNetwork(id) {
+        let connections = db.POST_FROM_NETWORK.getByNetwork(id)
+        let posts = []
+        connections.forEach((conn) => {
+            posts.push(this.getByID(conn.from))
+        })
+        return posts
+    }
+
+    getByMember(stringID) {
+        let connections = db.POST_BY_MEMBER.getByMember(stringID)
+        let posts = []
+        connections.forEach((conn) => {
+            posts.push(this.getByID(conn.from))
+        })
+        return posts
+    }
+
+    async edit(id, text, userEmail) {
+        try {
+            let userId = global.db.members.getByEmail(userEmail).id
+            let postToEdit = this.getByID(id)
+
+            if (postToEdit.authorId !== userId) {
+                throw new global.ServerError(401, "Not authorized to delete post!")
+            }
+
+            postToEdit.text = text
+            postToEdit.time = global.currentTime()
+            postToEdit.edited = true;
+            
+            let { authorId, ...rest } = postToEdit
+            global.db.editNode(this.prefix, id, rest)
+
+            return postToEdit
+        } catch(e) {
+            console.error(e)
+            throw new global.ServerError(400, "Failed to delete post!")
+        }
+    }
+
+    async delete(id, forum, userEmail) {
+        try {
+            let userId = global.db.members.getByEmail(userEmail).id 
+            let network = global.db.networks.getByAbbreviation(forum)
+
+            if (this.getAuthor(id) !== userId) {
+                throw new global.ServerError(401, "Not authorized to delete post!")
+            }
+
+            global.db.deleteNode(this.prefix, id)
+            
+            if(network) {
+                global.db.edge.delete({
+                    type: "FROM",
+                    from: `${this.prefix}-${id}`,
+                    to: `NETWORK-${network.id}`
+                })
+            }
+            global.db.edge.delete({
+                type: "BY",
+                from: `${this.prefix}-${id}`,
+                to: `MEMBER-${userId}`
+            })
+        } catch(e) {
+            console.error(e)
+            throw new global.ServerError(400, "Failed to delete post!")
+        }
+    }
+
     async add(text, forum, userEmail) {
         let newPost = {}
-        newPost.text = text
-        newPost.sentBy = db.members.getIDFromEmail(userEmail)
-        newPost.time = global.currentTime()
+        let sender = global.db.members.getByEmail(userEmail)
+        let network = global.db.networks.getByAbbreviation(forum)
 
-        let idNumber = this.entries.length+1
-        super.add(this.makeID(forum, idNumber), newPost)
+        newPost.text = text
+        newPost.time = global.currentTime()
+    
+        try {
+            newPost.sentBy = `${sender.firstName} ${sender.lastName}`
+
+            global.db.addNode(this.prefix, newPost)
+            if(network) {
+                global.db.edge.add({
+                    type: "FROM",
+                    from: `${this.prefix}-${global.db.getCurrentIndex(this)}`,
+                    to: `NETWORK-${network.id}`
+                })
+            }
+            global.db.edge.add({
+                type: "BY",
+                from: `${this.prefix}-${global.db.getCurrentIndex(this)}`,
+                to: `MEMBER-${sender.id}`
+                })
+            return `${this.prefix}-${global.db.getCurrentIndex(this)}`
+        } catch(e) {
+            console.error(e)
+            throw new global.ServerError(400, "Failed to add member!");
+        }
     }
 }

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)
 }

server/db/model/network.js

@@ -24,6 +24,15 @@ export default class Network  {
         return global.db.nodes[index]
     }
 
+    getByAbbreviation(abbreviation) {
+        for(let i=this.indices[0]; i<this.indices[1]; i++) {
+            if(global.db.nodes[i].abbreviation === abbreviation) {
+                return global.db.nodes[i]
+            }
+        }
+        return null
+    }
+
     save(n) {
         let id = `${this.prefix}-${n.id}`
         let result = this.schema.safeParse(n)

server/db/schemas.js

@@ -47,9 +47,11 @@ export let PAYMENT = z.object({
 })
 
 export let POST = z.object({
+    id: z.number(),
     text: z.string(),
     time: z.string(),
-    sentBy: z.string()
+    sentBy: z.string(),
+    edited: z.boolean()
 })
 
 export let CONVSRSATION =  z.object({

server/ws/handlers/ForumHandler.js

@@ -8,35 +8,99 @@ const sendSchema = z.object({
 
 const getSchema = z.object({
     forum: z.string(),
-    number: z.number()
+    by: z.string(),
+    authorId: z.number()
 })
 .strict()
 
