making random placement api more general

1 files changed, 34 insertions, 17 deletions

diff --git a/public/assets/javascripts/rectangles/engine/scenery/randomize.js b/public/assets/javascripts/rectangles/engine/scenery/randomize.js
index 82b6bf9..1c8ec4f 100644
--- a/public/assets/javascripts/rectangles/engine/scenery/randomize.js
+++ b/public/assets/javascripts/rectangles/engine/scenery/randomize.js
@@ -1,13 +1,17 @@
 /*
   // get the list of media we want to place
-  var media_data = $(".mediaContainer").toArray().map(function(el){
+  var media_objs = $(".mediaContainer").toArray().map(function(el){
     return $(el).data("media")
   })
-  Scenery.randomize( media_data )
+  var walls = []
+  Scenery.randomize.add( media_objs, walls )
 */
 
-Scenery.randomize = function (media_data) {
-  var media_list = media_data.map(function(media){
+Scenery.randomize = {};
+
+// Given a list of media objects, generate their ideal dimensions
+Scenery.randomize.get_dimensions = function (media_objs){
+  var media_list = media_objs.map(function(media){
     var width, height
     if (media.width > media.height) {
       width = Math.min(DEFAULT_PICTURE_WIDTH, media.width)
@@ -22,37 +26,50 @@ Scenery.randomize = function (media_data) {
       media: media,
     }
   })
+  return media_list
+}
 
+// Build the lookup of empty walls.
+// Takes a list of walls to use, or undefined to use all empty walls.
+// Returns a lookup of walls to use, keyed by wall ID.
+Scenery.randomize.get_empty_walls = function(wall_list){
   // get a list of all walls
   var walls = {}
-  Walls.forEach(function(wall){
+  (wall_list || Walls).forEach(function(wall){
     walls[wall.id] = wall
   })
 
   // remove the walls that already have stuff on them
-  Scenery.forEach(function(scenery){
-    delete walls[scenery.wall.id] 
-  })
+  if (! wall_list) {
+    Scenery.forEach(function(scenery){
+      delete walls[scenery.wall.id] 
+    })
+  }
+  
+  return walls
+}
 
+// Randomly place a set of media objects on empty walls.
+// Only one object per wall will be added.
+Scenery.randomize.add = function (media_objs, wall_list) {
+  var media_list = Scenery.randomize.get_dimensions(media_objs)
+  var walls = Scenery.randomize.get_empty_walls(wall_list)
+  
   var wall_ids = _.keys(walls)
-  if (! wall_ids.length) {
-    return
-  }
+  if (! wall_ids.length) { return }
 
   // randomize walls
   shuffle(wall_ids)
 
   // assign each of the media to the walls, until we run out of either
-  media_list.some(function(media){
-    if (wall_ids.length == 0) {
-      return true
-    }
+  media_list.all(function(media){
+    // bail if we're out of walls
+    if (wall_ids.length == 0) { return false }
   
     var i, fits = -1
 
     for (i = 0; i < wall_ids.length; i++) {
       if (walls[wall_ids[i]].surface.fits(media.dimensions)) {
-        // walls[wall_ids[i]]
         fits = i
         break
       }
@@ -72,6 +89,6 @@ Scenery.randomize = function (media_data) {
       // artwork won't fit anywhere??
     }
   
-    return false
+    return true
   })
 }
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