Refactor torrent selection state management

Now reduxified and more consistent

src/actions/selection.js

@@ -0,0 +1,74 @@
+import { filter_subscribe, filter_unsubscribe } from './filter_subscribe';
+import { unsubscribe } from './subscribe';
+import { push } from 'react-router-redux';
+
+export const UNION = 'UNION';
+export const SUBTRACT = 'SUBTRACT';
+export const EXCLUSIVE = 'EXCLUSIVE';
+
+Set.prototype.difference = function(set) {
+  var diff = new Set(this);
+  for (var v of set) {
+    diff.delete(v);
+  }
+  return diff;
+}
+
+export default function selectTorrent(id, action) {
+  return (dispatch, getState) => {
+    const previous = new Set(getState().selection);
+    dispatch({ type: action, id });
+
+    const state = getState();
+    const next = new Set(state.selection);
+    const filter_subscriptions = state.filter_subscribe;
+    const subscriptions = state.subscribe;
+    const { peers, files, pieces, trackers } = state;
+
+    const added = next.difference(previous);
+    const removed = previous.difference(next);
+
+    added.forEach(t => {
+      const criteria = [
+        { field: "torrent_id", op: "==", value: id }
+      ];
+      dispatch(filter_subscribe("peer", criteria));
+      dispatch(filter_subscribe("file", criteria));
+      dispatch(filter_subscribe("piece", criteria));
+      dispatch(filter_subscribe("tracker", criteria));
+    });
+
+    removed.forEach(t => {
+      /* Remove filter subscriptions */
+      const serials = filter_subscriptions
+        .filter(sub => sub.criteria[0] && sub.criteria[0].value === t)
+        .map(sub => sub.serial);
+      serials.forEach(serial => dispatch(filter_unsubscribe(serial)));
+      /* Remove resource subscriptions */
+      const ids = [
+        ...Object.values(files)
+          .filter(file => file.torrent_id === t)
+          .map(file => file.id)
+        //...Object.values(peers)
+        //  .filter(peer => peer.torrent_id === t)
+        //  .map(peer => peer.id),
+        //...Object.values(trackers)
+        //  .filter(tracker => tracker.torrent_id === t)
+        //  .map(tracker => tracker.id),
+        //...Object.values(pieces)
+        //  .filter(piece => piece.torrent_id === t)
+        //  .map(piece => piece.id),
+      ];
+      if (ids.length > 0) {
+        dispatch(unsubscribe(...ids));
+      }
+    });
+
+    const url_torrents = state.selection.slice(0, 3);
+    if (url_torrents.length > 0) {
+      dispatch(push(`/torrents/${url_torrents}`));
+    } else {
+      dispatch(push("/"));
+    }
+  };
+}

src/reducers/filter_subscribe.js

@@ -17,8 +17,8 @@ export default function filter_subscribe(state = [], action) {
       ];
     }
     case FILTER_UNSUBSCRIBE: {
-      const { _serial } = action;
+      const { serial } = action;
-      return state.filter(({ serial }) => serial !== _serial);
+      return state.filter(filter => filter.serial !== serial);
     }
   }
   return state;

src/reducers/index.js

@@ -1,5 +1,6 @@
 import { combineReducers } from 'redux';
 import { routerReducer } from 'react-router-redux'
+import selection from './selection';
 import subscribe from './subscribe';
 import filter_subscribe from './filter_subscribe';
 import server from './server';
@@ -7,6 +8,7 @@ import torrents from './torrents';
 import files from './files';
 
 const root = combineReducers({
+  selection,
   subscribe,
   filter_subscribe,
   server,

src/reducers/selection.js

@@ -0,0 +1,14 @@
+import { UNION, SUBTRACT, EXCLUSIVE } from '../actions/selection';
+
+export default function selection(state = [], action) {
+  const { id } = action;
+  switch (action.type) {
+    case UNION:
+      return [id, ...state.filter(t => t !== id)];
+    case SUBTRACT:
+      return state.filter(t => t !== id);
+    case EXCLUSIVE:
+      return [id];
+  }
+  return state;
+}

