+ ia0t$Rt^RIHt^RIt^RIt^RIt^RIHtHtH t ^RI H t ^RI H t/tR]R&^ t^tRR ltR R ltR R ltRRltRRltR#)ux services/captcha_service.py — CAPTCHA Service ============================================== Replaces the emoji-based AI captcha with a reliable math CAPTCHA. Reasons: - Emoji grids are ambiguous and frustrating (what counts as a "vehicle"?) - OpenAI returns different emoji sets each time — hard to verify - Math challenges are unambiguous, instant, and work offline Flow: 1. GET /api/auth/captcha/challenge → server generates math question, stores answer 2. POST /api/auth/captcha/verify → candidate submits answer, server checks it 3. On success → issues a short-lived captcha_token (used in login) ) annotationsN)datetime timedeltatimezone)settings)json_dbzdict[str, dict] _challengescV^8dQhRR/#returndict)formats"=D:\Python_Codes\gen_ai\people_hub\services\captcha_service.py __annotate__r#sBBdBc\P!.RO4pVR8Xdz\P!^^4p\P!^^ 4p\P!RR.4pVR8Xd W!8dY!r!VR8Xd W,MW, pRV RV RV R2pM\P!RR.4pVR8XdA\P!^^ 4p\P!^^ 4pW,pRV R V R2pM`\P!^^ 4p\P!^^4p\P!^^4pW,V,pRV R V R V R2pR VR \V4R V/#)zCGenerate a random arithmetic challenge. Returns {question, answer}.easy+-zWhat is  ?mulchainu × z + questionanswer answer_int)rrmedium)randomchoicerandintstr)levelabopansqvariantcs r_make_math_challenger+#sK MM4 5E  NN1b ! NN1b ! ]]C: & 9qsquqc2$as! $-- 01 e q!$Aq!$A%C1#T!A&Aq!$Aq!$Aq!$A%!)C1#S3qc+A 8SX|S AArcV^8dQhRR/#r r)rs"rrrCs$rc\4p\P!^4p\P!\ P 4\\R7,pRVR,RVRRR^/\V&RVRR R VR ,/#) ua Generate a new math CAPTCHA challenge. Returns the question to the client — never the answer. )minutesr expires_atusedFattempts session_idchallenge_typemathr) r+secrets token_urlsafernowrutcr_EXPIRY_MINUTESr)challenge_datar2r/s rcreate_challenger;Cs *+N&&r*Jhll+i.PPJ nX.jea K  *&.4 rc V^8dQhRRRR/#)r r2r"r r r)rs"rrr[s#$rcB\PVR4\4#)zg Generate a fresh challenge, invalidating the old one. Called when the user clicks the Refresh button. N)rpopr;)r2s&rrefresh_challenger?[s OOJ%  rc$V^8dQhRRRRRR/#)r r2r"rr r r)rs"rrres&NNNcNdNrc N\P!\P4p\P 4UUu.uFwr4W$R,8gKVNK pppVFp\P VR4K \PV4pV'g RRRRRRRR /#W&R,8d!\P VR4RRRRRR RR /#VR ,'d RRRRRR RR /#VPR ^4^,VR &VR ,\8d!\P VR4RRRRRRRR /#\T;'gR4P4P4p\VR,4P4P4pWx8wd#\VR ,, p RRRRRRV R2RR/#R VR &\P!^ 4p \P!\ P"RV RVRR R\P$!4/4RR RV RRRR/#uuppi)zI Verify the candidate's math answer. Returns {verified, token, message}. r/NverifiedFtokenmessagezCChallenge expired or not found. Please click Refresh and try again.refreshTz6Challenge expired. Please click Refresh for a new one.r0z>This challenge was already used. Please refresh for a new one.r1z6Too many attempts. Please refresh for a new challenge.rzIncorrect answer. z attempt(s) remaining. captcha_tokenr2 created_atuVerification successful ✓)rr7rr8ritemsr>get _MAX_ATTEMPTSr"striplowerr5r6dbinsertr SESSIONS_FILEnow_iso) r2rr7kvexpired challenge submittedcorrect remainingrCs && rverify_challengerYesB ,,x|| $C(..0J0TQCL/4Iqq0GJ 4  +I    ]     | $$ D)   P       X    &MM*a81rgsX # 22 " _! B@0Nbr