Publish

FilterApp.ts

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+import { IConfigurationExtend, IConfigurationModify, IEnvironmentRead, IHttp, ILogger, IMessageBuilder, IMessageExtender, IPersistence, IRead } from '@rocket.chat/apps-ts-definition/accessors';
+import { App } from '@rocket.chat/apps-ts-definition/App';
+import { IMessage, IMessageAttachment, IPreMessageSentModify } from '@rocket.chat/apps-ts-definition/messages';
+import { IAppInfo } from '@rocket.chat/apps-ts-definition/metadata';
+import { SettingType, ISetting } from '@rocket.chat/apps-ts-definition/settings';
+
+export class FilterApp extends App implements IPreMessageSentModify {
+    private filterList;
+
+    constructor(info: IAppInfo, logger: ILogger) {
+        super(info, logger);
+        this.filterList = [];
+    }
+
+    private parseConfig(text) {
+        let newFilterList = [];
+
+        try {
+            newFilterList = JSON.parse(text);
+            this.filterList = newFilterList;
+
+            return true;
+        } catch (e) {
+            return false;
+        }
+    }
+
+    public async onEnable(environment: IEnvironmentRead, configurationModify: IConfigurationModify): Promise<boolean> {
+        const metaFilterList = await environment.getSettings().getValueById('filterList') as string;
+
+        return this.parseConfig(metaFilterList);
+    }
+
+    public async onSettingUpdated(setting: ISetting, configurationModify: IConfigurationModify, read: IRead, http: IHttp): Promise<void> {
+        if (setting.id !== 'filterList') {
+            return;
+        }
+
+        this.parseConfig(setting.value);
+    }
+
+    public async checkPreMessageSentModify(message: IMessage): Promise<boolean> {
+        return typeof message.text === 'string';
+    }
+
+    public async executePreMessageSentModify(message: IMessage, builder: IMessageBuilder, read: IRead, http: IHttp, persistence: IPersistence): Promise<IMessage> {
+        let text = message.text || '';
+
+        Object.keys(this.filterList).forEach((key) => {
+            const filter = this.filterList[key] || {};
+
+            text = text.replace(new RegExp(filter.regex || '', filter.flags || 'gi'), filter.replacement || '');
+        });
+
+        return builder.setText(text).getMessage();
+    }
+
+    protected async extendConfiguration(configuration: IConfigurationExtend, environmentRead: IEnvironmentRead): Promise<void> {
+        await configuration.settings.provideSetting({
+            id: 'filterList',
+            type: SettingType.STRING,
+            packageValue: '[\n  {\n    "regex": "rocketchat",\n    "flags": "gi",\n    "replacement": "Rocket.Chat"\n  }\n]',
+            required: false,
+            public: false,
+            multiline: true,
+            i18nLabel: 'FilterApp_FilterList',
+            i18nDescription: 'FilterApp_FilterList_Description',
+        });
+    }
+}

README.md

@@ -1,2 +1,6 @@
 # Rocket.Chat.WordFilter
 Replaces all occurences of words in messages with other words.
+
+Simply pop in the App, and tweak the filter list to your liking! It uses regular expressions to allow for further customization.
+
+![Logo](/icon.jpg)

app.json

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+{
+    "id": "28186184-a2eb-4359-9c6f-b20086141085",
+    "name": "Word Filter",
+    "nameSlug": "word-filter",
+    "description": "Replaces all occurences of words in messages with other words.",
+    "version": "0.0.1",
+    "requiredApiVersion": "^0.9.13",
+    "author": {
+        "name": "vynmera",
+        "homepage": "https://github.com/vynmera/Rocket.Chat.WordFilter",
+        "support": "https://github.com/vynmera/Rocket.Chat.WordFilter/issues"
+    },
+    "classFile": "FilterApp.ts",
+    "iconFile": "icon.jpg"
+}

i18n/en.json

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+{
+    "FilterApp_FilterList": "Filter List",
+    "FilterApp_FilterList_Description": "This should be an array of objects with keys `regex` containing a regex (without slashes), `flags` containing regex flags, and `replacement` containing the new content."
+}

package.json

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+{
+    "devDependencies": {
+        "@rocket.chat/apps-ts-definition": "^0.9.13",
+        "typescript": "^2.9.1"
+    }
+}

tsconfig.json

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+{
+    "compilerOptions": {
+      "target": "es2017",
+      "module": "commonjs",
+      "moduleResolution": "node",
+      "declaration": false,
+      "noImplicitAny": false,
+      "removeComments": true,
+      "strictNullChecks": true,
+      "noImplicitReturns": true,
+      "emitDecoratorMetadata": true,
+      "experimentalDecorators": true,
+    },
+    "include": [
+      "**/*.ts"
+    ]
+  }
+