diff --git a/README.md b/README.md
index f6b72f5..db9d13c 100644
--- a/README.md
+++ b/README.md
@@ -58,3 +58,14 @@ Navodila za konstruiranje fajlov pa so tukaj: https://www.drupal.org/docs/contri
 ### Endpoint za dodajanje pojmov
 
 V modulu [yufu_concept](web/modules/custom/yufu_concept/yufu_concept.info.yml "yufu_concept").
+
+
+### Obveščanje prek mailov
+
+1. Ko je dodan nov pojem ali posodobljen star pojem, obvesti o tem vse urednike.
+- ob novi draft revizija se poslje mail urednikom
+
+2. Ko je sprejet nov pojem ali revizija, obvesti uporabnika in ga odblokiraj.
+- ob novi publishani revizijami se poslje mail uporabniku, ki jo je naredil.
+
+Funkcionalnost se nahaja v yufu_admin modulu.
diff --git a/composer.json b/composer.json
index 05171c7..48d691d 100644
--- a/composer.json
+++ b/composer.json
@@ -22,6 +22,8 @@
         "drupal/content_as_config": "^1.0",
         "drupal/core-composer-scaffold": "^10.0",
         "drupal/core-project-message": "^10.0",
+        "drupal/core-recommended": "^10.0",
+        "drupal/diff": "^1.1",
         "drupal/core-recommended": "^10.2.4",
         "drupal/gin": "^3.0@RC",
         "drupal/gin_toolbar": "^1.0@RC",
diff --git a/composer.lock b/composer.lock
index 8390142..0b0b543 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "361a800ffbcff2a4014b57ce994816cf",
+    "content-hash": "1e4c156c402a50481a77ff4b24a87020",
     "packages": [
         {
             "name": "asm89/stack-cors",
@@ -62,6 +62,67 @@
             },
             "time": "2023-11-14T13:51:46+00:00"
         },
+        {
+            "name": "caxy/php-htmldiff",
+            "version": "v0.1.15",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/caxy/php-htmldiff.git",
+                "reference": "6342b02ddb86fd36093ad7e2db2efc21f01ab7cd"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/caxy/php-htmldiff/zipball/6342b02ddb86fd36093ad7e2db2efc21f01ab7cd",
+                "reference": "6342b02ddb86fd36093ad7e2db2efc21f01ab7cd",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-mbstring": "*",
+                "ezyang/htmlpurifier": "^4.7",
+                "php": ">=7.3"
+            },
+            "require-dev": {
+                "doctrine/cache": "~1.0",
+                "phpunit/phpunit": "~9.0"
+            },
+            "suggest": {
+                "doctrine/cache": "Used for caching the calculated diffs using a Doctrine Cache Provider"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "0.1.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Caxy\\HtmlDiff": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "GPL-2.0"
+            ],
+            "authors": [
+                {
+                    "name": "Josh Schroeder",
+                    "email": "jschroeder@caxy.com",
+                    "homepage": "http://www.caxy.com"
+                }
+            ],
+            "description": "A library for comparing two HTML files/snippets and highlighting the differences using simple HTML.",
+            "homepage": "https://github.com/caxy/php-htmldiff",
+            "keywords": [
+                "diff",
+                "html"
+            ],
+            "support": {
+                "issues": "https://github.com/caxy/php-htmldiff/issues",
+                "source": "https://github.com/caxy/php-htmldiff/tree/v0.1.15"
+            },
+            "time": "2023-11-05T23:49:04+00:00"
+        },
         {
             "name": "chi-teck/drupal-code-generator",
             "version": "3.4.0",
@@ -1724,6 +1785,97 @@
             },
             "time": "2024-03-06T08:23:56+00:00"
         },
+        {
+            "name": "drupal/diff",
+            "version": "1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://git.drupalcode.org/project/diff.git",
+                "reference": "8.x-1.1"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://ftp.drupal.org/files/projects/diff-8.x-1.1.zip",
+                "reference": "8.x-1.1",
+                "shasum": "b7558b0f431d5945289829946e0beba61bf7ae18"
+            },
+            "require": {
+                "drupal/core": "^9.3 || ^10",
+                "mkalkbrenner/php-htmldiff-advanced": "~0.0.8"
+            },
+            "type": "drupal-module",
+            "extra": {
+                "drupal": {
+                    "version": "8.x-1.1",
+                    "datestamp": "1665437355",
+                    "security-coverage": {
+                        "status": "covered",
+                        "message": "Covered by Drupal's security advisory policy"
+                    }
+                }
+            },
+            "notification-url": "https://packages.drupal.org/8/downloads",
+            "license": [
+                "GPL-2.0-or-later"
+            ],
+            "authors": [
+                {
+                    "name": "Miro Dietiker (miro_dietiker)",
+                    "homepage": "https://www.drupal.org/u/miro_dietiker",
+                    "role": "Maintainer"
+                },
+                {
+                    "name": "Juampy NR (juampynr)",
+                    "homepage": "https://www.drupal.org/u/juampynr",
