C++ SqliteDatabase::add方法代码示例

vector <int> Database_MorphHb::rowids (int book, int chapter, int verse)
{
    SqliteDatabase sql = SqliteDatabase (filename ());
    sql.add ("SELECT rowid FROM morphhb WHERE book =");
    sql.add (book);
    sql.add ("AND chapter =");
    sql.add (chapter);
    sql.add ("AND verse =");
    sql.add (verse);
    sql.add ("ORDER BY rowid;");
    vector <string> result = sql.query () ["rowid"];
    vector <int> rowids;
    for (auto rowid : result) rowids.push_back (convert_to_int (rowid));
    return rowids;
}

// Returns true if a record for $username / $bible / $book exists in the database.
// When the $book = 0, it takes any book.
bool Database_Privileges::getBibleBookExists (string username, string bible, int book)
{
  SqliteDatabase sql (database ());
  sql.add ("SELECT rowid FROM bibles WHERE username =");
  sql.add (username);
  sql.add ("AND bible =");
  sql.add (bible);
  if (book) {
    sql.add ("AND book =");
    sql.add (book);
  }
  sql.add (";");
  vector <string> result = sql.query () ["rowid"];
  return !result.empty();
}

// Remove privileges for $username from the entire database.
void Database_Privileges::removeUser (string username)
{
  SqliteDatabase sql (database ());
  sql.add ("DELETE FROM bibles WHERE username =");
  sql.add (username);
  sql.add (";");
  sql.execute ();
  sql.clear ();
  sql.add ("DELETE FROM features WHERE username =");
  sql.add (username);
  sql.add (";");
  sql.execute ();
}

// Returns whether the device that matches the remote IP $address and the browser's user $agent,
// and the other fingerprint, is touch-enabled.
bool Database_Login::getTouchEnabled (string address, string agent, string fingerprint)
{
  address = md5 (address);
  agent = md5 (agent);
  fingerprint = md5 (fingerprint);
  SqliteDatabase sql (database ());
  sql.add ("SELECT touch FROM logins WHERE address =");
  sql.add (address);
  sql.add ("AND agent =");
  sql.add (agent);
  sql.add ("AND fingerprint =");
  sql.add (fingerprint);
  sql.add (";");
  vector <string> result = sql.query () ["touch"];
  if (!result.empty()) return convert_to_bool (result [0]);
  return false;
}

// Read the privilege from the database whether $username has access to $bible $book.
// The privileges are stored in $read for read-only access,
// and in $write for write access.
void Database_Privileges::getBibleBook (string username, string bible, int book, bool & read, bool & write)
{
  SqliteDatabase sql (database ());
  sql.add ("SELECT write FROM bibles WHERE username =");
  sql.add (username);
  sql.add ("AND bible =");
  sql.add (bible);
  sql.add ("AND book =");
  sql.add (book);
  sql.add (";");
  vector <string> result = sql.query () ["write"];
  if (result.empty()) {
    // Not in database: No access.
    read = false;
    write = false;
  } else {
    // Occurs in database: Read access.
    read = true;
    // Take write access from the database field.
    write = convert_to_bool (result [0]);
  }
}

string Database_Privileges::save (string username)
{
  SqliteDatabase sql (database ());
  
  vector <string> lines;

  lines.push_back (bibles_start ());
  sql.add ("SELECT bible, book, write FROM bibles WHERE username =");
  sql.add (username);
  sql.add (";");
  map <string, vector <string> > result = sql.query ();
  vector <string> bible = result ["bible"];
  vector <string> book =  result ["book"];
  vector <string> write = result ["write"];
  for (size_t i = 0; i < bible.size (); i++) {
    lines.push_back (bible [i]);
    lines.push_back (book [i]);
    // It could have just stored 0 or 1 for the boolean values.
    // But if that were done, then there would be no change in the length of the file
    // when changing only boolean values.
    // And then the client would not re-download that file.
    // To use "on" and "off", that solves the issue.
    bool b = convert_to_bool (write[i]);
    if (b) lines.push_back (on ());
    else lines.push_back (off ());
  }
  lines.push_back (bibles_end ());
  
  lines.push_back (features_start ());
  sql.clear ();
  sql.add ("SELECT feature FROM features WHERE username =");
  sql.add (username);
  sql.add (";");
  result = sql.query ();
  vector <string> feature = result ["feature"];
  for (size_t i = 0; i < feature.size (); i++) {
    lines.push_back (feature [i]);
  }
  lines.push_back (features_end ());
  
  return filter_string_implode (lines, "\n");
}

// stores a confirmation cycle
void Database_Confirm::store (unsigned int id, string query, string to, string subject, string body)
{
  SqliteDatabase sql (filename ());
  sql.add ("INSERT INTO confirm VALUES (");
  sql.add (id);
  sql.add (",");
  sql.add (query);
  sql.add (",");
  sql.add (filter_date_seconds_since_epoch ());
  sql.add (",");
  sql.add (to);
  sql.add (",");
  sql.add (subject);
  sql.add (",");
  sql.add (body);
  sql.add (");");
  sql.execute ();
}

void Database_Confirm::optimize ()
{
  SqliteDatabase sql (filename ());
  sql.add ("VACUUM confirm;");
  sql.execute ();
}

