first working version :3

src/plugins/blockKeywords/index.ts

@@ -0,0 +1,109 @@
+import definePlugin, { OptionType } from "@utils/types";
+import { Settings } from "@api/Settings";
+import { Devs } from "@utils/constants";
+import { MessageJSON } from "discord-types/general";
+
+// o: has ._channelMessages and .commit()
+// o is ChannelMessages
+// o is h class
+// foreach iterates through _messages
+// D is RelationshipStore?
+
+// o.default.forEach(e=>{o.default.commit(e.reset(e.map(e=>e.set('blocked',$self.containsBlockedKeywords($1)))))})
+
+export default definePlugin({
+    name: "BlockKeywords",
+    description: "Blocks messages containing specific user-defined keywords, as if the user sending them was blocked.",
+    authors: [Devs.catcraft],
+    patches: [
+        /*
+        {
+            // alternative find string: "d.getPrivateChannelIntegrationRemovedSystemMessageASTContent)({"
+            find: '.MessageTypes.PRIVATE_CHANNEL_INTEGRATION_ADDED)return(',
+            replacement: {
+                match: /default\.isBlocked\((.{1,2})\.author.id\)/g,
+                replace: "$&||$self.containsBlockedKeywords($1)"
+            }
+        },
+        {
+            find: 'displayName="MessageStore"',
+            replacement: {
+                match: /default\.isBlocked\((.{1,2})\.author.id\)/g,
+                replace: "$&||$self.containsBlockedKeywords($1)"
+            }
+        },
+        {
+            find: 'displayName="ReadStateStore"',
+            replacement: {
+                match: /default\.isBlocked\((.{1,2})\.author.id\)/g,
+                replace: "$&||$self.containsBlockedKeywords($1)"
+            }
+        },
+        {
+            find: 'default.Messages.NEW_MESSAGES_ESTIMATED_SUMMARIES):(',
+            replacement: {
+                match: /default\.isBlocked\((.{1,2})\.author.id\)/g,
+                replace: "$&||$self.containsBlockedKeywords($1)"
+            }
+        },
+        {
+            find: '.default.Messages.BLOCKED_MESSAGE_COUNT:(',
+            replacement: {
+                match: /default\.isBlocked\((.{1,2})\.author.id\)/g,
+                replace: "$&||$self.containsBlockedKeywords($1)"
+            }
+        },
+        {
+            find: '.displayName="ChannelPinsStore"',
+            replacement: {
+                match: /default\.isBlocked\((.{1,2})\.author.id\)/g,
+                replace: "$&||$self.containsBlockedKeywords($1)"
+            }
+        },
+        {
+            // alternative find string: "()},MESSAGE_CREATE:function"
+            // replace arg with arg.set('blocked', $self.containsBlockedKeywords(arg))
+            find: 'LOAD_MESSAGE_INTERACTION_DATA_SUCCESS:function',
+            replacement: {
+                match: /(\)\),.{0,2}\.default\.commit\()(.{0,2})(\)\},MESSAGE_SEND_FAILED:function)/g,
+                replace: "$1$self.blockMessagesWithKeywords($2)$3"
+            }
+        },
+        */
+        {
+            find: '.default("ChannelMessages")',
+            replacement: {
+                match: /static commit\((.{1,2})\){/g,
+                replace: "$&$1=$self.blockMessagesWithKeywords($1);"
+            }
+        },
+    ],
+
+    options: {
+        blockedWords: {
+            type: OptionType.STRING,
+            description: "Comma-seperated list of words to block.",
+            default: ""
+        }
+    },
+
+    containsBlockedKeywords(message: MessageJSON) {
+        if (!Settings.plugins.BlockKeywords.blockedWords) { return false; }
+        const blockedWordsList: Array<string> = Settings.plugins.BlockKeywords.blockedWords.split(",");
+
+        // can't use blockedWordsList.forEach because we need to return from inside the loop
+        for (let wordIndex = 0; wordIndex < blockedWordsList.length; wordIndex++) {
+            if (message.content.includes(blockedWordsList[wordIndex])) {
+                return true;
+            }
+        }
+
+        return false;
+    },
+
+    blockMessagesWithKeywords(messageList: any) {
+        return messageList.reset(messageList.map(
+            message => message.set('blocked', this.containsBlockedKeywords(message))
+        ));
+    }
+});

src/utils/constants.ts

@@ -418,6 +418,10 @@ export const Devs = /* #__PURE__*/ Object.freeze({
     Av32000: {
         name: "Av32000",
         id: 593436735380127770n,
+    },
+    catcraft: {
+        name: "catcraft",
+        id: 290162449213292546n,
     }
 } satisfies Record<string, Dev>);