+                    "role": "Maintainer"
+                },
+                {
+                    "name": "Lucian Hangea (lhangea)",
+                    "homepage": "https://www.drupal.org/u/lhangea",
+                    "role": "Maintainer"
+                },
+                {
+                    "name": "Alan D.",
+                    "homepage": "https://www.drupal.org/u/alan-d.",
+                    "role": "Maintainer"
+                },
+                {
+                    "name": "Brian Gilbert (realityloop).",
+                    "homepage": "https://www.drupal.org/u/realityloop",
+                    "role": "Maintainer"
+                },
+                {
+                    "name": "lhangea",
+                    "homepage": "https://www.drupal.org/user/2743803"
+                },
+                {
+                    "name": "miro_dietiker",
+                    "homepage": "https://www.drupal.org/user/227761"
+                },
+                {
+                    "name": "phenaproxima",
+                    "homepage": "https://www.drupal.org/user/205645"
+                },
+                {
+                    "name": "realityloop",
+                    "homepage": "https://www.drupal.org/user/139189"
+                },
+                {
+                    "name": "rötzi",
+                    "homepage": "https://www.drupal.org/user/73064"
+                },
+                {
+                    "name": "yhahn",
+                    "homepage": "https://www.drupal.org/user/264833"
+                }
+            ],
+            "description": "Compares two entity revisions",
+            "homepage": "https://www.drupal.org/project/diff",
+            "support": {
+                "source": "http://cgit.drupalcode.org/diff",
+                "issues": "https://www.drupal.org/project/issues/diff"
+            }
+        },
         {
             "name": "drupal/gin",
             "version": "3.0.0-rc7",
@@ -2415,6 +2567,133 @@
             ],
             "time": "2023-10-06T06:47:41+00:00"
         },
+        {
+            "name": "enlightn/security-checker",
+            "version": "v1.11.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/enlightn/security-checker.git",
+                "reference": "68df5c7256c84b428bf8fcff0d249de06ce362d2"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/enlightn/security-checker/zipball/68df5c7256c84b428bf8fcff0d249de06ce362d2",
+                "reference": "68df5c7256c84b428bf8fcff0d249de06ce362d2",
+                "shasum": ""
+            },
+            "require": {
+                "ext-json": "*",
+                "guzzlehttp/guzzle": "^6.3|^7.0",
+                "php": ">=5.6",
+                "symfony/console": "^3.4|^4|^5|^6|^7",
+                "symfony/finder": "^3|^4|^5|^6|^7",
+                "symfony/process": "^3.4|^4|^5|^6|^7",
+                "symfony/yaml": "^3.4|^4|^5|^6|^7"
+            },
+            "require-dev": {
+                "ext-zip": "*",
+                "friendsofphp/php-cs-fixer": "^2.18|^3.0",
+                "phpunit/phpunit": "^5.5|^6|^7|^8|^9"
+            },
+            "bin": [
+                "security-checker"
+            ],
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Enlightn\\SecurityChecker\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Paras Malhotra",
+                    "email": "paras@laravel-enlightn.com"
+                },
+                {
+                    "name": "Miguel Piedrafita",
+                    "email": "soy@miguelpiedrafita.com"
+                }
+            ],
+            "description": "A PHP dependency vulnerabilities scanner based on the Security Advisories Database.",
+            "keywords": [
+                "package",
+                "php",
+                "scanner",
+                "security",
+                "security advisories",
+                "vulnerability scanner"
+            ],
+            "support": {
+                "issues": "https://github.com/enlightn/security-checker/issues",
+                "source": "https://github.com/enlightn/security-checker/tree/v1.11.0"
+            },
+            "time": "2023-11-17T07:53:29+00:00"
+        },
+        {
+            "name": "ezyang/htmlpurifier",
+            "version": "v4.17.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/ezyang/htmlpurifier.git",
+                "reference": "bbc513d79acf6691fa9cf10f192c90dd2957f18c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/ezyang/htmlpurifier/zipball/bbc513d79acf6691fa9cf10f192c90dd2957f18c",
+                "reference": "bbc513d79acf6691fa9cf10f192c90dd2957f18c",
+                "shasum": ""
+            },
+            "require": {
+                "php": "~5.6.0 || ~7.0.0 || ~7.1.0 || ~7.2.0 || ~7.3.0 || ~7.4.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0"
+            },
+            "require-dev": {
+                "cerdic/css-tidy": "^1.7 || ^2.0",
+                "simpletest/simpletest": "dev-master"
+            },
+            "suggest": {
