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291 lines
9.6 KiB
291 lines
9.6 KiB
--- /dev/null
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+++ b/modules/playback.cpp
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@@ -0,0 +1,288 @@
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+/*
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+ * Copyright (C) 2015 J-P Nurmi
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+ *
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+ * Licensed under the Apache License, Version 2.0 (the "License");
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+ * you may not use this file except in compliance with the License.
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+ * You may obtain a copy of the License at
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+ *
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+ * http://www.apache.org/licenses/LICENSE-2.0
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+ *
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+ * Unless required by applicable law or agreed to in writing, software
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+ * distributed under the License is distributed on an "AS IS" BASIS,
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+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ * See the License for the specific language governing permissions and
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+ * limitations under the License.
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+ */
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+
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+#include <znc/Modules.h>
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+#include <znc/IRCNetwork.h>
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+#include <znc/Client.h>
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+#include <znc/Buffer.h>
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+#include <znc/Utils.h>
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+#include <znc/Query.h>
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+#include <znc/Chan.h>
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+#include <znc/znc.h>
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+#include <znc/version.h>
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+#include <sys/time.h>
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+#include <cfloat>
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+
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+#if (VERSION_MAJOR < 1) || (VERSION_MAJOR == 1 && VERSION_MINOR < 6)
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+#error The playback module requires ZNC version 1.6.0 or later.
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+#endif
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+
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+static const char* PlaybackCap = "znc.in/playback";
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+
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+class CPlaybackMod : public CModule
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+{
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+public:
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+ MODCONSTRUCTOR(CPlaybackMod)
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+ {
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+ m_play = false;
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+ AddHelpCommand();
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+ AddCommand("Clear", static_cast<CModCommand::ModCmdFunc>(&CPlaybackMod::ClearCommand), "<buffer(s)>", "Clears playback for given buffers.");
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+ AddCommand("Play", static_cast<CModCommand::ModCmdFunc>(&CPlaybackMod::PlayCommand), "<buffer(s)> [from] [to]", "Sends playback for given buffers.");
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+ AddCommand("List", static_cast<CModCommand::ModCmdFunc>(&CPlaybackMod::ListCommand), "[buffer(s)]", "Lists available/matching buffers.");
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+ AddCommand("Limit", static_cast<CModCommand::ModCmdFunc>(&CPlaybackMod::LimitCommand), "<client> [limit]", "Get/set the buffer limit (<= 0 to clear) for the given client.");
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+ }
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+
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+ void OnClientCapLs(CClient* client, SCString& caps) override
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+ {
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+ caps.insert(PlaybackCap);
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+ }
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+
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+ bool IsClientCapSupported(CClient* client, const CString& cap, bool state) override
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+ {
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+ return cap.Equals(PlaybackCap);
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+ }
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+
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+ EModRet OnChanBufferStarting(CChan& chan, CClient& client) override
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+ {
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+ if (!m_play && client.IsCapEnabled(PlaybackCap))
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+ return HALTCORE;
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+ return CONTINUE;
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+ }
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+
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+ EModRet OnChanBufferPlayLine(CChan& chan, CClient& client, CString& line) override
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+ {
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+ if (!m_play && client.IsCapEnabled(PlaybackCap))
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+ return HALTCORE;
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+ return CONTINUE;
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+ }
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+
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+ EModRet OnChanBufferEnding(CChan& chan, CClient& client) override
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+ {
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+ if (!m_play && client.IsCapEnabled(PlaybackCap))
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+ return HALTCORE;
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+ return CONTINUE;
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+ }
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+
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+ EModRet OnPrivBufferPlayLine(CClient& client, CString& line) override
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+ {
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+ if (!m_play && client.IsCapEnabled(PlaybackCap))
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+ return HALTCORE;
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+ return CONTINUE;
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+ }
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+
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+ void ClearCommand(const CString& line)
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+ {
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+ // CLEAR <buffer(s)>
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+ const CString arg = line.Token(1);
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+ if (arg.empty() || !line.Token(2).empty())
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+ return;
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+ std::vector<CChan*> chans = FindChans(arg);
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+ for (CChan* chan : chans)
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+ chan->ClearBuffer();
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+ std::vector<CQuery*> queries = FindQueries(arg);
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+ for (CQuery* query : queries)
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+ query->ClearBuffer();
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+ }
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+
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+ void PlayCommand(const CString& line)
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+ {
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+ // PLAY <buffer(s)> [from] [to]
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+ const CString arg = line.Token(1);
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+ if (arg.empty() || !line.Token(4).empty())
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+ return;
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+ double from = line.Token(2).ToDouble();
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+ double to = DBL_MAX;
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+ if (!line.Token(3).empty())
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+ to = line.Token(3).ToDouble();
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+ int limit = -1;
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+ if (CClient* client = GetClient())
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+ limit = GetLimit(client->GetIdentifier());
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+ std::vector<CChan*> chans = FindChans(arg);
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+ for (CChan* chan : chans) {
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+ if (chan->IsOn() && !chan->IsDetached()) {
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+ CBuffer lines = GetLines(chan->GetBuffer(), from, to, limit);
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+ m_play = true;
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+ chan->SendBuffer(GetClient(), lines);
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+ m_play = false;
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+ }
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+ }
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+ std::vector<CQuery*> queries = FindQueries(arg);
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+ for (CQuery* query : queries) {
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+ CBuffer lines = GetLines(query->GetBuffer(), from, to, limit);
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+ m_play = true;
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+ query->SendBuffer(GetClient(), lines);
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+ m_play = false;
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+ }
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+ }
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+
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+ void ListCommand(const CString& line)
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+ {
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+ // LIST [buffer(s)]
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+ CString arg = line.Token(1);
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+ if (arg.empty())
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+ arg = "*";
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+ std::vector<CChan*> chans = FindChans(arg);
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+ for (CChan* chan : chans) {
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+ if (chan->IsOn() && !chan->IsDetached()) {