void Database_MorphGnt::store (int book, int chapter, int verse,
                               string pos, string parsing, string word, string lemma)
{
  int pos_id = get_id ("pos", pos);
  int parsing_id = get_id ("parsing", parsing);
  int word_id = get_id ("word", word);
  int lemma_id = get_id ("lemma", lemma);
  SqliteDatabase sql = SqliteDatabase (filename ());
  sql.add ("PRAGMA temp_store = MEMORY;");
  sql.execute ();
  sql.clear ();
  sql.add ("PRAGMA synchronous = OFF;");
  sql.execute ();
  sql.clear ();
  sql.add ("PRAGMA journal_mode = OFF;");
  sql.execute ();
  sql.clear ();
  sql.add ("INSERT INTO morphgnt VALUES (");
  sql.add (book);
  sql.add (",");
  sql.add (chapter);
  sql.add (",");
  sql.add (verse);
  sql.add (",");
  sql.add (pos_id);
  sql.add (",");
  sql.add (parsing_id);
  sql.add (",");
  sql.add (word_id);
  sql.add (",");
  sql.add (lemma_id);
  sql.add (");");
  sql.execute ();
}

void Database_MorphGnt::optimize ()
{
  SqliteDatabase sql = SqliteDatabase (filename ());
  sql.add ("VACUUM;");
  sql.execute ();
}

string Database_MorphGnt::get_item (const char * item, int rowid)
{
  // The $rowid refers to the main table.
  // Update it so it refers to the sub table.
  SqliteDatabase sql = SqliteDatabase (filename ());
  sql.add ("SELECT");
  sql.add (item);
  sql.add ("FROM morphgnt WHERE rowid =");
  sql.add (rowid);
  sql.add (";");
  vector <string> result = sql.query () [item];
  rowid = 0;
  if (!result.empty ()) rowid = convert_to_int (result [0]);
  // Retrieve the requested value from the sub table.
  sql.clear ();
  sql.add ("SELECT");
  sql.add (item);
  sql.add ("FROM");
  sql.add (item);
  sql.add ("WHERE rowid =");
  sql.add (rowid);
  sql.add (";");
  result = sql.query () [item];
  if (!result.empty ()) return result [0];
  // Not found.
  return "";
}

int Database_MorphGnt::get_id (const char * table_row, string item)
{
  SqliteDatabase sql = SqliteDatabase (filename ());
  // Two iterations to be sure a rowid can be returned.
  for (unsigned int i = 0; i < 2; i++) {
    // Check on the rowid and return it if it's there.
    sql.clear ();
    sql.add ("SELECT rowid FROM");
    sql.add (table_row);
    sql.add ("WHERE");
    sql.add (table_row);
    sql.add ("=");
    sql.add (item);
    sql.add (";");
    vector <string> result = sql.query () ["rowid"];
    if (!result.empty ()) return convert_to_int (result [0]);
    // The rowid was not found: Insert the word into the table.
    // The rowid will now be found during the second iteration.
    sql.clear ();
    sql.add ("INSERT INTO");
    sql.add (table_row);
    sql.add ("VALUES (");
    sql.add (item);
    sql.add (");");
    sql.execute ();
  }
  return 0;
}

// Returns the username that matches the remote IP $address and the browser's user $agent,
// and the other fingerprints from the user.
string Database_Login::getUsername (string address, string agent, string fingerprint)
{
  address = md5 (address);
  agent = md5 (agent);
  fingerprint = md5 (fingerprint);
  SqliteDatabase sql (database ());
  sql.add ("SELECT rowid, timestamp, username FROM logins WHERE address =");
  sql.add (address);
  sql.add ("AND agent =");
  sql.add (agent);
  sql.add ("AND fingerprint =");
  sql.add (fingerprint);
  sql.add (";");
  map <string, vector <string> > result = sql.query ();
  if (result.empty()) return "";
  string username = result ["username"][0];
  int stamp = convert_to_int (result ["timestamp"] [0]);
  if (stamp != timestamp ()) {
    // Touch the timestamp. This occurs once a day.
    int rowid = convert_to_int (result ["rowid"] [0]);
    sql.clear ();
    sql.add ("UPDATE logins SET timestamp =");
    sql.add (timestamp ());
    sql.add ("WHERE rowid =");
    sql.add (rowid);
    sql.execute ();
  }
  return username;
}

void Database_Login::renameTokens (string username_existing, string username_new,
                                   string address, string agent, string fingerprint)
{
  address = md5 (address);
  agent = md5 (agent);
  fingerprint = md5 (fingerprint);
  SqliteDatabase sql (database ());
  sql.add ("UPDATE logins SET username =");
  sql.add (username_new);
  sql.add ("WHERE username =");
  sql.add (username_existing);
  sql.add ("AND address =");
  sql.add (address);
  sql.add ("AND agent =");
  sql.add (agent);
  sql.add ("AND fingerprint =");
  sql.add (fingerprint);
  sql.add (";");
  sql.execute ();
}

void Database_Login::testTimestamp ()
{
  SqliteDatabase sql (database ());
  sql.add ("UPDATE logins SET timestamp = timestamp - 370;");
  sql.execute ();
}