cover photo for groups, #2588

public/language/en_GB/groups.json

@@ -5,6 +5,11 @@
 	"new_group": "Create New Group",
 	"no_groups_found": "There are no groups to see",
 
+	"cover-instructions": "Drag and Drop a photo, drag to position, and hit <strong>Save</strong>",
+	"cover-change": "Change",
+	"cover-save": "Save",
+	"cover-saving": "Saving",
+
 	"details.title": "Group Details",
 	"details.members": "Member List",
 	"details.pending": "Pending Members",

public/src/client/groups/details.js

@@ -1,14 +1,17 @@
 "use strict";
-/* globals define, socket, ajaxify, app, bootbox */
+/* globals define, socket, ajaxify, app, bootbox, RELATIVE_PATH */
 
-define('forum/groups/details', ['iconSelect', 'vendor/colorpicker/colorpicker'], function(iconSelect) {
+define('forum/groups/details', ['iconSelect', 'vendor/colorpicker/colorpicker', 'vendor/jquery/draggable-background/backgroundDraggable'], function(iconSelect) {
-	var Details = {};
+	var Details = {
+			cover: {}
+		};
 
 	Details.init = function() {
 		var detailsPage = $('.groups'),
 			settingsFormEl = detailsPage.find('form');
 
 		Details.prepareSettings();
+		Details.initialiseCover();
 
 		$('.latest-posts .content img').addClass('img-responsive');
 
@@ -150,5 +153,87 @@ define('forum/groups/details', ['iconSelect', 'vendor/colorpicker/colorpicker'],
 		});
 	};
 
+	Details.initialiseCover = function() {
+		var coverEl = $('.group-cover');
+		coverEl.find('.change').on('click', function() {
+			coverEl.toggleClass('active', 1);
+			coverEl.backgroundDraggable();
+			coverEl.on('dragover', Details.cover.onDragOver);
+			coverEl.on('drop', Details.cover.onDrop);
+		});
+
+		coverEl.find('.save').on('click', Details.cover.save);
+	};
+
+	// Cover Photo Handling Code
+
+	Details.cover.load = function() {
+		socket.emit('groups.cover.get', function(err, data) {
+			if (!err) {
+				var coverEl = $('.group-cover');
+				if (data['cover:url']) {
+					coverEl.css('background-image', 'url(' + RELATIVE_PATH + '/theme-rocket/cover/' + data['cover:url'] + ')');
+				}
+
+				if (data['cover:position']) {
+					coverEl.css('background-position', data['cover:position']);
+				}
+
+				delete Details.cover.newCover;
+			} else {
+				app.alertError(err.message);
+			}
+		});
+	};
+
+	Details.cover.onDragOver = function(e) {
+		e.stopPropagation();
+		e.preventDefault();
+		e.originalEvent.dataTransfer.dropEffect = 'copy';
+	};
+
+	Details.cover.onDrop = function(e) {
+		var coverEl = $('.group-cover');
+		e.stopPropagation();
+		e.preventDefault();
+
+		var files = e.originalEvent.dataTransfer.files,
+		reader = new FileReader();
+
+		if (files.length && files[0].type.match('image.*')) {
+			reader.onload = function(e) {
+				coverEl.css('background-image', 'url(' + e.target.result + ')');
+				coverEl.backgroundDraggable();
+				Details.cover.newCover = e.target.result;
+			};
+
+			reader.readAsDataURL(files[0]);
+		}
+	};
+
+	Details.cover.save = function() {
+		var coverEl = $('.group-cover');
+
+		coverEl.addClass('saving');
+
+		socket.emit('groups.cover.update', {
+			groupName: ajaxify.variables.get('group_name'),
+			imageData: Details.cover.newCover || undefined,
+			position: $('.group-cover').css('background-position')
+		}, function(err) {
+			if (!err) {
+				coverEl.toggleClass('active', 0);
+				coverEl.backgroundDraggable('disable');
+				coverEl.off('dragover', Details.cover.onDragOver);
+				coverEl.off('drop', Details.cover.onDrop);
+				Details.cover.load();
+			} else {
+				app.alertError(err.message);
+			}
+
+			coverEl.removeClass('saving');
+		});
+	};
+
 	return Details;
 });

