Fix crash possibility if module: <name> is not defined and on mistake position: <position> (#3445)

Fix #3442

js/check_config.js

@@ -5,6 +5,10 @@ const { Linter } = require("eslint");
 
 const linter = new Linter();
 
+const Ajv = require("ajv");
+
+const ajv = new Ajv();
+
 const rootPath = path.resolve(`${__dirname}/../`);
 const Log = require(`${rootPath}/js/logger.js`);
 
@@ -59,6 +63,68 @@ function checkConfigFile () {
 		for (const error of errors) {
 			Log.error(`Line ${error.line} column ${error.column}: ${error.message}`);
 		}
+		return;
+	}
+
+	Log.info("Checking modules structure configuration... ");
+
+	// Make Ajv schema confguration of modules config
+	// only scan "module" and "position"
+	const schema = {
+		type: "object",
+		properties: {
+			modules: {
+				type: "array",
+				items: {
+					type: "object",
+					properties: {
+						module: {
+							type: "string"
+						},
+						position: {
+							type: "string",
+							enum: [
+								"top_bar",
+								"top_left",
+								"top_center",
+								"top_right",
+								"upper_third",
+								"middle_center",
+								"lower_third",
+								"bottom_left",
+								"bottom_center",
+								"bottom_right",
+								"bottom_bar",
+								"fullscreen_above",
+								"fullscreen_below"
+							]
+						}
+					},
+					required: ["module"]
+				}
+			}
+		}
+	};
+
+	// scan all modules
+	const validate = ajv.compile(schema);
+	const data = require(configFileName);
+
+	const valid = validate(data);
+	if (!valid) {
+		let module = validate.errors[0].instancePath.split("/")[2];
+		let position = validate.errors[0].instancePath.split("/")[3];
+
+		Log.error(colors.red("This module configuration contains errors:"));
+		Log.error(data.modules[module]);
+		if (position) {
+			Log.error(colors.red(`${position}: ${validate.errors[0].message}`));
+			Log.error(validate.errors[0].params.allowedValues);
+		} else {
+			Log.error(colors.red(validate.errors[0].message));
+		}
+	} else {
+		Log.info(colors.green("Your modules structure configuration doesn't contain errors :)"));
 	}
 }