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Update message grouping algorithm to match Discord's

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Fixes #152
This commit is contained in:
Alexey Golub
2019-03-07 21:10:22 +02:00
parent 1f6d1f21e6
commit 9b78472e05
1 changed files with 5 additions and 10 deletions
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15
DiscordChatExporter.Core/Services/ExportService.TemplateModel.cs
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@@ -34,23 +34,19 @@ namespace DiscordChatExporter.Core.Services
var buffer = new List<Message>();
foreach (var message in messages)
{
// Get first message of the group
var groupFirstMessage = buffer.FirstOrDefault();
// Group break condition
var breakCondition =
groupFirstMessage != null &&
buffer.Any() &&
(
message.Author.Id != groupFirstMessage.Author.Id || // when author changes
(message.Timestamp - groupFirstMessage.Timestamp).TotalHours > 1 || // when difference in timestamps is an hour or more
message.Timestamp.Hour != groupFirstMessage.Timestamp.Hour || // when the timestamp's hour changes
message.Author.Id != buffer.First().Author.Id || // when author changes
(message.Timestamp - buffer.Last().Timestamp).TotalMinutes > 7 || // when more than 7 minutes passed since last message
buffer.Count >= _messageGroupLimit // when group is full
);
// If condition is true - flush buffer
if (breakCondition)
{
var group = new MessageGroup(groupFirstMessage.Author, groupFirstMessage.Timestamp, buffer);
var group = new MessageGroup(buffer.First().Author, buffer.First().Timestamp, buffer);
// Reset the buffer instead of clearing to avoid mutations on existing references
buffer = new List<Message>();
@@ -65,8 +61,7 @@ namespace DiscordChatExporter.Core.Services
// Add what's remaining in buffer
if (buffer.Any())
{
var groupFirstMessage = buffer.First();
var group = new MessageGroup(groupFirstMessage.Author, groupFirstMessage.Timestamp, buffer);
var group = new MessageGroup(buffer.First().Author, buffer.First().Timestamp, buffer);
yield return group;
}