Nahlédněte za oponu VersionPressu

1. VersionPress NAHLÉDNĚTE ZA OPONU Jan Voráček

2. Dotazy https://sli.do/#wcphadev

3. VersionPress Open-source verzovací plugin Sebemenší změna na webu = nová verze Umožňuje týmová workflows https://sli.do/#wcphadev

4. Největší výzvy Unikátní identifikace databázových entit Cizí klíče ve WP Špatný návrh databáze / zneužívání základních tabulek Sledování všech změn Formát vhodný pro ukládání / přenos / mergování Vlastní tabulky pluginů / témat vzhledů https://sli.do/#wcphadev

5. Databáze Smutný příběh jednoho CMS https://sli.do/#wcphadev

6. Unikátní identifikace entit Your site Staging Production New post (nav_menu_item) ID: 13 Your site New post (page) ID: 13 ? https://sli.do/#wcphadev

7. Unikátní identifikace entit https://sli.do/#wcphadev

8. Unikátní identifikace entit Your site Staging Production New post (nav_menu_item) ID: 13 Your site New post (page) ID: 13 ? https://sli.do/#wcphadev

9. Unikátní identifikace entit Your site Staging Production New post (nav_menu_item) ID: 13 VPID: A34B38985CD356 Your site New post (page) ID: 13 VPID: 8356A35CD4B389 ✓ https://sli.do/#wcphadev

10. Unikátní identifikace entit New post (nav_menu_item) ID: 13 VPID: A34B38985CD356 Your site New post (page) ID: 13 VPID: 8356A35CD4B389 Post (nav_menu_item) ID: 14 VPID: A34B38985CD356 Post (page) ID: 13 VPID: 8356A35CD4B389 https://sli.do/#wcphadev

11. Unikátní identifikace entit New post (nav_menu_item) ID: 13 VPID: A34B38985CD356 Your site New post (page) ID: 13 VPID: 8356A35CD4B389 Post (nav_menu_item) ID: 14 VPID: A34B38985CD356 Post (page) ID: 13 VPID: 8356A35CD4B389 https://sli.do/#wcphadev

12. Cizí klíče https://sli.do/#wcphadev

13. Cizí klíče schema.php: CREATE TABLE $wpdb->postmeta ( meta_id bigint(20) unsigned NOT NULL auto_increment, post_id bigint(20) unsigned NOT NULL default '0', meta_key varchar(255) default NULL, meta_value longtext, PRIMARY KEY (meta_id), KEY post_id (post_id), KEY meta_key (meta_key($max_index_length)) ) $charset_collate; https://sli.do/#wcphadev

14. Cizí klíče post: table: posts id: ID … postmeta: id: meta_id parent-reference: post_id references: post_id: post value-references: meta_key@meta_value: _thumbnail_id: post _menu_item_object_id: '@vp_get_menu_reference' https://sli.do/#wcphadev

20. Cizí klíče wp_posts wp_term_taxonomy wp_posts https://sli.do/#wcphadev

25. Cizí klíče [ 0 => false, 'auto_add' => [ 0 => 2 ] ] https://sli.do/#wcphadev

26. Cizí klíče option: table: options vpid: option_name value-references: option_name@option_value: site_icon: post page_on_front: post page_for_posts: post default_category: term default_email_category: term widget_nav_menu[/d+/]["nav_menu"]: term widget_pages[/d+/]["exclude"]: post nav_menu_options["auto_add"][/d+/]: term featured-content["tag-id"]: term theme_mods_*["nav_menu_locations"][/.*/]: term https://sli.do/#wcphadev

27. DB návrh WP / pluginů „12 tabulek by mělo stačit každému" – Autor neznámý https://sli.do/#wcphadev

28. DB návrh WP / pluginů Post Types: ◦ post ◦ page ◦ attachment ◦ revision ◦ nav_menu_item ◦ custom_css ◦ customize_changeset https://sli.do/#wcphadev

29. DB návrh WP / pluginů { "widget_text[2]": { "starter_content": true, "value": { "encoded_serialized_instance": "YToyOntzOjU6InRpdGxlIjtzOjc6IkZpbmQgVXMiO3M6NDoidGV4dCI7czoyMDA6IjxwPjxzdHJvbmc+QWRkcmVzczwvc3Ryb25nPjxiciA vPjEyMyBNYWluIFN0cmVldDxiciAvPk5ldyBZb3JrLCBOWSAxMDAwMTwvcD48cD48c3Ryb25nPkhvdXJzPC9zdHJvbmc+PGJyIC8+TW9 uZGF5Jm1kYXNoO0ZyaWRheTogOTowMEFNJm5kYXNoOzU6MDBQTTxiciAvPlNhdHVyZGF5ICZhbXA7IFN1bmRheTogMTE6MDBBTSZ uZGFzaDszOjAwUE08L3A+Ijt9", "title": "Find Us", "is_widget_customizer_js_value": true, "instance_hash_key": "d16b28dc2af40b7d8ee54668bd545ed1" }, "type": "option", "user_id": 1 }, "widget_search[3]": { "starter_content": true, "value": { "encoded_serialized_instance": "YToxOntzOjU6InRpdGxlIjtzOjY6IlNlYXJjaCI7fQ==“, customize_changeset in wp_posts https://sli.do/#wcphadev