+                "cerdic/css-tidy": "If you want to use the filter 'Filter.ExtractStyleBlocks'.",
+                "ext-bcmath": "Used for unit conversion and imagecrash protection",
+                "ext-iconv": "Converts text to and from non-UTF-8 encodings",
+                "ext-tidy": "Used for pretty-printing HTML"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "library/HTMLPurifier.composer.php"
+                ],
+                "psr-0": {
+                    "HTMLPurifier": "library/"
+                },
+                "exclude-from-classmap": [
+                    "/library/HTMLPurifier/Language/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "LGPL-2.1-or-later"
+            ],
+            "authors": [
+                {
+                    "name": "Edward Z. Yang",
+                    "email": "admin@htmlpurifier.org",
+                    "homepage": "http://ezyang.com"
+                }
+            ],
+            "description": "Standards compliant HTML filter written in PHP",
+            "homepage": "http://htmlpurifier.org/",
+            "keywords": [
+                "html"
+            ],
+            "support": {
+                "issues": "https://github.com/ezyang/htmlpurifier/issues",
+                "source": "https://github.com/ezyang/htmlpurifier/tree/v4.17.0"
+            },
+            "time": "2023-11-17T15:01:25+00:00"
+        },
         {
             "name": "grasmash/expander",
             "version": "3.0.0",
@@ -3046,6 +3325,47 @@
             },
             "time": "2023-08-12T08:29:29+00:00"
         },
+        {
+            "name": "mkalkbrenner/php-htmldiff-advanced",
+            "version": "0.0.8",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/mkalkbrenner/php-htmldiff.git",
+                "reference": "3a714b48c9c3d3730baaf6d3949691e654cd37c9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/mkalkbrenner/php-htmldiff/zipball/3a714b48c9c3d3730baaf6d3949691e654cd37c9",
+                "reference": "3a714b48c9c3d3730baaf6d3949691e654cd37c9",
+                "shasum": ""
+            },
+            "require": {
+                "caxy/php-htmldiff": ">=0.0.6",
+                "php": ">=5.5.0"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "src/HtmlDiffAdvancedInterface.php",
+                    "src/HtmlDiffAdvanced.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "GNU General Public License V2"
+            ],
+            "description": "An add-on for the php-htmldiff library for comparing two HTML files/snippets and highlighting the differences using simple HTML.",
+            "homepage": "https://github.com/mkalkbrenner/php-htmldiff",
+            "keywords": [
+                "diff",
+                "html"
+            ],
+            "support": {
+                "issues": "https://github.com/mkalkbrenner/php-htmldiff/issues",
+                "source": "https://github.com/mkalkbrenner/php-htmldiff/tree/master"
+            },
+            "time": "2016-07-25T17:07:32+00:00"
+        },
         {
             "name": "nikic/php-parser",
             "version": "v5.0.2",
@@ -3259,9 +3579,9 @@
             },
             "type": "library",
             "autoload": {
-                "psr-0": {
-                    "": "src/"
-                }
+                "classmap": [
+                    "src/"
+                ]
             },
             "notification-url": "https://packagist.org/downloads/",
             "include-path": [
@@ -6842,5 +7162,5 @@
     "prefer-lowest": false,
     "platform": [],
     "platform-dev": [],
-    "plugin-api-version": "2.6.0"
+    "plugin-api-version": "2.3.0"
 }
diff --git a/config/sync/core.entity_view_display.node.concept.default.yml b/config/sync/core.entity_view_display.node.concept.default.yml
index 545104e..f0faf1c 100644
--- a/config/sync/core.entity_view_display.node.concept.default.yml
+++ b/config/sync/core.entity_view_display.node.concept.default.yml
@@ -23,9 +23,9 @@ content:
     weight: 101
     region: content
   content_moderation_control:
+    weight: -20
     settings: {  }
     third_party_settings: {  }
-    weight: -20
     region: content
   field_media:
     type: entity_reference_entity_view
diff --git a/config/sync/core.entity_view_display.node.concept.teaser.yml b/config/sync/core.entity_view_display.node.concept.teaser.yml
index 66c79a4..58e7bc4 100644
--- a/config/sync/core.entity_view_display.node.concept.teaser.yml
+++ b/config/sync/core.entity_view_display.node.concept.teaser.yml
@@ -25,9 +25,9 @@ content:
     weight: 101
     region: content
   content_moderation_control:
+    weight: -20
     settings: {  }
     third_party_settings: {  }
-    weight: -20
     region: content
   links:
     settings: {  }
diff --git a/config/sync/core.entity_view_mode.node.diff.yml b/config/sync/core.entity_view_mode.node.diff.yml
new file mode 100644
index 0000000..df4242b
--- /dev/null
+++ b/config/sync/core.entity_view_mode.node.diff.yml
@@ -0,0 +1,16 @@
+uuid: 2051b25b-0ca8-4406-a590-921e0d66c18d
+langcode: en
+status: false
+dependencies:
+  module:
+    - node
+  enforced:
+    module:
+      - node
+      - diff