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+ CBuffer buffer = chan->GetBuffer();
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+ if (!buffer.IsEmpty()) {
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+ timeval from = UniversalTime(buffer.GetBufLine(0).GetTime());
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+ timeval to = UniversalTime(buffer.GetBufLine(buffer.Size() - 1).GetTime());
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+ PutModule(chan->GetName() + " " + CString(Timestamp(from)) + " " + CString(Timestamp(to)));
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+ }
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+ }
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+ }
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+ std::vector<CQuery*> queries = FindQueries(arg);
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+ for (CQuery* query : queries) {
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+ CBuffer buffer = query->GetBuffer();
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+ if (!buffer.IsEmpty()) {
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+ timeval from = UniversalTime(buffer.GetBufLine(0).GetTime());
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+ timeval to = UniversalTime(buffer.GetBufLine(buffer.Size() - 1).GetTime());
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+ PutModule(query->GetName() + " " + CString(Timestamp(from)) + " " + CString(Timestamp(to)));
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+ }
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+ }
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+ }
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+
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+ void LimitCommand(const CString& line)
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+ {
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+ // LIMIT <client> [limit]
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+ const CString client = line.Token(1);
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+ if (client.empty()) {
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+ PutModule("Usage: LIMIT <client> [limit]");
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+ return;
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+ }
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+ const CString arg = line.Token(2);
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+ int limit = GetLimit(client);
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+ if (!arg.empty()) {
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+ limit = arg.ToInt();
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+ SetLimit(client, limit);
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+ }
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+ if (limit <= 0)
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+ PutModule(client + " buffer limit: -");
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+ else
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+ PutModule(client + " buffer limit: " + CString(limit));
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+ }
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+
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+ EModRet OnSendToClient(CString& line, CClient& client) override
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+ {
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+ if (client.IsAttached() && client.IsCapEnabled(PlaybackCap) && !line.Token(0).Equals("CAP")) {
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+ MCString tags = CUtils::GetMessageTags(line);
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+ if (tags.find("time") == tags.end()) {
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+ // CUtils::FormatServerTime() converts to UTC
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+ tags["time"] = CUtils::FormatServerTime(LocalTime());
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+ CUtils::SetMessageTags(line, tags);
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+ }
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+ }
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+ return CONTINUE;
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+ }
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+
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+private:
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+ static double Timestamp(timeval tv)
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+ {
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+ return tv.tv_sec + tv.tv_usec / 1000000.0;
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+ }
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+
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+ static timeval LocalTime()
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+ {
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+ timeval tv;
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+ if (gettimeofday(&tv, NULL) == -1) {
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+ tv.tv_sec = time(NULL);
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+ tv.tv_usec = 0;
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+ }
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+ return tv;
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+ }
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+
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+ static timeval UniversalTime(timeval tv = LocalTime())
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+ {
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+ tm stm;
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+ memset(&stm, 0, sizeof(stm));
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+ const time_t secs = tv.tv_sec; // OpenBSD has tv_sec as int, so explicitly convert it to time_t to make gmtime_r() happy
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+ gmtime_r(&secs, &stm);
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+ const char* tz = getenv("TZ");
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+ setenv("TZ", "UTC", 1);
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+ tzset();
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+ tv.tv_sec = mktime(&stm);
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+ if (tz)
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+ setenv("TZ", tz, 1);
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+ else
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+ unsetenv("TZ");
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+ tzset();
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+ return tv;
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+ }
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+
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+ std::vector<CChan*> FindChans(const CString& arg) const
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+ {
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+ std::vector<CChan*> chans;
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+ CIRCNetwork* network = GetNetwork();
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+ if (network) {
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+ VCString vargs;
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+ arg.Split(",", vargs, false);
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+
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+ for (const CString& name : vargs) {
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+ std::vector<CChan*> found = network->FindChans(name);
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+ chans.insert(chans.end(), found.begin(), found.end());
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+ }
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+ }
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+ return chans;
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+ }
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+
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+ std::vector<CQuery*> FindQueries(const CString& arg) const
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+ {
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+ std::vector<CQuery*> queries;
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+ CIRCNetwork* network = GetNetwork();
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+ if (network) {
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+ VCString vargs;
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+ arg.Split(",", vargs, false);
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+
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+ for (const CString& name : vargs) {
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+ std::vector<CQuery*> found = network->FindQueries(name);
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+ queries.insert(queries.end(), found.begin(), found.end());
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+ }
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+ }
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+ return queries;
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+ }
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+
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+ int GetLimit(const CString& client) const
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+ {
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+ return GetNV(client).ToInt();
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+ }
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+
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+ void SetLimit(const CString& client, int limit)
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+ {
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+ if (limit > 0)
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+ SetNV(client, CString(limit));
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+ else
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+ DelNV(client);
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+ }
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+
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+ static CBuffer GetLines(const CBuffer& buffer, double from, double to, int limit)
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+ {
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+ CBuffer lines(buffer.Size());
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+ for (size_t i = 0; i < buffer.Size(); ++i) {
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+ const CBufLine& line = buffer.GetBufLine(i);
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+ timeval tv = UniversalTime(line.GetTime());
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+ if (from < Timestamp(tv) && to >= Timestamp(tv))
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+ lines.AddLine(line.GetFormat(), line.GetText(), &tv);
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+ }
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+ if (limit > 0)
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+ lines.SetLineCount(limit);
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+ return lines;
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+ }
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+
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+ bool m_play;
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+};
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+
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+GLOBALMODULEDEFS(CPlaybackMod, "An advanced playback module for ZNC")
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