doc: Added database diagram to documentation

README.md

@@ -146,6 +146,10 @@ A Postman's collection can be found [here](postman-collection/).
 
 To try out our product, you can use our [demo](https://demo.lokapp.io).
 
+## Database model
+
+![Database Diagram](./documentation/database-model.png)
+
 ## License
 
 Distributed under the Apache 2.0 License. See `LICENSE` for more information.

documentation/database-model.puml

@@ -0,0 +1,91 @@
+@startuml
+!include dbdiagramtheme.puml
+
+table( projects ) #header:07198C {
+  primary_key( id, integer )
+  column( name, "character varying", true )
+  column( description, "character varying" )
+  column( color, "character varying", true )
+  column( createdAt, timestamp, true ) 
+  column( updatedAt, timestamp, true ) 
+}
+
+table( users ) #header:F39C1B {
+  primary_key( id, "character varying" )
+  column( username, "character varying" )
+  column( email, "character varying", true )
+  column( createdAt, timestamp, true ) 
+  column( updatedAt, timestamp, true ) 
+}
+
+table( invitations ) #header:F39C1B {
+  primary_key( id, integer )
+  foreign_key( projectId, integer )
+  foreign_key( ownerId, "character varying" )
+  foreign_key( guestId, "character varying" )
+  column( role, "character varying", true )
+  column( createdAt, timestamp )
+  column( sourceLanguagesIds, "character varying" )
+  column( targetLanguagesIds, "character varying" )
+}
+
+table( users_projects ) #header:F39C1B {
+  primary_key( projectId, integer )
+  primary_key( userId, "character varying" )
+  column( role, "character varying", true )
+  column( createdAt, timestamp )
+  column( sourceLanguagesIds, "character varying" )
+  column( targetLanguagesIds, "character varying" )
+}
+
+table( groups ) {
+  primary_key( id, integer )
+  foreign_key( projectId, integer, false )
+  column( name, "character varying", true )
+  column( createdAt, timestamp, true ) 
+  column( updatedAt, timestamp, true ) 
+}
+
+table( project_languages ) {
+  primary_key( id, integer )
+  foreign_key( projectId, integer )
+  column( name, "character varying", true )
+  column( createdAt, timestamp, true ) 
+  column( updatedAt, timestamp, true ) 
+  column( isRtl, boolean, true )
+}
+
+table( translation_keys ) #header:C0392A {
+  primary_key( id, integer )
+  foreign_key( projectId, integer )
+  foreign_key( groupId, integer, false )
+  column( name, "character varying", true )
+  column( isPlural, boolean, true )
+  column( createdAt, timestamp, true ) 
+  column( updatedAt, timestamp, true ) 
+}
+
+table( translation_values ) #header:C0392A {
+  primary_key( id, integer )
+  column( name, "character varying", true )
+  column( quantityString, "character varying", true )
+  column( createdAt, timestamp, true ) 
+  column( updatedAt, timestamp, true ) 
+  foreign_key( keyId, integer )
+  foreign_key( languageId, integer )
+  column( status, "character varying", true ) 
+}
+
+invitations::ownerId }|-- users::id
+invitations::guestId }|-- users::id
+invitations::projectId }|-- projects::id
+users_projects::userId }|-- users::id
+users_projects::projectId }|-- projects::id
+groups::projectId }|-- projects::id
+translation_keys::groupId }|-- groups::id
+translation_keys::projectId }|-- projects::id
+project_languages::projectId }|-- projects::id
+translation_values::keyId }|-- translation_keys::id
+translation_values::languageId }|-- project_languages::id
+
+@enduml

documentation/dbdiagramtheme.puml

@@ -0,0 +1,41 @@
+@startuml
+left to right direction
+skinparam roundcorner 10
+skinparam shadowing false
+skinparam handwritten false
+skinparam BackgroundColor #44444D
+skinparam class {
+    FontColor white
+    AttributeFontColor white
+    BackgroundColor #38383F
+    ArrowColor white
+    BorderColor #38383F
+    HeaderBackgroundColor #232323
+    HeaderFontStyle bold
+}
+
+!define table(x) entity x << (T, white) >>
+
+!function primary_key($name, $type, $nonnull=true)
+  !$nn = ""
+  !if ($nonnull == true) 
+    !$nn = "<<NN>>"
+  !endif
+  !return "<b><color:#b8861b><&key></color> " + $name + ": " + $type + " <<PK>> " + $nn + "</b>"
+!endfunction
+!function foreign_key($name, $type, $nonnull=true)
+  !$nn = ""
+  !if ($nonnull == true) 
+    !$nn = "<<NN>>"
+  !endif
+  !return "<color:#aaaaaa><&key></color> " + $name + ": " + $type + " <<FK>> " + $nn
+!endfunction
+!function column($name, $type, $nonnull=false)
+  !$nn = ""
+  !if ($nonnull == true) 
+    !$nn = "<<NN>>"
+  !endif
+  !return "<color:#efefef><&media-record></color> " + $name + ": " + $type + " " + $nn
+!endfunction
+
+@enduml