public async Task <EditRecord> GetEditRecordAsync(string title, string content)
{
// Returns the latest upload record for a page, but only if the content hash matches.
string content_hash = OurFoodChain.StringUtils.CreateMD5(content).ToLower();
using (SQLiteConnection conn = await _getDatabaseConnectionAsync())
using (SQLiteCommand cmd = new SQLiteCommand("SELECT * FROM PageEditHistory WHERE title = $title ORDER BY timestamp DESC LIMIT 1")) {
cmd.Parameters.AddWithValue("$title", title);
using (DataTable table = await OurFoodChain.DatabaseUtils.GetRowsAsync(conn, cmd))
if (table.Rows.Count > 0)
{
EditRecord record = new EditRecord {
Id = table.Rows[0].Field <long>("id"),
Timestamp = table.Rows[0].Field <long>("timestamp"),
Title = table.Rows[0].Field <string>("title"),
ContentHash = table.Rows[0].Field <string>("content_hash")
};
if (record.ContentHash == content_hash)
{
return(record);
}
}
}
return(null);
}
public async Task <EditRecord> GetEditRecordAsync(string title, string content)
{
// Returns the latest upload record for a page, but only if the content hash matches.
string content_hash = StringUtilities.GetMD5(content).ToLower();
using (SQLiteCommand cmd = new SQLiteCommand("SELECT * FROM PageEditHistory WHERE title = $title ORDER BY timestamp DESC LIMIT 1")) {
cmd.Parameters.AddWithValue("$title", title);
IEnumerable <DataRow> rows = await database.GetRowsAsync(cmd);
if (rows.Count() > 0)
{
EditRecord record = new EditRecord {
Id = rows.First().Field <long>("id"),
Timestamp = rows.First().Field <long>("timestamp"),
Title = rows.First().Field <string>("title"),
ContentHash = rows.First().Field <string>("content_hash")
};
if (record.ContentHash == content_hash)
{
return(record);
}
}
}
return(null);
}
public async Task AddEditRecordAsync(long speciesId, EditRecord record)
{
using (SQLiteCommand cmd = new SQLiteCommand("INSERT INTO SpeciesPageEditHistory(timestamp, edit_id, species_id) VALUES($timestamp, $edit_id, $species_id)")) {
cmd.Parameters.AddWithValue("$timestamp", record.Timestamp);
cmd.Parameters.AddWithValue("$edit_id", record.Id);
cmd.Parameters.AddWithValue("$species_id", speciesId);
await database.ExecuteNonQueryAsync(cmd);
}
}
private static async Task <bool> _editPageAsync(MediaWikiClient client, EditHistory history, string pageTitle, string pageContent)
{
// Check to see if we've made this edit before.
// If we've already made this page before, don't do anything.
EditRecord record = await history.GetEditRecordAsync(pageTitle, pageContent);
if (record is null)
{
// Get existing page content.
// This allows us to make sure that no one has removed the "{{BotGenerated}}" flag.
// If it has been removed, do not modify the page.
MediaWikiApiParseRequestResult parse_result = client.Parse(pageTitle, new ParseParameters());
if (parse_result.ErrorCode == ErrorCode.MissingTitle || parse_result.Text.Contains(BotFlag))
{
if (parse_result.ErrorCode == ErrorCode.MissingTitle)
{
_log(string.Format("creating page \"{0}\"", pageTitle));
}
else
{
_log(string.Format("editing page \"{0}\"", pageTitle));
}
try {
client.Edit(pageTitle, new EditParameters {
Action = EditAction.Text,
Text = pageContent
});
// Make a record of the edit.
await history.AddEditRecordAsync(pageTitle, pageContent);
// Return true to indicate that edits have occurred.
return(true);
}
catch (Exception ex) {
_log(ex.ToString());
}
}
else
{
_log(string.Format("skipping page \"{0}\" (manually edited)", pageTitle));
}
}
else
{
_log(string.Format("skipping page \"{0}\" (previously edited)", pageTitle));
}
// Return false to indicate that no edits have occurred.
return(false);
}
private static async Task _editSpeciesPageAsync(MediaWikiClient client, EditHistory history, Species species, string pageTitle, string pageContent)
{
if (await _editPageAsync(client, history, pageTitle, pageContent))
{
// If the edit was successful, associated it with this species.
EditRecord record = await history.GetEditRecordAsync(pageTitle, pageContent);
if (record != null)
{
await history.AddEditRecordAsync(species.Id, record);
// Because it's possible that the species was renamed, we need to look at past edits to find previous titles of the same page.
// Old pages for renamed species will be deleted.
EditRecord[] edit_records = (await history.GetEditRecordsAsync(species.Id))
.Where(x => x.Id != record.Id && x.Title.ToLower() != record.Title.ToLower())
.ToArray();
// Delete all created pages where the old title does not match the current title.
foreach (EditRecord i in edit_records)
{
MediaWikiApiParseRequestResult parse_result = client.Parse(i.Title, new ParseParameters());
if (parse_result.Text.Contains(BotFlag))
{
// Only delete pages that haven't been manually edited.
client.Delete(i.Title, new DeleteParameters {
Reason = "species page moved to " + pageTitle
});
// Add an edit record for this page so that we can restore the content later without it thinking we've already made this edit.
// This is important, because this step can delete redirects when a page with redirects is updated. By creating a new edit record, the redirect will be recreated.
await history.AddEditRecordAsync(i.Title, string.Empty);
}
}
// We also need to delete any redirect pages that are now invalid (i.e. when specific epithet that points to a common name is changed).
// Delete all redirects that point to this page (or one of this page's previous titles).
RedirectRecord[] redirect_records = (await history.GetRedirectRecordsAsync())
.Where(i => i.Target == pageTitle || edit_records.Any(j => j.Title == i.Target)) // points to the title of this page, or one of its previous titles
.Where(i => i.Title != species.FullName) // the title doesn't match this species' full name (the species has been renamed)
.ToArray();
foreach (RedirectRecord j in redirect_records)
{
MediaWikiApiParseRequestResult parse_result = client.Parse(j.Title, new ParseParameters());
if (parse_result.IsRedirect && parse_result.Text.Contains(BotFlag))
{
// Only delete pages that haven't been manually edited.
client.Delete(j.Title, new DeleteParameters {
Reason = "outdated redirect"
});
}
}
}
}
}