+_core:
+  default_config_hash: pqZNtad5J9THcdbYjwPD4qINqvrTxnOd8KCWn6tUBRs
+id: node.diff
+label: 'Revision comparison'
+targetEntityType: node
+cache: true
diff --git a/config/sync/core.extension.yml b/config/sync/core.extension.yml
index 083257a..ac517ee 100644
--- a/config/sync/core.extension.yml
+++ b/config/sync/core.extension.yml
@@ -17,6 +17,7 @@ module:
   contextual: 0
   datetime: 0
   dblog: 0
+  diff: 0
   dynamic_page_cache: 0
   editor: 0
   etherpad_api: 0
diff --git a/config/sync/diff.plugins.yml b/config/sync/diff.plugins.yml
new file mode 100644
index 0000000..282eafe
--- /dev/null
+++ b/config/sync/diff.plugins.yml
@@ -0,0 +1,345 @@
+fields:
+  block_content:
+    langcode:
+      type: hidden
+      settings: {  }
+    revision_created:
+      type: hidden
+      settings: {  }
+    revision_user:
+      type: hidden
+      settings: {  }
+    status:
+      type: hidden
+      settings: {  }
+    info:
+      type: hidden
+      settings: {  }
+    changed:
+      type: hidden
+      settings: {  }
+    default_langcode:
+      type: hidden
+      settings: {  }
+    revision_default:
+      type: hidden
+      settings: {  }
+    revision_translation_affected:
+      type: hidden
+      settings: {  }
+    body:
+      type: text_summary_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+        compare_format: 0
+        compare_summary: 0
+  content_moderation_state:
+    langcode:
+      type: hidden
+      settings: {  }
+    uid:
+      type: hidden
+      settings: {  }
+    workflow:
+      type: hidden
+      settings: {  }
+    moderation_state:
+      type: hidden
+      settings: {  }
+    content_entity_type_id:
+      type: hidden
+      settings: {  }
+    content_entity_id:
+      type: hidden
+      settings: {  }
+    content_entity_revision_id:
+      type: hidden
+      settings: {  }
+    default_langcode:
+      type: hidden
+      settings: {  }
+    revision_default:
+      type: hidden
+      settings: {  }
+    revision_translation_affected:
+      type: hidden
+      settings: {  }
+  media:
+    langcode:
+      type: hidden
+      settings: {  }
+    revision_created:
+      type: hidden
+      settings: {  }
+    revision_user:
+      type: hidden
+      settings: {  }
+    revision_log_message:
+      type: hidden
+      settings: {  }
+    status:
+      type: hidden
+      settings: {  }
+    uid:
+      type: hidden
+      settings: {  }
+    name:
+      type: hidden
+      settings: {  }
+    thumbnail:
+      type: image_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+        show_id: 0
+        compare_alt_field: 1
+        compare_title_field: 1
+        property_separator: nl
+        show_thumbnail: 1
+    created:
+      type: hidden
+      settings: {  }
+    changed:
+      type: hidden
+      settings: {  }
+    default_langcode:
+      type: hidden
+      settings: {  }
+    revision_default:
+      type: hidden
+      settings: {  }
+    revision_translation_affected:
+      type: hidden
+      settings: {  }
+    field_media_audio_file:
+      type: file_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+        show_id: 1
+        compare_description_field: 0
+        compare_display_field: 0
+        property_separator: nl
+    field_media_document:
+      type: file_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+        show_id: 1
+        compare_description_field: 0
+        compare_display_field: 0
+        property_separator: nl
+    field_media_image:
+      type: image_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+        show_id: 0
+        compare_alt_field: 1
+        compare_title_field: 1
+        property_separator: nl
+        show_thumbnail: 1
+    field_media_oembed_video:
+      type: core_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+    field_media_video_file:
+      type: file_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+        show_id: 1
+        compare_description_field: 0
+        compare_display_field: 0
+        property_separator: nl
+  menu_link_content:
+    langcode:
+      type: hidden
+      settings: {  }
+    revision_created:
+      type: hidden
+      settings: {  }
+    revision_user:
+      type: hidden
+      settings: {  }
+    revision_log_message:
+      type: hidden
+      settings: {  }
+    enabled:
+      type: core_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+    title:
+      type: core_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+    description:
+      type: core_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+    link:
+      type: hidden
+      settings: {  }
+    external:
+      type: hidden
+      settings: {  }
+    changed:
+      type: hidden
+      settings: {  }
+    default_langcode:
+      type: hidden
+      settings: {  }
+    revision_default:
+      type: hidden
+      settings: {  }
+    revision_translation_affected:
+      type: hidden
+      settings: {  }
+  node:
+    langcode:
+      type: hidden
+      settings: {  }
+    revision_timestamp:
+      type: hidden
+      settings: {  }
+    status:
+      type: hidden
