model.js

class Model {
	constructor() {
		this.activeRules = [
			Rules.listMods,
			Rules.checkSJCrash,
			Rules.checkFMODCrash,
			Rules.checkOutOfMemoryException,
			Rules.checkSteam
		];
	}

	resetState() {
		this.issues = [];
		this.logLines = [];
		this.modsVersions = {};
		this.componentsOutOfDate = false;
	}

	readLog(logText) {
		this.resetState();
		var criticalErrorFound = false;
		const lines = logText.split('\n');

		for (const text of lines) {
			var loglevel = -1;
			var criticalError = false;

			for (const level in LOG_LEVELS) {
				if (text.includes("[" + level + "]")) {
					loglevel = LOG_LEVELS[level];
					break;
				}
			}

			if (text.includes(CRITICAL_ERROR_MARK)) {
				criticalError = true;
			}

			for (const rule of this.activeRules) {
				rule.bind(this)(text); // bind rule so it can access instance of model
			}

			this.logLines.push({text, loglevel, criticalError});
		}

		this.onLogLoaded(this.logLines);
		this.onModsChanged(this.modsVersions);
	}

	addIssue(issue) {
		this.issues.push(issue);
		this.onIssueAdded(issue);
	}

	addLoadedMod(mod, loadedVersion) {
		this.modsVersions[mod] = {loadedVersion};
	}

	async fetchModsLatestVersions() {
		var outOfDateVersionsFound = false;

		const yamlLines = await fetch(MADDIE_MODS_VERSIONS_URL)
			.then((response) => response.text())
			.then((text) => text.split(('\n')));

		// very crude YAML parsing
		for (const line of yamlLines) {
			if (!line.startsWith("  ")) {
				var mod = cleanQuotes(line.slice(0, -1)); // remove trailing `:`
			} else if (line.startsWith("  Version: ")) {
				if (mod in this.modsVersions) {
					const latestVersion = cleanQuotes(line.slice("  Version: ".length));
					this.modsVersions[mod]['latestVersion'] = latestVersion;
					if (!outOfDateVersionsFound && this.modsVersions[mod]['latestVersion'] != this.modsVersions[mod]['loadedVersion']) {
						outOfDateVersionsFound = true;
						this.addIssue("Some mods are out of date! Update your mods.");
						this.componentsOutOfDate = true;
					}
				}
			}
		}
	}

	async fetchStableEverestVersion() {
		const json = await fetch(GITHUB_EVEREST_VERSION_URL)
			.then((response) => response.json());

		const stableEverestVersion = removePrefix(json[0]['tag_name'], 'stable-');
		this.modsVersions['Everest']['latestVersion'] = stableEverestVersion;

		if (stableEverestVersion != this.modsVersions['Everest']['loadedVersion']) {
			this.addIssue("Everest is out of date! Update Everest."); // assume stable version
			this.componentsOutOfDate = true;
		}
	}

	async checkForUpdates() {
		await this.fetchModsLatestVersions();
		await this.fetchStableEverestVersion();
		this.onModsChanged(this.modsVersions);
		this.onVersionsChecked(this.componentsOutOfDate);
	}
}