32. Workflows WordPress na steroidech https://sli.do/#wcphadev

33. Úložiště dat Databáze ◦ Obtížné verzování ◦ Slabší programovací jazyk ◦ Složité diffy ◦ Běžné média soubory >> běžné DB řádky Filesystém ◦ Verzování => Git ◦ PHP > PL/SQL ◦ Diffy => Git ◦ Počet běžných DB řádek >> počet souborů https://sli.do/#wcphadev

34. Formát pro ukládání Soubory se nemění DB záznamy je potřeba šikovně diffovat ◦ Řádek v DB == soubor ◦ Sloupec v DB == řádek v souboru ◦ DDL? JSON? Serializovaný objekt? https://sli.do/#wcphadev

35. Formát pro ukládání – INI !!! [8CFC6D1208DC4D0F877039A3B8300366] post_date = "2016-02-11 17:29:03” post_date_gmt = "2016-02-11 17:29:03” post_content = "live" post_content_filtered = "" post_title = "Added on LIVE" post_excerpt = "" post_status = "publish" post_type = "post" comment_status = "open" ping_status = "open" post_password = "" post_name = "added-on-live" to_ping = "" pinged = "" menu_order = 0 post_mime_type = "" guid = "http://3D13C49A-BE86-4C8B-B4ED-D83222FFB296" vp_post_author = "528E14A1AAD04CC08121DD631B2F6591" vp_post_parent = 0 vp_term_taxonomy[0] = "752CC32F4AF842A79BEF42454E130743" https://sli.do/#wcphadev

36. Formát pro ukládání commit ac33c7943bb2d947d0e9769b70dd2f2cfe56b7c5 Author: admin <jan@voracek.net> Date: Sat Feb 18 01:08:31 2017 +0100 [VP] Unapproved comment for post 'Vítejte!' VP-Action: comment/unapprove/32EB4B4D4D944039818CF9DF3EB73E62 VP-Comment-Author: A WordPress Commenter VP-Comment-PostTitle: Vítejte! X-VP-Version: DEV X-VP-Environment: default --- a/wp-content/vpdb/comments/32/32EB4B4D4D944039818CF9DF3EB73E62.ini +++ b/wp-content/vpdb/comments/32/32EB4B4D4D944039818CF9DF3EB73E62.ini @@ -9,7 +9,7 @@ comment_content = "Hi, this is a comment..." comment_karma = "0" -comment_approved = "1" +comment_approved = "0" comment_agent = "" comment_type = "" vp_comment_post_ID = "A766C62334614A50B67305B56D1C6EA6" https://sli.do/#wcphadev

37. Formát pro ukládání commit ac33c7943bb2d947d0e9769b70dd2f2cfe56b7c5 Author: admin <jan@voracek.net> Date: Sat Feb 18 01:08:31 2017 +0100 [VP] Unapproved comment for post 'Vítejte!' VP-Action: comment/unapprove/32EB4B4D4D944039818CF9DF3EB73E62 VP-Comment-Author: A WordPress Commenter VP-Comment-PostTitle: Vítejte! X-VP-Version: DEV X-VP-Environment: default --- a/wp-content/vpdb/comments/32/32EB4B4D4D944039818CF9DF3EB73E62.ini +++ b/wp-content/vpdb/comments/32/32EB4B4D4D944039818CF9DF3EB73E62.ini @@ -9,7 +9,7 @@ comment_content = "Hi, this is a comment..." comment_karma = "0" -comment_approved = "1" +comment_approved = "0" comment_agent = "" comment_type = "" vp_comment_post_ID = "A766C62334614A50B67305B56D1C6EA6" https://sli.do/#wcphadev

38. Zobrazení změn v GUI commit ac33c7943bb2d947d0e9769b70dd2f2cfe56b7c5 Author: admin <jan@voracek.net> Date: Sat Feb 18 01:08:31 2017 +0100 [VP] Unapproved comment for post 'Vítejte!' VP-Action: comment/unapprove/32EB4B4D4D944039818CF9DF3EB73E62 VP-Comment-Author: A WordPress Commenter VP-Comment-PostTitle: Vítejte! X-VP-Version: DEV X-VP-Environment: default --- a/wp-content/vpdb/comments/32/32EB4B4D4D944039818CF9DF3EB73E62.ini +++ b/wp-content/vpdb/comments/32/32EB4B4D4D944039818CF9DF3EB73E62.ini @@ -9,7 +9,7 @@ comment_content = "Hi, this is a comment..." comment_karma = "0" -comment_approved = "1" +comment_approved = "0" comment_agent = "" comment_type = "" vp_comment_post_ID = "A766C62334614A50B67305B56D1C6EA6" https://sli.do/#wcphadev