+      settings: {  }
+    uid:
+      type: entity_reference_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+        compare_entity_reference: 1
+    title:
+      type: core_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+    created:
+      type: core_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+    changed:
+      type: hidden
+      settings: {  }
+    promote:
+      type: hidden
+      settings: {  }
+    sticky:
+      type: hidden
+      settings: {  }
+    default_langcode:
+      type: hidden
+      settings: {  }
+    revision_default:
+      type: hidden
+      settings: {  }
+    revision_translation_affected:
+      type: hidden
+      settings: {  }
+    content_translation_source:
+      type: hidden
+      settings: {  }
+    content_translation_outdated:
+      type: hidden
+      settings: {  }
+    body:
+      type: text_summary_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+        compare_format: 0
+        compare_summary: 0
+    comment:
+      type: hidden
+      settings: {  }
+    field_image:
+      type: image_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+        show_id: 0
+        compare_alt_field: 1
+        compare_title_field: 1
+        property_separator: nl
+        show_thumbnail: 1
+    field_media:
+      type: entity_reference_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+        compare_entity_reference: 1
+    field_related_concept:
+      type: entity_reference_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+        compare_entity_reference: 1
+    field_tags:
+      type: entity_reference_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+        compare_entity_reference: 1
+  path_alias:
+    langcode:
+      type: hidden
+      settings: {  }
+    path:
+      type: hidden
+      settings: {  }
+    alias:
+      type: hidden
+      settings: {  }
+    status:
+      type: hidden
+      settings: {  }
+    revision_default:
+      type: hidden
+      settings: {  }
+  taxonomy_term:
+    langcode:
+      type: hidden
+      settings: {  }
+    revision_created:
+      type: hidden
+      settings: {  }
+    revision_user:
+      type: hidden
+      settings: {  }
+    revision_log_message:
+      type: hidden
+      settings: {  }
+    status:
+      type: hidden
+      settings: {  }
+    name:
+      type: core_field_diff_builder
+      settings:
+        show_header: 1
+        markdown: drupal_html_to_text
+    description:
+      type: hidden
+      settings: {  }
+    parent:
+      type: hidden
+      settings: {  }
+    changed:
+      type: hidden
+      settings: {  }
+    default_langcode:
+      type: hidden
+      settings: {  }
+    revision_default:
+      type: hidden
+      settings: {  }
+    revision_translation_affected:
+      type: hidden
+      settings: {  }
diff --git a/config/sync/diff.settings.yml b/config/sync/diff.settings.yml
new file mode 100644
index 0000000..699bbbb
--- /dev/null
+++ b/config/sync/diff.settings.yml
@@ -0,0 +1,18 @@
+_core:
+  default_config_hash: oXwX3NzLv9QK_LbNEvpQ9OPwH9tqtMSJzq5y8t63Q8w
+general_settings:
+  radio_behavior: simple
+  context_lines_leading: 1
+  context_lines_trailing: 1
+  revision_pager_limit: 50
+  layout_plugins:
+    visual_inline:
+      enabled: true
+      weight: 0
+    split_fields:
+      enabled: true
+      weight: 1
+    unified_fields:
+      enabled: true
+      weight: 2
+  visual_inline_theme: default
diff --git a/config/sync/user.role.editor.yml b/config/sync/user.role.editor.yml
index faa7b66..8e6110a 100644
--- a/config/sync/user.role.editor.yml
+++ b/config/sync/user.role.editor.yml
@@ -19,6 +19,7 @@ dependencies:
     - config_translation
     - content_moderation
     - content_translation
+    - file
     - language
     - locale
     - media
@@ -65,6 +66,7 @@ permissions:
   - 'delete own audio media'
   - 'delete own concept content'
   - 'delete own document media'
+  - 'delete own files'
   - 'delete own page content'
   - 'delete page revisions'
   - 'delete terms in tags'
diff --git a/config/sync/workflows.workflow.concept_workflow.yml b/config/sync/workflows.workflow.concept_workflow.yml
index 6a1a08f..2a9f526 100644
--- a/config/sync/workflows.workflow.concept_workflow.yml
+++ b/config/sync/workflows.workflow.concept_workflow.yml
@@ -11,6 +11,11 @@ label: 'Concept workflow'
 type: content_moderation
 type_settings:
   states:
+    archived:
+      label: Archived
+      weight: 2
+      published: false
+      default_revision: false
     draft:
       label: Draft
       weight: 0
@@ -22,6 +27,13 @@ type_settings:
       published: true
       default_revision: true
   transitions:
+    archive:
+      label: Archive
+      from:
+        - draft
+        - published
+      to: archived
+      weight: 2
     create_new_draft:
       label: 'Create New Draft'
       from:
diff --git a/web/modules/custom/yufu_admin/README.md b/web/modules/custom/yufu_admin/README.md
new file mode 100644
index 0000000..acd912b
--- /dev/null
+++ b/web/modules/custom/yufu_admin/README.md
@@ -0,0 +1,12 @@
+# Yufu Admin
+
+Administrativna in uredniška funkcionalnost.