src/torrent_state.js

@@ -1,71 +0,0 @@
-import { filter_subscribe, filter_unsubscribe } from './actions/filter_subscribe';
-import { push } from 'react-router-redux';
-/* Listen pal, we're just gonna pretend this import isn't happening */
-import { dispatch, getState } from './store';
-
-export function activeTorrents() {
-  const { pathname } = getState().router.location;
-  if (pathname.indexOf("/torrents/") !== 0) {
-    return [];
-  } else {
-    return pathname.slice("/torrents/".length).split(",");
-  }
-}
-
-export function updateSubscriptions(added, removed) {
-  if (added.length > 0) {
-    added.forEach(t => {
-      const criteria = [
-        { field: "torrent_id", op: "==", value: t }
-      ];
-      dispatch(filter_subscribe("peer", criteria));
-      dispatch(filter_subscribe("file", criteria));
-      dispatch(filter_subscribe("piece", criteria));
-      dispatch(filter_subscribe("tracker", criteria));
-    });
-  }
-  if (removed.length > 0) {
-    const subscriptions = getState().filter_subscribe;
-    removed.forEach(t => {
-      const serials = subscriptions
-        .filter(sub => sub.criteria[0] && sub.criteria[0].value == t)
-        .map(sub => sub.serial);
-      serials.forEach(serial => dispatch(filter_unsubscribe(serial)));
-    });
-  }
-}
-
-export const selectop = {
-  EXCLUSIVE: 1,
-  UNION: 2,
-  SUBTRACT: 3
-};
-
-export function selectTorrent(t, action = UNION) {
-  let active = activeTorrents(getState().router);
-  let removed = [], added = [];
-  switch (action) {
-    case selectop.EXCLUSIVE:
-      removed = active.slice();
-      active = [t.id];
-      added = [t.id];
-      break;
-    case selectop.UNION:
-      if (active.indexOf(t.id) === -1) {
-        active = [...active, t.id];
-        added = [t.id];
-      }
-      break;
-    case selectop.SUBTRACT:
-      if (active.indexOf(t.id) !== -1) {
-        removed = [t.id];
-        active = active.filter(a => a != t.id);
-      }
-      break;
-  }
-  const url = active.length === 0 ? "/" : `/torrents/${active.join(',')}`;
-  if (url !== getState().router.location) {
-    dispatch(push(url));
-  }
-  updateSubscriptions(added, removed);
-}

src/ui/torrent_details.js

@@ -1,6 +1,5 @@
 import React, { Component } from 'react';
 import { connect } from 'react-redux';
-import { activeTorrents } from '../torrent_state';
 import FontAwesome from 'react-fontawesome';
 import {
   ButtonGroup,
@@ -153,10 +152,10 @@ class TorrentDetails extends Component {
     };
   }
 
-  renderHeader(active) {
+  renderHeader(selection) {
     return (
       <div>
-        <h3>{active.length} torrents</h3>
+        <h3>{selection.length} torrents</h3>
         <ButtonGroup>
           <button className="btn btn-default btn-sm">Pause all</button>
           <button className="btn btn-default btn-sm">Resume all</button>
@@ -178,16 +177,14 @@ class TorrentDetails extends Component {
   }
 
   render() {
-    const active = activeTorrents();
+    const { torrents, files, selection } = this.props;
-    const { torrents } = this.props;
-    const { files } = this.props;
     const _files = Object.values(files).reduce((s, f) => ({
       ...s, [f.torrent_id]: [...(s[f.torrent_id] || []), f]
     }), {});
     return (
       <div>
-        {active.length > 1 ? this.renderHeader(active) : null}
+        {selection.length > 1 ? this.renderHeader(selection) : null}
-        {active.map(id => <Torrent
+        {selection.map(id => <Torrent
           torrent={torrents[id]}
           files={_files[id] || []}
         />)}
@@ -199,5 +196,6 @@ class TorrentDetails extends Component {
 export default connect(state => ({
   router: state.router,
   torrents: state.torrents,
-  files: state.files
+  files: state.files,
+  selection: state.selection
 }))(TorrentDetails);

src/ui/torrent_table.js

@@ -1,12 +1,11 @@
 import React, { Component } from 'react';
 import { connect } from 'react-redux';
-import { activeTorrents, selectTorrent, selectop } from '../torrent_state';
+import selectTorrent, { UNION, SUBTRACT, EXCLUSIVE } from '../actions/selection';
 import { formatBitrate } from '../bitrate';
 
 class TorrentTable extends Component {
   render() {
-    const { torrents } = this.props;
+    const { selection, torrents, dispatch } = this.props;
-    const active = activeTorrents();
     return (
       <table className="table">
         <thead>
@@ -25,7 +24,7 @@ class TorrentTable extends Component {
               className={`torrent progress-row ${
                 t.status
               } ${
-                active.indexOf(t.id) !== -1 ? "selected" : ""
+                selection.indexOf(t.id) !== -1 ? "selected" : ""
               }`}
               style={{
                 backgroundSize: `${t.progress * 100}% 3px`
@@ -34,22 +33,20 @@ class TorrentTable extends Component {
               <td>
                 <input
                   type="checkbox"
-                  checked={active.indexOf(t.id) !== -1}
+                  checked={selection.indexOf(t.id) !== -1}
                   onChange={e =>
-                    selectTorrent(t,
+                    dispatch(selectTorrent(t.id, e.target.checked ? UNION : SUBTRACT))
-                      e.target.checked ? selectop.UNION : selectop.SUBTRACT)}
+                  }
                 />
               </td>
               <td>
                 <a
-                  href="#"
+                  href={`/torrents/${t.id}`}
                   onClick={e => {
                     e.preventDefault();
-                    selectTorrent(t, selectop.EXCLUSIVE);
+                    dispatch(selectTorrent(t.id, EXCLUSIVE));
                   }}
-                >
+                >{t.name}</a>
-                  {t.name}
-                </a>
               </td>
               <td>{formatBitrate(t.rate_up)}</td>
               <td>{formatBitrate(t.rate_down)}</td>
@@ -64,5 +61,6 @@ class TorrentTable extends Component {
 
 export default connect(state => ({
   torrents: state.torrents,
+  selection: state.selection,
   router: state.router
 }))(TorrentTable);