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--- public:tellmaps_url_and_seo [2014/04/25 13:15]
honzik [Path component]
+++ public:tellmaps_url_and_seo [2014/05/05 07:27] (current)
honzik
@@ Line 21: / Line 21: @@
   * a **local hash**, ''#local-hash'' - this is used as a normal hash, i.e. to scroll to a given part of document (top / bottom etc).
-[Implementation] code to retriveve params from hash part: https://gist.github.com/miohtama/1570295
+[Implementation details] code to retriveve params from hash part: https://gist.github.com/miohtama/1570295
 ===== URLs for Tellmaps =====
@@ Line 48: / Line 48: @@
 Advantages of param set over path set (such as ''/tellmap/WDAWORLD01/date/1974/focus/BRA/cartogram/true''):
-  * params are simpler to parse / assemble
+  * params are simpler to parse / assemble, it's much harder to make a mistake as would be in the above if we remove one part of component, such as ''date''
   * we can distinguish between what is a path to resource, and what is only a different way to display it
@@ Line 58: / Line 58: @@
 ===== Javascript implementation =====
-The main idea is to create a Javascript service which can be called from existing system modules to perform URL-based operations. We shall call it ''TellmapsURIService''.
-API should provide:
 <code javascript>
 /**
- * Register a given path.
+ * revised version with one settings object and multiple callback definitions
- * @param uri_string string with path. May contain variables in the format of '':variable'' - will be passed to callback on request.
+ * @param settings - collection {}, specify these properties:
- * @param callback - a function in the form of function(passed_vars, get_vars, path_not_changed)
+ *  - path - string - define a path component with possible :variable notation
- *   passed_vars is a collection of { variable_name: variable_value }
+ *  - onPathSet - function(variables) - pass in a callback to be called whenever a path changes
- *   get_vars is a collection of param set (GET) in form of { param_name: param_value } with automatic completion from default_params_object
+ *                    - @param variables - collection of passed :variable values
- *   path_not_changed is true if path component changed from last state, false if only params / local hash changed
+ *                        in format { variable_name: variable_value }
- *   function will be called whenever URI matches on URI change
+ *  - onPathOut - function() - pass in a callback to as destructor function
- * @param default_params_object - contains default GET values in form of { param_name: param_def_value }
+ *              - is called whenever path components change from this path
+ *  - onParamsChange - function(params) - pass in a callback to be called whenever a param string changes
+ *                     - @param params - collections of passed GET params
+ *                         in format { param_name: param_value }
+ *  - defaultParams - collection - define an array of default GET values - they automatically pre-fill the
+ *                   params in onParamsChange callback if not provided from GET
+ *  - onHashChange - function(local_hash) - pass in a callback to be called whenever a local hash part changes
+ *                     - @param local_hash - provides new value of local_hash
+ *     - @default if not defined, will perform a scroll to page top / element of ID #local_hash,
+ *                as standard hash does
+ *  - debug - boolean - provide console.log outputs on various operations of this registerURI block
  * @return none
+ *
+ * notes:
+ *  - all callbacks have "this" set which can access the following:
+ *    getHash(), getParams(), getParamString(), getPath()
+ *    please do not use their "set" counterparts directly.
  **/
-function registerURI( uri_string, callback, default_params_object ) {
+function registerUri( settings ) {
 ...
@@ Line 86: / Line 97: @@
  *   function will be called on URI parse failed
  * @return none
+ *
+ * notes:
+ *  - callback has "this" set which can access the following:
+ *    getHash(), getParams(), getParamString(), getPath()
+ *    please do not use their "set" counterparts directly.
  **/
-function onURIFail( callback ) {
+function onUriFail( callback ) {
 ...
 /**
- * Manual call to path change
+ * Get proper URI string to be used in parts of the app
  * @param path - string, path component part
  * @param get_params - get param collection in the form of { param_name : param_value }
  * @param local_hash - string, local hash part
- * @return true/false on success / fail
+ * @return string final string
  **/
-function changeURI( path, get_params, local_hash ) {
+function getUriString( path, get_params, local_hash ) {
 ...
 </code>
-So, on the side of implementor into existing system, the role is to: call the ''TellmapsURIService.registerURI'' in the setup phase of the application and register a callback to provide given task.
+This solution has these advantages:
+  * destructor on path component change - can be used to free memory-intensive resouces, kill dialogs etc.
-Whenever somebody clicks on a link with the hashbang syntax, uses browser history or manually changes the location, callbacks should trigger.
+  * separate GET params / path component / local hash change callbacks - better, isolated events. The event order is as follows:
-''TellmapsURIService'' should handle events of location change and/or parse the [variable, get, local hash] data before use.
+<code>
+(change a path component) -> trigger onPathSet -> trigger onParamChange -> trigger onHashChange
+(change a params part) -> trigger onParamChange only
+(change a local hash part) -> trigger onHashChange only
+</code>
 ===== Server-side implementation =====

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