+
+Obveščanje preko mailov, ko se spremeni revizija koncepta.
+
+## Testiranje
+
+1. Kot anonimni uporabnik predlagamo spremembe koncepta preko frontend apija.
+2. Kot urednik objavimo predlagane spremembe.
+   - Fino bi bilo imet pregled (view) predlaganih in še ne objavljenih sprememb.
+3. Pogledamo v mailhog, če so se maili poslali. (ddev status)
diff --git a/web/modules/custom/yufu_admin/translations/yufu_admin.sl.po b/web/modules/custom/yufu_admin/translations/yufu_admin.sl.po
new file mode 100644
index 0000000..c027755
--- /dev/null
+++ b/web/modules/custom/yufu_admin/translations/yufu_admin.sl.po
@@ -0,0 +1,41 @@
+# Slovenian translations for yufu_admin module
+#
+
+msgid "jsonapi Output"
+msgstr "Izpljunek jsonapija"
+
+msgid "[YUFU] New concept draft: @title"
+msgstr "[YUFU] Nov osnutek pojma: @title"
+
+msgid "[YUFU] Your concept (changes) were approved: @title"
+msgstr "[YUFU] Tvoj predlog sprememb pojma @title je bil potrjen."
+
+msgid "[YUFU] Your concept (changes) were rejected: @title"
+msgstr "[YUFU] Tvoj predlog sprememb pojma @title je bil zavržen"
+
+msgid "New concept created: @title - @url"
+msgstr "Ustvrjen je bil nov pojem @title - @url"
+
+msgid "For transition @transition of concept @title (@nid) to recipients @recipients."
+msgstr "Za tranzicijo @transition koncepta @title (@nid) prejemnikom @recipients."
+
+msgid "Unknown"
+msgstr "Neznan"
+
+msgid "There was a problem sending your message and it was not sent. "
+msgstr "Prišlo je do problema pri pošiljanju e-poštnega sporočila in le no ni bilo poslano. "
+
+msgid "Your message has been sent. "
+msgstr "E-poštno sporočilo je bilo poslano. "
+
+msgid "@editor (@uid) is missing email."
+msgstr "Urednik @editor (@uid) nima nastavljenega emaila."
+
+msgid "New concept created: @title - @url"
+msgstr "Ustvarjen je bil nov koncept: @title - @url"
+
+msgid "Published changes not attributed to any of knownn users: @title - @url"
+msgstr "Potrjene spremembe ne pripadajo nobenemu znanemu uporabniku: @title - @url"
+
+msgid "There was a problem sending your message and it was not sent. For transition @transition."
+msgstr "Prišlo je do problema pri pošiljanju e-poštnega sporočila in le to ni bilo poslano. Za tranzicijo @transition"
diff --git a/web/modules/custom/yufu_admin/yufu_admin.module b/web/modules/custom/yufu_admin/yufu_admin.module
index 7dd23f6..69ed080 100644
--- a/web/modules/custom/yufu_admin/yufu_admin.module
+++ b/web/modules/custom/yufu_admin/yufu_admin.module
@@ -7,6 +7,7 @@
 
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Url;
+use Drupal\node\NodeInterface;
 
 /**
  * Implements hook_entity_operation().
@@ -14,7 +15,7 @@ use Drupal\Core\Url;
 function yufu_admin_entity_operation(EntityInterface $entity) {
   $operations = [];
   $entityType = $entity->getEntityType();
-  // @todo Only for entity node - should we add other entities as well?
+  // @TODO Only for entity node - should we add other entities as well?
   if ($entityType->id() === 'node' && \Drupal::currentUser()->hasPermission('use jsonapi operation link')) {
     // Build the url.
     $url = Url::fromRoute(sprintf('jsonapi.%s--%s.individual', $entityType->id(), $entity->bundle()),
@@ -28,3 +29,249 @@ function yufu_admin_entity_operation(EntityInterface $entity) {
   }
   return $operations;
 }
+
+/**
+ * Implements hook_mail().