public/vendor/jquery/draggable-background/backgroundDraggable.js

@@ -0,0 +1,157 @@
+/**
+ * Draggable Background plugin for jQuery
+ *
+ * v1.2.4
+ *
+ * Copyright (c) 2014 Kenneth Chung
+ *
+ * Licensed under the MIT license:
+ *   http://www.opensource.org/licenses/mit-license.php
+ */
+;(function($) {
+  var $window = $(window);
+
+  // Helper function to guarantee a value between low and hi unless bool is false
+  var limit = function(low, hi, value, bool) {
+    if (arguments.length === 3 || bool) {
+      if (value < low) return low;
+      if (value > hi) return hi;
+    }
+    return value;
+  };
+
+  // Adds clientX and clientY properties to the jQuery's event object from touch
+  var modifyEventForTouch = function(e) {
+    e.clientX = e.originalEvent.touches[0].clientX;
+    e.clientY = e.originalEvent.touches[0].clientY;
+  };
+
+  var getBackgroundImageDimensions = function($el) {
+    var bgSrc = ($el.css('background-image').match(/^url\(['"]?(.*?)['"]?\)$/i) || [])[1];
+    if (!bgSrc) return;
+
+    var imageDimensions = { width: 0, height: 0 },
+        image = new Image();
+
+    image.onload = function() {
+      if ($el.css('background-size') == "cover") {
+        var elementWidth = $el.innerWidth(),
+            elementHeight = $el.innerHeight(),
+            elementAspectRatio = elementWidth / elementHeight;
+            imageAspectRatio = image.width / image.height,
+            scale = 1;
+
+        if (imageAspectRatio >= elementAspectRatio) {
+          scale = elementHeight / image.height;
+        } else {
+          scale = elementWidth / image.width;
+        }
+
+        imageDimensions.width = image.width * scale;
+        imageDimensions.height = image.height * scale;
+      } else {
+        imageDimensions.width = image.width;
+        imageDimensions.height = image.height;
+      }
+    };
+
+    image.src = bgSrc;
+
+    return imageDimensions;
+  };
+
+  function Plugin(element, options) {
+    this.element = element;
+    this.options = options;
+    this.init();
+  }
+
+  Plugin.prototype.init = function() {
+    var $el = $(this.element),
+        bgSrc = ($el.css('background-image').match(/^url\(['"]?(.*?)['"]?\)$/i) || [])[1],
+        options = this.options;
+
+    if (!bgSrc) return;
+
+    // Get the image's width and height if bound
+    var imageDimensions = { width: 0, height: 0 };
+    if (options.bound) {
+      imageDimensions = getBackgroundImageDimensions($el);
+    }
+
+    $el.on('mousedown.dbg touchstart.dbg', function(e) {
+      if (e.target !== $el[0]) {
+        return;
+      }
+      e.preventDefault();
+
+      if (e.originalEvent.touches) {
+        modifyEventForTouch(e);
+      } else if (e.which !== 1) {
+        return;
+      }
+
+      var x0 = e.clientX,
+          y0 = e.clientY,
+          pos = $el.css('background-position').match(/(-?\d+).*?\s(-?\d+)/) || [],
+          xPos = parseInt(pos[1]) || 0,
+          yPos = parseInt(pos[2]) || 0;
+
+      $window.on('mousemove.dbg touchmove.dbg', function(e) {
+        e.preventDefault();
+
+        if (e.originalEvent.touches) {
+          modifyEventForTouch(e);
+        }
+
+        var x = e.clientX,
+            y = e.clientY;
+
+        xPos = options.axis === 'y' ? xPos : limit($el.innerWidth()-imageDimensions.width, 0, xPos+x-x0, options.bound);
+        yPos = options.axis === 'x' ? yPos : limit($el.innerHeight()-imageDimensions.height, 0, yPos+y-y0, options.bound);
+        x0 = x;
+        y0 = y;
+
+        $el.css('background-position', xPos + 'px ' + yPos + 'px');
+      });
+
+      $window.on('mouseup.dbg touchend.dbg mouseleave.dbg', function() {
+        if (options.done) {
+          options.done();
+        }
+
+        $window.off('mousemove.dbg touchmove.dbg');
+        $window.off('mouseup.dbg touchend.dbg mouseleave.dbg');
+      });
+    });
+  };
+
+  Plugin.prototype.disable = function() {
+    var $el = $(this.element);
+    $el.off('mousedown.dbg touchstart.dbg');
+    $window.off('mousemove.dbg touchmove.dbg mouseup.dbg touchend.dbg mouseleave.dbg');
+  }
+
+  $.fn.backgroundDraggable = function(options) {
+    var options = options;
+    var args = Array.prototype.slice.call(arguments, 1);
+
+    return this.each(function() {
+      var $this = $(this);
+
+      if (typeof options == 'undefined' || typeof options == 'object') {
+        options = $.extend({}, $.fn.backgroundDraggable.defaults, options);
+        var plugin = new Plugin(this, options);
+        $this.data('dbg', plugin);
+      } else if (typeof options == 'string' && $this.data('dbg')) {
+        var plugin = $this.data('dbg');
+        Plugin.prototype[options].apply(plugin, args);
+      }
+    });
+  };
+
+  $.fn.backgroundDraggable.defaults = {
+    bound: true,
+    axis: undefined
+  };
+}(jQuery));

src/controllers/uploads.js

@@ -72,6 +72,10 @@ uploadsController.uploadThumb = function(req, res, next) {
 	}, next);
 };
 
