Build a Telegram bot with clickable multi-level menus

flowchart TD trig>"customer taps menu button"]:::trig s0[("look up menu structure")]:::store s1["display menu of buttons"]:::task s2["route selection to handler"]:::task s3["return next menu or result"]:::task trig --> s0 s0 --> s1 s1 --> s2 gx{"× which handler was selected"}:::gate s2 --> gx p00["process rating"]:::task gx -->|"ratings handler"| p00 p10["update setting"]:::task gx -->|"settings handler"| p10 jn{"○ return result"}:::gate p00 --> jn p10 --> jn jn --> s3 lp{"customer exits or reaches final action"}:::gate s3 --> lp lp -. "customer selects another option" .-> s1 lp -->|"finished"| out out[/"clickable menu navigation delivered"/]:::out pay{{"app-like experience inside chat"}}:::pay out --> pay classDef task fill:#e7f6fe,stroke:#34b8f0,color:#2c2a29 classDef svc fill:#f6f8fa,stroke:#7c8795,color:#2c2a29 classDef mi fill:#e7f6fe,stroke:#0079a8,color:#2c2a29,stroke-width:2px classDef human fill:#fff,stroke:#0079a8,color:#0079a8 classDef store fill:#f6f8fa,stroke:#0079a8,color:#2c2a29 classDef trig fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigtime fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigdata fill:#8ad4f5,stroke:#0079a8,color:#06314c,font-weight:bold classDef gate fill:#fff,stroke:#e8a23d,color:#6b4708,font-weight:bold classDef out fill:#1f9d6b,stroke:#167a53,color:#fff,font-weight:bold classDef pay fill:#06314c,stroke:#021f33,color:#fff