feat(backend): real-time messaging via Socket.IO with persistent storage

apps/backend/drizzle/0001_messaging.sql

@@ -0,0 +1,27 @@
+CREATE TYPE "public"."conversation_type" AS ENUM('dm', 'group');--> statement-breakpoint
+CREATE TABLE "conversation_members" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"conversation_id" uuid NOT NULL,
+	"user_id" uuid NOT NULL,
+	"joined_at" timestamp DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE "conversations" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"type" "conversation_type" DEFAULT 'dm' NOT NULL,
+	"name" text,
+	"created_at" timestamp DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE "messages" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"conversation_id" uuid NOT NULL,
+	"sender_id" uuid NOT NULL,
+	"content" text NOT NULL,
+	"created_at" timestamp DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+ALTER TABLE "conversation_members" ADD CONSTRAINT "conversation_members_conversation_id_conversations_id_fk" FOREIGN KEY ("conversation_id") REFERENCES "public"."conversations"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "conversation_members" ADD CONSTRAINT "conversation_members_user_id_users_id_fk" FOREIGN KEY ("user_id") REFERENCES "public"."users"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "messages" ADD CONSTRAINT "messages_conversation_id_conversations_id_fk" FOREIGN KEY ("conversation_id") REFERENCES "public"."conversations"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "messages" ADD CONSTRAINT "messages_sender_id_users_id_fk" FOREIGN KEY ("sender_id") REFERENCES "public"."users"("id") ON DELETE cascade ON UPDATE no action;

apps/backend/drizzle/meta/0001_snapshot.json

@@ -0,0 +1,329 @@
+{
+  "id": "f0633220-541a-4c99-9b99-8242c7f3420f",
+  "prevId": "ccda4e45-b486-4477-892a-b4ff308b3326",
+  "version": "7",
+  "dialect": "postgresql",
+  "tables": {
+    "public.conversation_members": {
+      "name": "conversation_members",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "conversation_id": {
+          "name": "conversation_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "joined_at": {
+          "name": "joined_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "conversation_members_conversation_id_conversations_id_fk": {
+          "name": "conversation_members_conversation_id_conversations_id_fk",
+          "tableFrom": "conversation_members",
+          "tableTo": "conversations",
+          "columnsFrom": [
+            "conversation_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        },
+        "conversation_members_user_id_users_id_fk": {
+          "name": "conversation_members_user_id_users_id_fk",
+          "tableFrom": "conversation_members",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.conversations": {
+      "name": "conversations",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "type": {
+          "name": "type",
+          "type": "conversation_type",
+          "typeSchema": "public",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'dm'"
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.messages": {
+      "name": "messages",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "conversation_id": {
+          "name": "conversation_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "sender_id": {
+          "name": "sender_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "content": {
+          "name": "content",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "messages_conversation_id_conversations_id_fk": {
+          "name": "messages_conversation_id_conversations_id_fk",
+          "tableFrom": "messages",
+          "tableTo": "conversations",
+          "columnsFrom": [
+            "conversation_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        },
+        "messages_sender_id_users_id_fk": {
+          "name": "messages_sender_id_users_id_fk",
+          "tableFrom": "messages",
+          "tableTo": "users",
+          "columnsFrom": [
+            "sender_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.users": {
+      "name": "users",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "username": {
+          "name": "username",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "avatar_url": {
+          "name": "avatar_url",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "users_username_unique": {
+          "name": "users_username_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "username"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.wallets": {
+      "name": "wallets",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "address": {
+          "name": "address",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "is_primary": {
+          "name": "is_primary",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "wallets_user_id_users_id_fk": {
+          "name": "wallets_user_id_users_id_fk",
+          "tableFrom": "wallets",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "wallets_address_unique": {
+          "name": "wallets_address_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "address"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    }
+  },
+  "enums": {
+    "public.conversation_type": {
+      "name": "conversation_type",
+      "schema": "public",
+      "values": [
+        "dm",
+        "group"
+      ]
+    }
+  },
+  "schemas": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "views": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}

apps/backend/drizzle/meta/_journal.json

@@ -8,6 +8,13 @@
       "when": 1778589700461,
       "tag": "0000_init",
       "breakpoints": true
+    },
+    {
+      "idx": 1,
+      "version": "7",
+      "when": 1778597011664,
+      "tag": "0001_messaging",
+      "breakpoints": true
     }
   ]
 }