+ */
+function yufu_admin_mail($key, &$message, $params) {
+  $options = ['langcode' => $message['langcode']];
+
+  switch ($key) {
+    case 'concept_drafted':
+      $message['from'] = \Drupal::config('system.site')->get('mail');
+      $message['subject'] = t('[YUFU] New concept draft: @title', ['@title' => $params['node_title']], $options);
+      $message['body'][] = $params['message'];
+      break;
+    case 'concept_approved':
+      $message['from'] = \Drupal::config('system.site')->get('mail');
+      $message['subject'] = t('[YUFU] Concept changes approved: @title', ['@title' => $params['node_title']], $options);
+      $message['body'][] = $params['message'];
+      break;
+    case 'concept_rejected':
+      $message['from'] = \Drupal::config('system.site')->get('mail');
+      $message['subject'] = t('[YUFU] Concept changes rejected: @title', ['@title' => $params['node_title']], $options);
+      $message['body'][] = $params['message'];
+  }
+}
+
+/**
+ * Implements hook_ENTITY_TYPE_presave().
+ */
+function yufu_admin_node_presave(EntityInterface $entity) {
+  if ($entity instanceOf NodeInterface && $entity->bundle() == 'concept') {
+    // Get transition: concept_drafted, concept_approved, concept_rejected.
+    if ($entity->isNew()) {
+      $transition = 'concept_drafted';
+    }
+    else {
+      $transition = _yufu_admin_get_node_transition($entity);
+    }
+    switch ($transition) {
+      case 'stay_draft':
+      case 'concept_drafted':
+        // Send email to editors.
+        $params = _yufu_admin_concept_drafted_mail($entity);
+        $result = _yufu_admin_send_email($transition, $params['to'], $params);
+        _yufu_admin_status_message($result['result'], $transition, $entity, $params['to']);
+        break;
+      case 'concept_approved':
+        // Send email to revision creator (user).
+        // @TODO Maybe notify other editors.
+        $params = _yufu_admin_concept_approved_get_message($entity);
+        $result = _yufu_admin_send_email($transition, $params['to'], $params);
+        _yufu_admin_status_message($result['result'], $transition, $entity, $params['to']);
+        break;
+      case 'concept_rejectd':
+        // Send email to revision creator (user).
+        // This transition happens on revision delete.
+        // Curently it is dead.
+        // @TODO https://git.kompot.si/yufu/manifest/issues/45
+        break;
+    }
+  }
+}
+
+/**
+ * Compare original node moderation state with current state.
+ *
+ * @param \Drupal\node\NodeInterface $node
+ *   Node to check transition on.
+ *
+ * @return string|null
+ *   Name of the transition.
+ */
+function _yufu_admin_get_node_transition(NodeInterface $node) {
+  $original = $node->original ?? NULL;
+  $moderation_state = $node->moderation_state->value;
+  $previous_state = $original?->moderation_state->value ?? NULL;
+  if ($moderation_state == 'draft' && in_array($previous_state, ['published', NULL])) {
+    return 'concept_drafted';
+  }
+  else if ($moderation_state == 'published' && $previous_state == 'draft') {
+    return 'concept_approved';
+  }
+  else if ($moderation_state == 'published' && $previous_state == 'published') {
+    return 'stay_published';
+  }
+  else if ($moderation_state == 'draft' && $previous_state == 'draft') {
+    return 'stay_draft';
+  }
+  return NULL;
+}
+
+/**
+ * Notify user that their concept (revision) was published.
+ *
+ * @param \Drupal\node\NodeInterface $node
+ *   Concept node that was transitioned into published state.
+ */
+function _yufu_admin_concept_drafted_mail(NodeInterface $node) {
+  $to = _yufu_admin_get_all_editors_emails();
+  if ($node->isNew()) {
+    $params['message'] = t('New concept created: @title - @url', [
+      '@title' => $node->getTitle(),
+      '@url' => !$node->isNew() ? $node?->toUrl()?->toString() : '',
+    ]);
+  }
+  else {
+    $params['message'] = t('New changes to concept proposed: @title - @url', [
+      '@title' => $node->getTitle(),
+      '@url' => !$node->isNew() ? $node?->toUrl()?->toString() : '',
+    ]);
+  }
+  $params['node_title'] = $node->getTitle();
+  $params['to'] = implode(',', $to);
+  return $params;
+}
+
+/**
+ * Function for sending emails.
+ *
+ * @param string $key
+ *   Transition of a concept.
+ * @param string $to
+ *   List of recipients.
+ * @param array $params
+ *   Message parameters.
+ *
+ * @return array
+ *   Mail manager response.
+ */
+function _yufu_admin_send_email($key = '', $to = '', $params = []) {
+  $mailManager = \Drupal::service('plugin.manager.mail');
+  $module = 'yufu_admin';
+  $langcode = \Drupal::currentUser()->getPreferredLangcode();
+  $send = TRUE;
+  $result = $mailManager->mail($module, $key, $to, $langcode, $params, NULL, $send);
+}
+
+/**
+ * Add notifications on sending of emails.
