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387 lines
8.7 KiB
C
387 lines
8.7 KiB
C
#include "inbox.h"
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// Submodules
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#include "http/server/request.h"
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#include "json/json.h"
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#include "ffdb/fs_list.h"
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// Model
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#include "model/server.h"
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#include "model/status.h"
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#include "model/account.h"
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#include "model/notification.h"
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#include "model/ap/activity.h"
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#include "model/ap/account.h"
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#include "model/ap/inbox_envelope.h"
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#include "model/crypto/http_sign.h"
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//#include "model/timeline.h"
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// Stdlib
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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extern bool terminate;
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bool route_inbox( struct http_request* req )
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{
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// No subroutes
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if( !http_request_route_term( req, "" ) ) { return false; }
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if( !http_request_route_method( req, "POST" ) ) { return false; }
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if( envelope_create_from_request( req ) ) {
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http_request_send_headers( req, 200, "text/plain", true );
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} else {
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http_request_send_headers( req, 400, "text/plain", true );
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}
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return true;
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}
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static bool route_follow( struct ap_activity* act )
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{
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struct account* follower = NULL;
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bool res = false;
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struct ap_activity* accept = NULL;
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const char* target = act->object.ref;
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struct account* a = account_from_uri( target );
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// Don't process follows for remote users
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if( !a || 0 != strcmp( a->server, g_server_name ) ) {
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printf( "Unfollow not targeted at local account. Discarding.\n" );
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goto success;
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}
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// Get account for the follower
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follower = account_from_uri( act->actor );
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if( !follower ) {
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follower = account_fetch_from_uri( act->actor );
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}
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if( !follower ) {
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printf( "Unable to fetch account for %s\n", act->actor );
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goto failed;
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}
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// Add the follower
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account_add_follower( a, follower );
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// Create Accept activity
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ap_activity_accept( act, follower->id );
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success:
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res = true;
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cleanup:
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account_free(a);
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account_free(follower);
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return res;
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failed:
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res = false;
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goto cleanup;
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}
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static bool route_undo_activity( struct ap_activity* act )
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{
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if( act->object.tag != apaot_activity ) {
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printf( "Can't undo reference activities, discarding...\n" );
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return true;
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}
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if( !act->object.ptr ) {
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printf( "No object in activity\n" );
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return false;
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}
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switch( act->object.ptr->type ) {
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case apat_follow: return route_undo_follow( act );
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default:
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printf( "Unhandled object activity type %d in undo\n", act->object.ptr->type );
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return false;
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};
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return false;
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}
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static struct status* lookup_object_status( struct ap_activity* act )
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{
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struct status* s = NULL;
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switch( act->object.tag ) {
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case apaot_ref:
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s = status_from_uri( act->object.ref );
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if( !s ) {
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s = status_fetch_from_uri( act->object.ref );
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}
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break;
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case apaot_activity:
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s = status_from_uri( act->object.ptr->id );
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if( !s ) {
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s = status_from_activity( act->object.ptr );
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status_save_new( s );
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}
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break;
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}
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if( s ) { return s; }
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switch( act->object.tag ) {
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case apaot_ref:
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printf( "! Status %s doesn't exist locally (object.ref)\n", act->object.ref );
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break;
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case apaot_activity:
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printf( "! Status %s doesn't exist locally (object.ptr)\n", act->object.ptr->id );
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break;
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}
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return NULL;
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}
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static struct account* lookup_actor_account( struct ap_activity* act )
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{
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struct account* a = account_from_uri( act->actor );
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if( a ) { return a; }
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a = account_fetch_from_uri( act->actor );
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return a;
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}
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static bool route_like( struct ap_activity* act )
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{
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struct status* s = lookup_object_status(act);
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struct account* liker = lookup_actor_account(act);
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if( !s ) {
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return false;
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};
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status_add_like( s, liker );
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return true;
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}
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static bool route_emoji_react( struct ap_activity* act )
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{
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struct status* s = lookup_object_status(act);
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struct account* reactor = lookup_actor_account(act);
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if( !s || !reactor ) { return false; }
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status_add_react( s, act->content.content, reactor );
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return true;
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}
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static bool route_create( struct ap_activity* act )
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{
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struct status* s = NULL;
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bool result = false;
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// Requires an object
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// TODO: if there is a ref here, fetch the object
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if( act->object.tag != apaot_activity ) { return false; }
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struct ap_activity* obj = act->object.ptr;
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bool mentions_me = false;
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bool follows_me = false;
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// Does this activity have mention me
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char owner_url[512];
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snprintf( owner_url, sizeof(owner_url), "https://%s/owner/actor", g_server_name );
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for( int i = 0; i < obj->tags.count; ++i ) {
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struct ap_activity_tag* tag = obj->tags.items[i];
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//printf( "tag = { &=%p, .type=%d, .href=%s, .name=%s }\n", tag, tag->type, tag->href, tag->name );
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if( tag->type != aptag_mention ) { continue; }
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if( 0 == strcmp(tag->href, owner_url) ) {
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mentions_me = true;
