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https://github.com/aaronpo97/the-biergarten-app.git
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49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
#ifndef BIERGARTEN_PIPELINE_INCLUDES_SERVICES_ENRICHMENT_WIKIPEDIA_SERVICE_H_
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#define BIERGARTEN_PIPELINE_INCLUDES_SERVICES_ENRICHMENT_WIKIPEDIA_SERVICE_H_
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/**
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* @file services/wikipedia_service.h
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* @brief Wikipedia summary retrieval service with in-memory caching.
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*/
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#include <memory>
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#include <string>
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#include <string_view>
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#include <unordered_map>
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#include "services/enrichment/enrichment_service.h"
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#include "services/logging/logger.h"
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#include "web_client/web_client.h"
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/**
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* @brief Provides Wikipedia summary lookups backed by cached raw extracts.
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*/
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class WikipediaEnrichmentService final : public IEnrichmentService {
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public:
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/**
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* @brief Creates a new Wikipedia service with the provided web client.
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*/
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explicit WikipediaEnrichmentService(std::unique_ptr<WebClient> client,
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std::shared_ptr<ILogger> logger);
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/**
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* @brief Returns the Wikipedia-derived context for a location.
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*/
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[[nodiscard]] std::string GetLocationContext(const Location& loc) override;
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private:
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std::string FetchExtract(std::string_view query);
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std::unique_ptr<WebClient> client_;
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std::shared_ptr<ILogger> logger_;
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/**
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* @brief Cache for raw Wikipedia query extracts, keyed by query string.
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*
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* GetLocationContext() always queries "brewing" and reuses "beer in
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* {country}" for every city in that country, so caching avoids refetching
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* the same extract across locations in a run.
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*/
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std::unordered_map<std::string, std::string> extract_cache_;
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};
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#endif // BIERGARTEN_PIPELINE_INCLUDES_SERVICES_ENRICHMENT_WIKIPEDIA_SERVICE_H_
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