Структуры и классы/Методы классов/Задание 2

#include <algorithm>
#include <iostream>
#include <map>
#include <set>
#include <string>
#include <utility>
#include <vector>

using namespace std;

/*
const int MAX_RESULT_DOCUMENT_COUNT = 5;


string ReadLine() {
    string s;
    getline(cin, s);
    return s;
}

int ReadLineWithNumber() {
    int result;
    cin >> result;
    ReadLine();
    return result;
}
*/

vector<string> SplitIntoWords(const string& text) {
    vector<string> words;
    string word;
    for (const char c : text) {
        if (c == ' ') {
            words.push_back(word);
            word = "";
        } else {
            word += c;
        }
    }
    words.push_back(word);

    return words;
}

/*
set<string> ParseStopWords(const string& text) {
    set<string> stop_words;
    for (const string& word : SplitIntoWords(text)) {
        stop_words.insert(word);
    }
    return stop_words;
}
*/

class SearchServer {
public:
    void AddDocument(int document_id, const string& document) {
        for (const string& word : SplitIntoWordsNoStop(document)) {
            word_to_documents_[word].insert(document_id);
        }
    }

private:
    map<string, set<int>> word_to_documents_;
    set<string> stop_words_;

    vector<string> SplitIntoWordsNoStop(const string& text) {
        vector<string> words;
        for (const string& word : SplitIntoWords(text)) {
            if (stop_words_.count(word) == 0) {
                words.push_back(word);
            }
        }
        return words;
    }
};

/*
struct Document {
    int id;
    int relevance;
};

vector<Document> FindAllDocuments(
        const map<string, set<int>>& word_to_documents,
        const set<string>& stop_words,
        const string& query) {

    const vector<string> query_words = SplitIntoWordsNoStop(query, stop_words);
    map<int, int> document_to_relevance;
    for (const string& word : query_words) {
        if (word_to_documents.count(word) == 0) {
            continue;
        }
        for (const int document_id : word_to_documents.at(word)) {
            ++document_to_relevance[document_id];
        }
    }

    vector<Document> matched_documents;
    for (auto [document_id, relevance] : document_to_relevance) {
        matched_documents.push_back({document_id, relevance});
    }

    return matched_documents;
}

bool HasDocumentGreaterRelevance(const Document& lhs, const Document& rhs) {
    return lhs.relevance > rhs.relevance;
}

vector<Document> FindTopDocuments(
        const map<string, set<int>>& word_to_documents,
        const set<string>& stop_words,
        const string& query) {

    auto matched_documents = FindAllDocuments(word_to_documents, stop_words, query);

    sort(matched_documents.begin(), matched_documents.end(), HasDocumentGreaterRelevance);
    if (matched_documents.size() > MAX_RESULT_DOCUMENT_COUNT) {
        matched_documents.resize(MAX_RESULT_DOCUMENT_COUNT);
    }
    return matched_documents;
}


int main() {
    const string stop_words_joined = ReadLine();
    const set<string> stop_words = ParseStopWords(stop_words_joined);

    // Read documents
    map<string, set<int>> word_to_documents;
    const int document_count = ReadLineWithNumber();
    for (int document_id = 0; document_id < document_count; ++document_id) {
        AddDocument(word_to_documents, stop_words, document_id, ReadLine());
    }

    const string query = ReadLine();
    for (auto [document_id, relevance] : FindTopDocuments(word_to_documents, stop_words, query)) {
        cout << "{ document_id = " << document_id << ", relevance = " << relevance << " }" << endl;
    }
}
*/