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goto check_is_follower;
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}
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}
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check_is_follower:
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// Get actor account
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struct account* actor_account = account_from_uri_or_fetch( obj->actor );
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if( !actor_account ) {
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printf( "! Unable to fetch %s\n", obj->actor );
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goto failed;
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}
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if( account_does_follow( actor_account, owner_account_id ) ) {
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follows_me = true;
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}
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if( !follows_me && !mentions_me ) {
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// Discard without action
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result = true;
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goto cleanup;
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}
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// Create local status
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s = status_from_uri( obj->id );
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if( !s ) {
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s = status_from_activity(obj);
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status_save_new(s);
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}
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// Add to timelines
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if( follows_me ) {
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status_add_to_timeline( s, home_timeline_id );
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// TODO: create notification if user notifications are on or this is part of a watched conversation
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}
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if( mentions_me ) {
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// Create notification
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struct notification* note = notification_new();
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note->type = nt_mention;
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note->status_id = s->id;
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note->account_id = actor_account->id;
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notification_save( note );
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notification_free( note );
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}
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// Add to standard timelines
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status_add_to_timeline( s, public_timeline_id );
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//status_add_to_timeline( s, federated_timeline_id );
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status_add_to_timeline( s, actor_account->id );
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result = true;
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cleanup:
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account_free(actor_account);
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status_free(s);
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return result;
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failed:
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result = false;
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goto cleanup;
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}
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static bool route_accept( struct ap_activity* act )
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{
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// TODO: actually handle accepts
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// In particular, this needs to change a follow request to a following accepted
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return true;
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}
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bool route_activity( struct ap_activity* act )
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{
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printf( "Handling %s\n", act->id );
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ap_activity_write_to_FILE( act, stdout );
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switch( act->type ) {
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case apat_undo: return route_undo_activity(act);
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case apat_follow: return route_follow(act);
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case apat_like: return route_like(act);
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case apat_create: return route_create(act);
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case apat_accept: return route_accept(act);
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case apat_announce: return route_announce(act);
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case apat_add: return route_add(act);
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case apat_emoji_react: return route_emoji_react(act);
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default:
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printf( "Unhandled activity type: %d\n", act->type );
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}
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return false;
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}
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static bool process_one()
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{
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// Items requiring cleanup
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struct ap_activity* act = NULL;
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struct ap_envelope* env = NULL;
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bool result = false;
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int tail_pos = fs_list_get("data/inbox/TAIL");
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int head_pos = fs_list_get("data/inbox/HEAD");
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if( head_pos <= tail_pos ) { return false; }
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// We have data to process
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printf( "Inbox has %d items pending processing...\n", (head_pos - tail_pos) );
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int id = tail_pos + 1;
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env = ap_envelope_from_id(id);
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bool step_tail = false;
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if( !env ) {
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printf( "Failed to parse envelope+activity for data/inbox/%d.json\n", id );
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return false;
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}
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// Load activity
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FILE* f = fmemopen( env->body, strlen(env->body), "r" );
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act = ap_activity_from_FILE(f);
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if( !act ) { goto failed; }
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// Discard delete requests
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if( act->type == apat_delete ) {
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step_tail = true;
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goto discard;
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}
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// Validate signature
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env->validated = http_signature_validate( env, "post /inbox" );
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if( !env->validated ) { goto failed; }
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printf( "Processing %d\n", id );
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step_tail = route_activity( act );
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finished:
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printf( "step_tail=%c\n", step_tail ? 'T' : 'F' );
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if( step_tail ) {
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fs_list_set( "data/inbox/TAIL", id );
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result = true;
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}
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ap_activity_free(act);
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ap_envelope_free(env);
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printf( "result=%c\n", result ? 'T' : 'F' );
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return result;
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failed:
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result = false;
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goto finished;
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discard:
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result = true;
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goto finished;
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}
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static bool cleanup_inbox()
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{
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int tail_pos = fs_list_get("data/inbox/TAIL");
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int dead_pos = fs_list_get("data/inbox/DEAD");
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if( dead_pos < tail_pos ) {
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char filename[512];
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snprintf( filename, 512, "data/inbox/%d.json", dead_pos + 1 );
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FILE* f = fopen( filename, "r" );
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if( f ) {
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fclose(f);
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if( 0 == remove(filename) ) {
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// File successfully remove, advance
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fs_list_set( "data/inbox/DEAD", dead_pos + 1 );
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return true;
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}
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} else {
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// File already doesn't exist, advance
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fclose(f);
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fs_list_set( "data/inbox/DEAD", dead_pos + 1 );
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return true;
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}
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}
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return false;
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}
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void process_inbox()
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{
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while( !terminate ) {
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bool activity = false;
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activity |= process_one();
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activity |= cleanup_inbox();
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if( !activity ) {
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fflush(stdout);
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sleep(1);
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}
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}
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}
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