+const deleteSchema = z.object({
+    forum: z.string(),
+    id: z.number()
+})
+.strict()
+
+const putSchema = z.object({
+    forum: z.string(),
+    id: z.number(),
+    text: z.string()
+})
+.strict()
 
 export default class ForumHandler {
-    static handleSend(msg, ws) {
+    static async handleSend(msg, ws) {
         try {
-            global.db.posts.add(msg.text, msg.forum, ws.userEmail)
-            global.Socket.broadcast({event: "new-post", app: "FORUM", forum: msg.forum, msg: this.handleGet({forum: msg.forum, number: 100})})
-            return {success: true}
+            let postId = await global.db.posts.add(msg.text, msg.forum, ws.userEmail)
+            let newPost = global.db.posts.getByID(postId)
+            if (newPost) {
+                global.Socket.broadcast({
+                    event: "new-post", 
+                    app: "FORUM", 
+                    forum: msg.forum, 
+                    msg: newPost
+               })
+               return {success: true}
+            } else {
+                return {success: false}
+            }
         } catch(e) {
             console.error(e)
         }
     }
 
     static handleGet(msg) {
-        let data = global.db.posts.get(msg.forum, msg.number)
+        let data = global.db.posts.get(msg.forum, msg.by, msg.authorId)
         return data
     }
 
-    static handle(operation, msg, ws) {
+    static async handleDelete(msg, ws) {
+        try {
+            await global.db.posts.delete(msg.id, msg.forum, ws.userEmail)
+            global.Socket.broadcast({
+                event: "deleted-post", 
+                app: "FORUM", 
+                forum: msg.forum, 
+                msg: msg.id
+            })
+            return {success: true}
+        } catch(e) {
+            console.error(e)
+            return {success: false}
+        }
+    }
+
+    static async handlePut(msg, ws) {
+        try {
+            let editedPost = await global.db.posts.edit(msg.id, msg.text, ws.userEmail)
+            console.log(editedPost)
+            if (editedPost) {
+                global.Socket.broadcast({
+                    event: "edited-post", 
+                    app: "FORUM", 
+                    forum: msg.forum, 
+                    msg: editedPost
+                })
+            }
+            return {success: true}
+        } catch(e) {
+            console.error(e)
+            return {success: false}
+        }
+    }
+
+    static async handle(operation, msg, ws) {
         switch(operation) {
             case "SEND":
                 if(!sendSchema.safeParse(msg).success) throw new Error("Incorrectly formatted Forum ws message!")
-                return this.handleSend(msg, ws)
+                return await this.handleSend(msg, ws)
             case "GET":
                 if(!getSchema.safeParse(msg).success) throw new Error("Incorrectly formatted Forum ws message!")
                 return this.handleGet(msg)
+            case "DELETE":
+                if(!deleteSchema.safeParse(msg).success) throw new Error("Incorrectly formatted Forum ws message!")
+                return this.handleDelete(msg, ws)
+            case "PUT":
+                if (!putSchema.safeParse(msg).success) throw new Error("Incorrectly formatted ws message!")
+                return this.handlePut(msg, ws)
         }
 
     }

server/ws/ws.js

@@ -63,7 +63,7 @@ export default class Socket {
 
     // Build a system where the ws obj is updated every time on navigate, so it already has context
     // this way, we can only send broadcast messages to clients that actually have that app / subapp open
-    handleMessage = (msg, ws) => {
+    handleMessage = async (msg, ws) => {
         try {
             const text = msg.toString();
             const req = JSON.parse(text);
@@ -72,7 +72,7 @@ export default class Socket {
             let responseData;
             switch (req.app) {
                 case "FORUM":
-                    responseData = ForumHandler.handle(req.operation, req.msg, ws)
+                    responseData = await ForumHandler.handle(req.operation, req.msg, ws)
                     break;
 
                 case "MESSAGES":