+ */
+function _yufu_admin_status_message($result, $transition = '', $node = NULL, $recipients = '') {
+  $log = t('For transition @transition of concept @title (@nid) to recipients @recipients.', [
+    '@transition' => $transition,
+    '@title' => $node?->getTitle() ?? t('Unknown'),
+    '@nid' => $node?->id() ?? '',
+    '@recipients' => $recipients,
+  ]);
+  if ($result !== TRUE) {
+    $message = t('There was a problem sending your message and it was not sent. ');
+    Drupal::logger('yufu_admin')->error($message . $log);
+    Drupal::messenger()->addError($message . $log);
+  }
+  else {
+    $message = t('Your message has been sent. ');
+    Drupal::logger('yufu_admin')->notice($message . $log);
+    Drupal::messenger()->addStatus($message . $log);
+  }
+}
+
+/**
+ * Get a list of emails of all editors.
+ *
+ * @return array
+ *   List of strings.
+ */
+function _yufu_admin_get_all_editors_emails() {
+  $user_storage = \Drupal::entityTypeManager()->getStorage('user');
+  $ids = $user_storage->getQuery()
+    ->condition('status', 1)
+    ->condition('roles', 'administrator')
+    ->accessCheck(FALSE)
+    ->execute();
+  $editors = $user_storage->loadMultiple($ids);
+  $emails = [];
+  foreach ($editors as $editor) {
+    /* @var \Drupal\user\UserInterface $user */
+    if ($email = $editor?->getEmail()) {
+      $emails[] = $email;
+    }
+    else {
+      \Drupal::logger('yufu_admin')->warning('@editor (@uid) is missing email.',[
+        '@editor' => $editor?->getDisplayName() ?? '',
+        '@uid' => $editor->id(),
+      ]);
+    }
+  }
+  return $emails;
+}
+
+/**
+ * Notify user that their concept (revision) was published.
+ *
+ * @param \Drupal\node\NodeInterface $node
+ *   Concept node that was transitioned into published state.
+ */
+function _yufu_admin_concept_approved_get_message(NodeInterface $node) {
+  // To the revision's authors.
+  // @TODO - to make this work properly, we should get a list of all authors of
+  // unpublished revisions so far since the last published revision.
+  if ($to = _yufu_admin_get_pioneer_email($node)) {
+    $params['message'] = t('Your proposal of changes to concept were approved: @title - @url', [
+      '@title' => $node->getTitle(),
+      '@url' => $node?->toUrl()?->toString() ?? '',
+    ]);
+  }
+  else {
+    $to = implode(',', _yufu_admin_get_all_editors_emails());
+    $params['message'] = t('Published changes not attributed to any of knownn users: @title - @url', [
+      '@title' => $node->getTitle(),
+      '@url' => !$node->isNew() ? $node?->toUrl()?->toString() : '',
+    ]);
+  }
+  $params['node_title'] = $node->getTitle();
+  $params['to'] = $to;
+  return $params;
+}
+
+/**
+ * Get the email of person (pioneer) that worked on proposed changes.
+ *
+ * @return string|NULL
+ *   List of strings.
+ */
+function _yufu_admin_get_pioneer_email(NodeInterface $node) {
+  // $email = $node->uid->entity;
+  if ($original = $node->original) {
+    $user = $original->getRevisionUser();
+    $email = $user->getEmail();
+    return $email ?? NULL;
+  }
+  // @TODO: Make this code nicer.
+  $user = $node->getRevisionUser();
+  $email = $user->getEmail();
+  return $email ?? NULL;
+}
+
+
+/**
+ * Get a list of emails of people that worked on proposed changes.
+ *
+ * @return array
+ *   List of strings.
+ */
+function _yufu_admin_get_all_pioneer_emails() {
+  // @TODO: Think it through if it is really needed.
+  return [];
+}
diff --git a/web/modules/custom/yufu_concept/src/Plugin/rest/resource/AddConcept.php b/web/modules/custom/yufu_concept/src/Plugin/rest/resource/AddConcept.php
index 258d09d..318568c 100644
--- a/web/modules/custom/yufu_concept/src/Plugin/rest/resource/AddConcept.php
+++ b/web/modules/custom/yufu_concept/src/Plugin/rest/resource/AddConcept.php
@@ -2,7 +2,6 @@
 
 namespace Drupal\yufu_concept\Plugin\rest\resource;
 
-use Drupal\Core\Config\ConfigFactoryInterface;
 use Drupal\Core\Entity\EntityTypeManagerInterface;
 use Drupal\Core\Session\AccountProxyInterface;
 use Drupal\Core\StringTranslation\StringTranslationTrait;
@@ -127,6 +126,8 @@ class AddConcept extends ResourceBase {
       $concept->isDefaultRevision(FALSE);
       $concept->setRevisionLogMessage('New revision by concept endpoint.');
       $concept->moderation_state->target_id = 'draft';
+      $concept->set('status', 0);
+      $concept->setUnpublished();
       $concept->save();
       $this->logger->notice('New concept @title revision @revid created by uid @uid.', [
         '@title' => $concept->getTitle(),