https://primlagic.ir/en/blog/Practical notes on building school software, SMS, security and games, from real PrimLagic projects.en https://primlagic.ir/en/blog/student-absence-sms-guide/https://primlagic.ir/en/blog/student-absence-sms-guide/Sat, 24 Oct 2026 00:00:00 GMTHow to record absences at school and notify parents by SMS without headaches: the steps, a message template and the mistakes that happen in practice, with examples from ClassBan. https://primlagic.ir/en/blog/sms-gateway-vs-sms-ir/https://primlagic.ir/en/blog/sms-gateway-vs-sms-ir/Fri, 23 Oct 2026 00:00:00 GMTA practical comparison of two ways to send school SMS, an online provider such as SMS.ir and a gateway on a phone, and how ClassBan combines both with a queue and retries. https://primlagic.ir/en/blog/school-data-backup/https://primlagic.ir/en/blog/school-data-backup/Thu, 22 Oct 2026 00:00:00 GMTWhat a school should back up, how often and where, with the SQLite backup in ClassBan as an example, plus the step most people forget: testing a restore. https://primlagic.ir/en/blog/school-software-security/https://primlagic.ir/en/blog/school-software-security/Wed, 21 Oct 2026 00:00:00 GMTSoftware that stores student data must be secure. A list of real mistakes found while reviewing ClassBan before publishing a demo, and the right fix for each. https://primlagic.ir/en/blog/windows-app-nodejs-prisma-sqlite/https://primlagic.ir/en/blog/windows-app-nodejs-prisma-sqlite/Tue, 20 Oct 2026 00:00:00 GMTClassBan is a Windows program built with Node.js, Express, Prisma and SQLite and packaged into an exe with pkg. The choices, the problems and the fixes. https://primlagic.ir/en/blog/tektactok-solver-q-learning/https://primlagic.ir/en/blog/tektactok-solver-q-learning/Mon, 19 Oct 2026 00:00:00 GMTTekTacTok is a tic-tac-toe variant where each player has only three pieces. Why an exact solver and a reinforcement-learning model are used together, and why this AI is not an LLM. https://primlagic.ir/en/blog/python-to-js-parity-test/https://primlagic.ir/en/blog/python-to-js-parity-test/Sun, 18 Oct 2026 00:00:00 GMTThe TekTacTok online demo needed the game logic moved from Python to JavaScript so it runs in the browser with no server. How we checked the port: comparing 200 games against the original. https://primlagic.ir/en/blog/demo-without-backend-axios-mock/https://primlagic.ir/en/blog/demo-without-backend-axios-mock/Sat, 17 Oct 2026 00:00:00 GMTThe ClassBan online demo needed no database or server. By mocking the whole API in the browser, the real UI runs with fake data. The method, the benefits and the limits. https://primlagic.ir/en/blog/how-web-recon-scanner-works/https://primlagic.ir/en/blog/how-web-recon-scanner-works/Fri, 16 Oct 2026 00:00:00 GMTReconnaissance is the first step of testing a website. What the modules of a scanner like ReconRadar do, from DNS to nmap, and why it should only be used on systems you are authorized to test. https://primlagic.ir/en/blog/browser-only-tools-pdf-excel-images/https://primlagic.ir/en/blog/browser-only-tools-pdf-excel-images/Thu, 15 Oct 2026 00:00:00 GMTJadvalsaz and ImgShrink do all processing in the browser and upload nothing. How they work, why that is good for privacy, and what the limits are.