/// <summary>
/// returns a list of OmdbEntrys that can be combines with imdb data to form a complete ombd entry
/// </summary>
/// <param name="filepath"></param>
/// <returns></returns>
public static List <OmdbEntry> ParseTSVforTomatoesData(string filepath)
{
Tools.TraceLine("Start Parsing for Tomatoes");
List <OmdbEntry> omdbEntry_list;
//omdbEntry_list = existing_list ?? new List<OmdbEntry>();
omdbEntry_list = new List <OmdbEntry>();
using (
CsvReader csvReader = new CsvReader(new StreamReader(filepath),
true, '\t', '~', '`', '~',
ValueTrimmingOptions.None)) {
int count = 0;
//loop over all the rows until fail, adding the created entry to list
while (csvReader.ReadNextRecord())
{
var entry =
Omdb.CreateOmdbEntryFromTsvRecord(tomReader: csvReader);
omdbEntry_list.Add(entry);
//Tools.TraceLine(count.ToString());
count++;
}
Tools.TraceLine("Done Parsing for Tomatoes");
return(omdbEntry_list);
}
}
/// <summary>
/// Parses the TSV with the IMDB movie data and gets saved to the db
/// </summary>
/// <param name="imdb_filepath">the path to the omdb.txt with the IMDB movie data</param>
/// <param name="numOfMoviesPerLoop">5000 is about 180MB, 10000 was around 240MB 15000 can be as high as 300MB</param>
private static void OptimizedImdbTsvParse(string imdb_filepath, int numOfMoviesPerLoop = 5000)
{
//build a list of hashes
MovieDbContext tempDb = new MovieDbContext();
//List<int> omdbHashes =
// tempDb.Omdb.Select(item => item.GetHashCode()).ToList();
//create a list of hashes for the omdbentrys in the db
List <int> omdbHashes = new List <int>();
foreach (OmdbEntry omdb in tempDb.Omdb)
{
omdbHashes.Add(omdb.GetHashCode());
}
var omdbDistinctHashes = omdbHashes
.Distinct()
.ToList();
//read numOfMoviesPerLoop movies until all the IMDB movies are parsed
//5000 is about 180MB, 10000 was around 240MB 15000 can be as high as 300MB "
using (
CsvReader imdb_csvReader =
new CsvReader(new StreamReader(imdb_filepath), true, '\t',
'~', '`', '~', ValueTrimmingOptions.None)) {
while (imdb_csvReader.ReadNextRecord())
{
//loop through the imdbtsv, creating a omdbentry for the first 500 items
List <OmdbEntry> small_omdbEntry_list = new List <OmdbEntry>();
for (int i = 0; i < numOfMoviesPerLoop; i++)
{
//read the row and create an omdb from it
var entry =
Omdb.CreateOmdbEntryFromTsvRecord(
imdbReader: imdb_csvReader);
small_omdbEntry_list.Add(entry);
//if nothing left to read, break out of the loop
if (imdb_csvReader.ReadNextRecord() == false)
{
Tools.TraceLine(
"ReadNextRecord was false, breaking out of loop to save it");
break;
}
}
//save the small_omdbEntry_list to db, but check for dupes first
MovieDbContext db = new MovieDbContext();
db.Configuration.AutoDetectChangesEnabled = false;
//for each omdbentry hash not in the list of hashes, add to db
foreach (
OmdbEntry omdbEntry in
small_omdbEntry_list.Where(
omdbEntry =>
!omdbHashes.Contains(omdbEntry.GetHashCode())))
{
db.Omdb.Add(omdbEntry);
}
Tools.TraceLine(
"saving omdbs. # of omdbs in table before save: {0}",
db.Omdb.Count());
db.SaveChanges();
db.Configuration.AutoDetectChangesEnabled = true;
}
Tools.TraceLine("Done saving IMDB OmdbEntrys");
}
}
/// <summary>
/// Parsed a TSV for RT data then adds the new data to existing IMDB OmdbEntrys in the db
/// </summary>
/// <param name="tom_filepath"></param>
public static void OptimizedRtTsvParse(string tom_filepath)
{
//i don't think this is necessary, because you always want to update the RT data
////build a list of hashes
//MovieDbContext tempDb = new MovieDbContext();
//List<int> omdbHashes =
// tempDb.Omdb.Select(item => item.GetHashCode())
// .Distinct()
// .ToList();
int num_of_RT_movies_per_loop = 5000;
using (
CsvReader tom_csvReader =
new CsvReader(new StreamReader(tom_filepath), true, '\t',
'~', '`', '~', ValueTrimmingOptions.None)) {
while (tom_csvReader.ReadNextRecord())
{
//loop through the imdbtsv, creating a omdbentry for the first 5000 items
List <OmdbEntry> new_tom_omdb_entries = new List <OmdbEntry>();
for (int i = 0; i < num_of_RT_movies_per_loop; i++)
{
//read the row and create an omdb from it parse the current TSV row
var entry =
Omdb.CreateOmdbEntryFromTsvRecord(tomReader: tom_csvReader);
// add entry to a list
new_tom_omdb_entries.Add(entry);
//if nothing left to read, break out of the loop
if (tom_csvReader.ReadNextRecord() == false)
{
Tools.TraceLine(
"ReadNextRecord was false, breaking out of loop to save it");
break;
}
}
//find all existing IMDB entries in db
MovieDbContext db = new MovieDbContext();
db.Configuration.AutoDetectChangesEnabled = true;
//find all existing OE that match the omdb_ids of the listed ones
Tools.TraceLine("items in db.Omdb {0}", db.Omdb.Count());
//get the omdb_ids of the new RT omdbentrys
List <int> tom_omdb_ids_to_match =
new_tom_omdb_entries.Select(omdb => omdb.ombd_ID)
.ToList();
//match the ids to the exist IMDB omdbentries
var res = (from imdb in db.Omdb
where tom_omdb_ids_to_match.Contains(imdb.ombd_ID)
select imdb);
//Tools.TraceLine("items in res {0}", res.Count());
List <OmdbEntry> matched_existing_imdb_omdbentrys = res.ToList();
//alter the existing IMDB entries and save the changes...
foreach (
OmdbEntry matchedExistingImdbOmdbentry in
matched_existing_imdb_omdbentrys)
{
//the RT omdb tha matches the imdb entry for the omdb_id
var matching_RT_data =
new_tom_omdb_entries.First(
item =>
item.ombd_ID ==
matchedExistingImdbOmdbentry.ombd_ID);
//updates the IMDB OmdbEntry with the RT OmdbEntry's information
UpdateImdbEntryWithRtEntry(matchedExistingImdbOmdbentry,
matching_RT_data);
}
//save the updated OmdbEntry information, dispose of the context
db.SaveChanges();
db.Dispose();
Tools.TraceLine("Updated existing IMDB OmdbEntrys, done saving");
}
}
}