+uploadsController.uploadGroupCover = function(data, next) {
+	uploadImage(0/*req.user.uid*/, data, next);
+};
+
 function uploadImage(uid, image, callback) {
 	if (plugins.hasListeners('filter:uploadImage')) {
 		return plugins.fireHook('filter:uploadImage', {image: image, uid: uid}, callback);

src/groups.js

@@ -3,14 +3,20 @@
 var async = require('async'),
 	winston = require('winston'),
 	_ = require('underscore'),
+	crypto = require('crypto'),
+	path = require('path'),
+	nconf = require('nconf'),
+	fs = require('fs'),
+
 	user = require('./user'),
 	meta = require('./meta'),
 	db = require('./database'),
 	plugins = require('./plugins'),
 	posts = require('./posts'),
 	privileges = require('./privileges'),
-	utils = require('../public/src/utils');
+	utils = require('../public/src/utils'),
 
+	uploadsController = require('./controllers/uploads');
 
 (function(Groups) {
 
@@ -60,7 +66,12 @@ var async = require('async'),
 				}
 
 				return groups;
+			}/*,
+			fixImageUrl: function(url) {
+				if (url) {
+					return url.indexOf('http') === -1 ? nconf.get('relative_path') + url : url;
 				}
+			}*/
 		};
 
 	Groups.list = function(options, callback) {
@@ -185,6 +196,7 @@ var async = require('async'),
 				return callback(err);
 			}
 
+			// results.base.image = internals.fixImageUrl(results.base.image);
 			results.base.members = results.users.filter(Boolean);
 			results.base.pending = results.pending.filter(Boolean);
 			results.base.count = numUsers || results.base.members.length;
@@ -203,6 +215,15 @@ var async = require('async'),
 		});
 	};
 
+	Groups.getGroupFields = function(groupName, fields, callback) {
+		db.getObjectFields('group:' + groupName, fields, callback);
+	};
+
+	Groups.setGroupField = function(groupName, field, value, callback) {
+		plugins.fireHook('action:group.set', {field: field, value: value, type: 'set'});
+		db.setObjectField('group:' + groupName, field, value, callback);
+	};
+
 	Groups.isPrivate = function(groupName, callback) {
 		db.getObjectField('group:' + groupName, 'private', function(err, isPrivate) {
 			isPrivate = isPrivate || isPrivate === null;
@@ -688,6 +709,63 @@ var async = require('async'),
 		});
 	};
 
+	Groups.updateCoverPosition = function(groupName, position, callback) {
+		Groups.setGroupField(groupName, 'cover:position', position, callback);
+	};
+
+	Groups.updateCover = function(data, callback) {
+		var tempPath, md5sum, url;
+
+		// Position only? That's fine
+		if (!data.imageData && data.position) {
+			return Groups.updateCoverPosition(data.groupName, data.position, callback);
+		}
+
+		async.series([
+			function(next) {
+				// Calculate md5sum of image
+				// This is required because user data can be private
+				md5sum = crypto.createHash('md5');
+				md5sum.update(data.imageData);
+				md5sum = md5sum.digest('hex');
+				next();
+			},
+			function(next) {
+				// Save image
+				tempPath = path.join(nconf.get('base_dir'), nconf.get('upload_path'), md5sum);
+				var buffer = new Buffer(data.imageData.slice(data.imageData.indexOf('base64') + 7), 'base64');
+
+				fs.writeFile(tempPath, buffer, {
+					encoding: 'base64'
+				}, next);
+			},
+			function(next) {
+				uploadsController.uploadGroupCover({
+					path: tempPath
+				}, function(err, uploadData) {
+					if (err) {
+						return next(err);
+					}
+
+					url = uploadData.url;
+					next();
+				});
+			},
+			function(next) {
+				Groups.setGroupField(data.groupName, 'cover:url', url, next);
+			},
+			function(next) {
+				fs.unlink(tempPath, next);	// Delete temporary file
+			}
+		], function(err) {
+			if (err) {
+				return callback(err);
+			}
+
+			Groups.updateCoverPosition(data.groupName, data.position, callback);
+		});
+	}
+
 	Groups.ownership = {};
 
 	Groups.ownership.isOwner = function(uid, groupName, callback) {

src/socket.io/groups.js

@@ -126,4 +126,26 @@ SocketGroups.delete = function(socket, data, callback) {
 	});
 };
 
+SocketGroups.cover = {};
+
+SocketGroups.cover.get = function(socket, data, callback) {
+	groups.getGroupFields(data.groupName, ['cover:url', 'cover:position'], callback);
+};
+
+SocketGroups.cover.update = function(socket, data, callback) {
+	if(!data) {
+		return callback(new Error('[[error:invalid-data]]'));
+	} else if (socket.uid === 0) {
+		return callback(new Error('[[error:no-privileges]]'));
+	}
+
+	groups.ownership.isOwner(socket.uid, data.groupName, function(err, isOwner) {
+		if (!isOwner) {
+			return callback(new Error('[[error:no-privileges]]'));
+		}
+
+		groups.updateCover(data, callback);
+	});
+};
+
 module.exports = SocketGroups;