92 lines
2.7 KiB
C++
92 lines
2.7 KiB
C++
#include "model/database/database.h"
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Database::Database(string filename){
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this->filename = filename;
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openConnection();
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}
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Database::~Database(){
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closeConnection();
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}
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ResultTable Database::executeSQL(string statement){
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sqlite3_stmt* stmt;
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this->sql = statement;
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this->returnCode = sqlite3_prepare_v2(this->db, statement.c_str(), -1, &stmt, NULL);
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ResultTable t;
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if (this->returnCode != SQLITE_OK){
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fprintf(stderr, "Unable to successfully prepare SQL statement. Error code: %d\n\tError Message: %s\n", this->returnCode, sqlite3_errmsg(this->db));
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return t;
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}
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t.extractData(stmt);
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this->returnCode = sqlite3_finalize(stmt);
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return t;
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}
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bool Database::insertInto(string tableName, vector<string> columnNames, vector<string> values){
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if (columnNames.size() != values.size() || columnNames.empty()){
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return false;
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}
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string query = "INSERT INTO "+tableName+" (";
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string cols = combineVector(columnNames, ", ");
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string vals = combineVector(values, ", ");
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query += cols + ") VALUES (" + vals + ");";
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ResultTable t = this->executeSQL(query);
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return (t.getReturnCode() == SQLITE_DONE);
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}
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ResultTable Database::selectFrom(string tableName, string columnNames, string conditions){
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if (columnNames.size() == 0 || tableName.empty()){
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return ResultTable();
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}
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string query = "SELECT " + columnNames + " FROM " + tableName + " WHERE " + conditions + ";";
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return this->executeSQL(query);
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}
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void Database::openConnection(){
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this->returnCode = sqlite3_open(this->filename.c_str(), &this->db);
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if (this->returnCode || this->db == NULL){
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this->dbIsOpen = false;
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fprintf(stderr, "Can't open database: %s\n", sqlite3_errmsg(db));
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exit(EXIT_FAILURE);
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} else {
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this->dbIsOpen = true;
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}
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}
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void Database::closeConnection(){
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this->returnCode = sqlite3_close(this->db);
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this->dbIsOpen = false;
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}
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string Database::combineVector(std::vector<string> strings, string mid){
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if (strings.empty()){
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return "";
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}
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std::string result = surroundString(strings[0], "'");
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for (std::vector<std::string>::iterator it = strings.begin() + 1; it != strings.end(); ++it){
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result += mid + surroundString((*it), "'");
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}
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return result;
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}
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string Database::surroundString(string s, string surround){
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return surround+s+surround;
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}
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bool Database::tableExists(string tableName){
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if (tableName.empty() || this->db == NULL || !this->dbIsOpen){
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return false;
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}
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ResultTable t = this->selectFrom("sqlite_master", "name", "type='table' AND name='"+tableName+"'");
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//ResultTable t = executeSQL("SELECT name FROM sqlite_master WHERE type='table' AND name='"+tableName+"';");
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return !t.isEmpty();
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}
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int Database::getLastInsertedRowId(){
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return sqlite3_last_insert_rowid(this->db);
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}
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