commit ea7e9f7e100db9e5ffda644296b543802039f503
Author: Jan Schulz-Hofen <jan@plan.io>
Date:   Sun Sep 11 17:49:41 2011 +0200

    * generate project identifier automatically via javascript
    * let users know that identifiers may not start with a number

diff --git a/app/views/projects/_form.rhtml b/app/views/projects/_form.rhtml
index 57b7fbb..772f826 100644
--- a/app/views/projects/_form.rhtml
+++ b/app/views/projects/_form.rhtml
@@ -11,6 +11,7 @@
 <p><%= f.text_area :description, :rows => 5, :class => 'wiki-edit' %></p>
 <p><%= f.text_field :identifier, :required => true, :size => 60, :disabled => @project.identifier_frozen? %>
 <% unless @project.identifier_frozen? %>
+<%= javascript_tag "observeProjectIdentifier(#{Project::IDENTIFIER_MAX_LENGTH});observeProjectName(#{Project::IDENTIFIER_MAX_LENGTH});" %>
 <br /><em><%= l(:text_length_between, :min => 1, :max => Project::IDENTIFIER_MAX_LENGTH) %> <%= l(:text_project_identifier_info) %></em>
 <% end %></p>
 <p><%= f.text_field :homepage, :size => 60 %></p>
diff --git a/config/locales/de.yml b/config/locales/de.yml
index 03e050c..cd99fe2 100644
--- a/config/locales/de.yml
+++ b/config/locales/de.yml
@@ -869,7 +869,7 @@ de:
   text_tip_issue_begin_day: Aufgabe, die an diesem Tag beginnt
   text_tip_issue_end_day: Aufgabe, die an diesem Tag endet
   text_tip_issue_begin_end_day: Aufgabe, die an diesem Tag beginnt und endet
-  text_project_identifier_info: 'Kleinbuchstaben (a-z), Ziffern und Bindestriche erlaubt.<br />Einmal gespeichert, kann die Kennung nicht mehr geändert werden.'
+  text_project_identifier_info: 'Kleinbuchstaben (a-z), Ziffern und Bindestriche erlaubt, muss mit einem Kleinbuchstaben beginnen.<br />Einmal gespeichert, kann die Kennung nicht mehr geändert werden.'
   text_caracters_maximum: "Max. %{count} Zeichen."
   text_caracters_minimum: "Muss mindestens %{count} Zeichen lang sein."
   text_length_between: "Länge zwischen %{min} und %{max} Zeichen."
diff --git a/config/locales/en-GB.yml b/config/locales/en-GB.yml
index 0ac37b2..9fe7309 100644
--- a/config/locales/en-GB.yml
+++ b/config/locales/en-GB.yml
@@ -879,7 +879,7 @@ en-GB:
   text_tip_issue_begin_day: task beginning this day
   text_tip_issue_end_day: task ending this day
   text_tip_issue_begin_end_day: task beginning and ending this day
-  text_project_identifier_info: 'Only lower case letters (a-z), numbers and dashes are allowed.<br />Once saved, the identifier cannot be changed.'
+  text_project_identifier_info: 'Only lower case letters (a-z), numbers and dashes are allowed, must start with a lower case letter.<br />Once saved, the identifier cannot be changed.'
   text_caracters_maximum: "%{count} characters maximum."
   text_caracters_minimum: "Must be at least %{count} characters long."
   text_length_between: "Length between %{min} and %{max} characters."
diff --git a/config/locales/en.yml b/config/locales/en.yml
index c69ab0d..a8fc36f 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -895,7 +895,7 @@ en:
   text_tip_issue_begin_day: issue beginning this day
   text_tip_issue_end_day: issue ending this day
   text_tip_issue_begin_end_day: issue beginning and ending this day
-  text_project_identifier_info: 'Only lower case letters (a-z), numbers and dashes are allowed.<br />Once saved, the identifier cannot be changed.'
+  text_project_identifier_info: 'Only lower case letters (a-z), numbers and dashes are allowed, must start with a lower case letter.<br />Once saved, the identifier cannot be changed.'
   text_caracters_maximum: "%{count} characters maximum."
   text_caracters_minimum: "Must be at least %{count} characters long."
   text_length_between: "Length between %{min} and %{max} characters."
diff --git a/config/locales/fr.yml b/config/locales/fr.yml
index 18119ad..90e84b2 100644
--- a/config/locales/fr.yml
+++ b/config/locales/fr.yml
@@ -867,7 +867,7 @@ fr:
   text_tip_issue_begin_day: tâche commençant ce jour
   text_tip_issue_end_day: tâche finissant ce jour
   text_tip_issue_begin_end_day: tâche commençant et finissant ce jour
-  text_project_identifier_info: 'Seuls les lettres minuscules (a-z), chiffres et tirets sont autorisés.<br />Un fois sauvegardé, l''identifiant ne pourra plus être modifié.'
+  text_project_identifier_info: 'Seuls les lettres minuscules (a-z), chiffres et tirets sont autorisés, doit commencer par une minuscule.<br />Un fois sauvegardé, l''identifiant ne pourra plus être modifié.'
   text_caracters_maximum: "%{count} caractères maximum."
   text_caracters_minimum: "%{count} caractères minimum."
   text_length_between: "Longueur comprise entre %{min} et %{max} caractères."
diff --git a/public/javascripts/application.js b/public/javascripts/application.js
index fdaadc9..dcbca4a 100644
--- a/public/javascripts/application.js
+++ b/public/javascripts/application.js
@@ -243,6 +243,45 @@ function randomKey(size) {
 	return key;
 }
 
+// Automatic project identifier generation
+var projectIdentifierLocked = false;
+
+function generateProjectIdentifier(identifierMaxLength) {
+  var identifier = $('project_name').getValue() // project name
+  identifier = identifier.replace(/ä/g,'ae'); // umlauts
+  identifier = identifier.replace(/ö/g,'oe'); // umlauts
+  identifier = identifier.replace(/ü/g,'ue'); // umlauts
+  identifier = identifier.replace(/Ä/g,'Ae'); // umlauts
+  identifier = identifier.replace(/Ö/g,'Oe'); // umlauts
+  identifier = identifier.replace(/Ü/g,'Ue'); // umlauts
+  identifier = identifier.replace(/ß/g,'ss'); // umlauts
+  identifier = identifier.replace(/[^a-z0-9]+/gi, '-'); // non-alphanumeric => dash
+  identifier = identifier.replace(/^[-\d]*|-*$/g, ''); // remove dashes and numbers at beginning and dashes at end
+  identifier = identifier.toLowerCase(); // to lower
+  identifier = identifier.substr(0,identifierMaxLength); // max characters
+  return identifier;
+}
+
+function observeProjectName(identifierMaxLength) {
+  var f = function() {
+    if(!projectIdentifierLocked) {
+      $('project_identifier').setValue(generateProjectIdentifier(identifierMaxLength));
+    }
+  };
+  Event.observe('project_name', 'keyup', f);
+}
+
+function observeProjectIdentifier(identifierMaxLength) {
+  var f = function() {
+    if($('project_identifier').getValue() != '' && $('project_identifier').getValue() != generateProjectIdentifier(identifierMaxLength)) {
+      projectIdentifierLocked = true;
+    } else {
+      projectIdentifierLocked = false;
+    }
+  };
+  Event.observe('project_identifier', 'keyup', f);
+}
+
 function observeParentIssueField(url) {
   new Ajax.Autocompleter('issue_parent_issue_id',
                          'parent_issue_candidates',