39. https://sli.do/#wcphadev Zobrazení změn v GUI commit ac33c7943bb2d947d0e9769b70dd2f2cfe56b7c5 Author: admin <jan@voracek.net> Date: Sat Feb 18 01:08:31 2017 +0100 [VP] Unapproved comment for post 'Vítejte!' VP-Action: comment/unapprove/32EB4B4D4D944039818CF9DF3EB73E62 VP-Comment-Author: A WordPress Commenter VP-Comment-PostTitle: Vítejte! X-VP-Version: DEV X-VP-Environment: default --- a/wp-content/vpdb/comments/32/32EB4B4D4D944039818CF9DF3EB73E62.ini +++ b/wp-content/vpdb/comments/32/32EB4B4D4D944039818CF9DF3EB73E62.ini @@ -9,7 +9,7 @@ comment_content = "Hi, this is a comment..." comment_karma = "0" -comment_approved = "1" +comment_approved = "0" comment_agent = "" comment_type = "" vp_comment_post_ID = "A766C62334614A50B67305B56D1C6EA6"

40. Zobrazení změn v GUI actions.yml: comment: tags: VP-Comment-PostTitle: / VP-Comment-Author: comment_author actions: create: New comment for post '%VP-Comment-PostTitle%' edit: message: Edited comment for post '%VP-Comment-PostTitle%' priority: 12 delete: Deleted comment for post '%VP-Comment-PostTitle% trash: Comment for post '%VP-Comment-PostTitle%' moved to trash untrash: Comment for post '%VP-Comment-PostTitle%' moved from trash approve: Approved comment for post '%VP-Comment-PostTitle%' unapprove: Unapproved comment for post '%VP-Comment-PostTitle%' https://sli.do/#wcphadev

41. Zobrazení změn v GUI actions.yml: comment: tags: VP-Comment-PostTitle: / VP-Comment-Author: comment_author actions: create: New comment for post '%VP-Comment-PostTitle%' edit: message: Edited comment for post '%VP-Comment-PostTitle%' priority: 12 delete: Deleted comment for post '%VP-Comment-PostTitle% trash: Comment for post '%VP-Comment-PostTitle%' moved to trash untrash: Comment for post '%VP-Comment-PostTitle%' moved from trash approve: Approved comment for post '%VP-Comment-PostTitle%' unapprove: Unapproved comment for post '%VP-Comment-PostTitle%' https://sli.do/#wcphadev

42. Zobrazení změn v GUI comment: tags: VP-Comment-PostTitle: / VP-Comment-Author: comment_author actions: unapprove: Unapproved comment for post '%VP-Comment-PostTitle%' https://sli.do/#wcphadev

43. Zobrazení změn v GUI comment: tags: VP-Comment-PostTitle: / VP-Comment-Author: comment_author actions: unapprove: Unapproved comment for post '%VP-Comment-PostTitle%' Author: admin <jan@voracek.net> Date: Sat Feb 18 01:08:31 2017 +0100 [VP] Unapproved comment for post 'Vítejte!' VP-Action: comment/unapprove/32EB4B4D4D944039818CF9DF3EB73E62 VP-Comment-Author: A WordPress Commenter VP-Comment-PostTitle: Vítejte! https://sli.do/#wcphadev

44. Zobrazení změn v GUI comment: tags: VP-Comment-PostTitle: / VP-Comment-Author: comment_author actions: unapprove: Unapproved comment for post '%VP-Comment-PostTitle%' Author: admin <jan@voracek.net> Date: Sat Feb 18 01:08:31 2017 +0100 [VP] Unapproved comment for post 'Vítejte!' VP-Action: comment/unapprove/32EB4B4D4D944039818CF9DF3EB73E62 VP-Comment-Author: A WordPress Commenter VP-Comment-PostTitle: Vítejte! https://sli.do/#wcphadev

45. Sledování změn Na úrovni DB ◦ Monkey patching wp-db.php / db.php drop-in ◦ create, edit, delete Pomocí filtrů add_filter('vp_entity_action_post', function ($action, $oldEntity, $newEntity) { if ($action === 'edit') { // determine more specific edit action $diff = EntityUtils::getDiff($oldEntity, $newEntity); if (isset($diff['post_status']) && $diff['post_status'] === 'trash') { return 'trash'; } if (isset($diff['post_status']) && $oldEntity['post_status'] === 'trash') { return 'untrash'; } https://sli.do/#wcphadev

46. Rozšiřitelnost VersionPressu schema.yml ◦ DB schéma – tabulky, cizí klíče, ignorované entity, atd. actions.yml ◦ Seznam možných akcí + textová reprezentace shortcodes.yml hooks.php ◦ PHP hooky na WP i VP akce https://sli.do/#wcphadev

47. Tipy pro vývojáře https://sli.do/#wcphadev

48. Tipy pro vývojáře pluginů Nezneužívejte základní tabulky WP Používejte cizí klíče v DB Vytyčte v kódu si jasnou hranici mezi WP a vlastním pluginem Testujte svůj kód Testujte integraci s WP Přečtěte si Clean Code, The Clean Coder, Test Driven Development by Example, Data Modeling Essentials https://sli.do/#wcphadev

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