K j1*dZddlmZddlZddlZddlZddlmZmZddl m Z ddl m Z m Z ddlmZej d ZGd d eZGd d eZGddeZGddeZGddeZGddeZGddeZddZy)u data_source.py ────────────── Pluggable storage layer for the Fraud Report module. The abstract `FraudRepository` defines the contract that the API expects. `JsonFraudRepository` implements it on top of the legacy `data/fraud_log.json` file. To migrate to a database later, write a new subclass that fulfils the same contract (e.g. `PostgresFraudRepository`, `MongoFraudRepository`) and swap the `get_repository()` factory in `fraudreport.py`. The route layer, response models, and the frontend do NOT change. ) annotationsN)ABCabstractmethod)Path)IterableOptional) FraudEventzfraud_report.data_sourceceZdZdZy)FraudDataErrorz#Base class for fraud-data problems.N__name__ __module__ __qualname____doc__s/Users/priyanka/Documents/AI_Agent_Assessment/pepole_hub_candidate/people_hub_candidate/fraud_report/data_source.pyr r $s-rr ceZdZdZy)FraudDataNotFoundErrorz7Underlying store is missing (e.g. JSON file not found).Nr rrrrr(sArrceZdZdZy)FraudDataCorruptErrorz5Underlying store can't be parsed (e.g. invalid JSON).Nr rrrrr,?rrceZdZdZy)FraudDataEmptyErrorz5Store exists and is parseable but contains zero rows.Nr rrrrr0rrrceZdZdZy)AccessKeyNotFoundErrorz'The requested access key has no events.Nr rrrrr4s1rrc6eZdZdZeddZedddZy)FraudRepositoryuContract every fraud-data backend must satisfy. The methods are deliberately narrow — just what the API needs. Don't add helpers here unless every backend can implement them cheaply, otherwise it leaks JSON-specific assumptions into the abstract layer. cy)z:All distinct access keys, sorted, most-recent-event first.Nr)selfs rlist_access_keysz FraudRepository.list_access_keysBrNcy)uAll events, optionally filtered by access key. Returns an empty list if the key has no events — does NOT raise. Callers (the service layer) decide whether empty → 404. Nr)r! access_keys r fetch_eventszFraudRepository.fetch_eventsFr#rreturnz list[str]Nr% Optional[str]r(list[FraudEvent])rrrrrr"r&rrrrr9s1II  rrcDeZdZdZddZd dZd d dZd dZed dZ y)JsonFraudRepositoryuReads fraud events from a JSON array on disk. Designed to handle the messy reality of the existing `data/fraud_log.json`: • Some rows are missing `access_key` entirely (we resolve them via `metadata.access_key` or `candidate_id`). • Timestamps appear in two formats (ISO with Z, ISO with +00:00). • Rows can be reordered freely — sorting happens at the service layer, not here. c@t||_d|_d|_yr))rpath_cache _cache_mtime)r!r0s r__init__zJsonFraudRepository.__init__\sJ /3 /3rc|j}i|D]F}|j|}|s|jxs|jxsd}|vs ||kDsB||<Ht j fddS)Nc|Sr)r)kseens rz6JsonFraudRepository.list_access_keys..ns arT)keyreverse)_load_resolve_access_key created_at timestampsortedkeys)r!eventsevaktsr8s @rr"z$JsonFraudRepository.list_access_keysbs~ "B))"-B4",,4"B~d2hR diik'8$GGrNc|j}||S|j}|sgS|Dcgc]}|j||k(s|c}Scc}wr))r<stripr=)r!r%rBrDes rr&z JsonFraudRepository.fetch_eventspsX  M    I!G6aT%=%=a%@B%F6GGGs AAc |jjstd|j |jjj}|j |j|k(r |j S |jjd}|jst|jd tj|}t#|t$s-t|jd t'|j(|st|jd g}t+|D]G\}}t#|t,st.j1d |- |j3t5di|I||_||_|S#t $r!}td|jd||d}~wwxYw#t $r!}td|jd||d}~wwxYw#tj$r8}td |jd|jd |j |d}~wwxYw#t6$r"}t.j1d||Yd}~(d}~wwxYw)uRead & cache the JSON file. Hot-reloads when the mtime changes — useful in development. In production with a real DB the caching/invalidation strategy lives in that repository.zfraud_log file not found at z cannot stat z: Nzutf-8)encodingz cannot read z is emptyzinvalid JSON in z at line z root must be a JSON array, got z contains zero recordsz-skipping non-object row #%d in fraud_log.jsonz&skipping malformed fraud event #%d: %sr)r0existsrstatst_mtimeOSErrorr1r2 read_textrGrjsonloadsJSONDecodeErrorrmsglineno isinstancelisttyper enumeratedictlogwarningappendr Exception)r!mtimerHrawparsedrBidxrows rr<zJsonFraudRepository._loadzsIyy!(.tyyk:  QIINN$--E ;; "t'8'8E'A;;  Q))%%w%7Cyy{% 9&=> > ZZ_F &$''99+=d6l>S>S=TU % 3I&JK K#%!&)HCc4( KSQ N j/3/0 * ! S Q(< {"QC)HIq P Q Q(< {"QC)HIq P Q## '"499+RwizJ  ( N Dc1MM Ns_$FGG2,I G!F==G G/G**G/2H=3H88H= I+ I&&I+c|jr |jS|jxsi}t|tr|j drt |dS|j r |j Sy)uReal-world fix-up: the top-level `access_key` is sometimes absent (notably on DISQUALIFIED rows) — pull it from metadata or fall back to candidate_id, since this codebase treats those as identical in practice.r%N)r%metadatarUrYgetstr candidate_id)rCmetas rr=z'JsonFraudRepository._resolve_access_keys\ ==== {{ b dD !dhh|&<tL)* * ???? "r)r0zstr | os.PathLiker'r)r*)r(r,)rCr r(r+) rrrrr3r"r&r< staticmethodr=rrrr.r.Ps2 4 HH4l  rr.cttjjjdz dz }t j dt |}t|S)zReturn the configured FraudRepository implementation. Today: JSON file. Tomorrow: dispatch on env (`FRAUD_BACKEND=mongo`) and return the matching repository instance. datazfraud_log.jsonFRAUD_LOG_PATH)r0)r__file__resolveparentosgetenvrfr.) default_pathr0s rget_repositoryrssS X ''..7:JJ 99%s<'8 9D D ))r)r(r)r __future__rrPloggingrpabcrrpathlibrtypingrrmodelsr getLoggerrZr]r rrrrrr.rsrrrr{s#  #%g23.Y.B^B@N@@.@2^2  c .m/mj *r