Design and basic implementation of the model.

LICENSE

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README.md

@@ -3,3 +3,6 @@
 The ShortForm (`shortform`) project is a web application designed for 
 presenting and facilitating discussion for essays, articles, or general user to 
 user interactions.
+
+- [ADRs](./adr): Read about the ShortForm design.
+- [License](./LICENSE): Apache 2.0

adr/2023-11-26-shortform-data-model.md

@@ -0,0 +1,129 @@
+# ADR 2023-11-26: ShortForm Data Model
+
+## Table of Contents
+
+- [Context](#context)
+- [Decision](#decision)
+- [Relational Data Model](#relational-data-model)
+    - [Table: `content`](#table-content)
+    - [Table: `comments`](#table-comments)
+    - [Table: `assets`](#table-assets)
+    - [Table: `tags`](#table-tags)
+    - [Table: `content_tags`](#table-content_tags)
+    - [Table: `asset_tags`](#table-asset_tags)
+- [Disk Data Model](#disk-data-model)
+
+## Context
+
+ShortForm is a project intended to help facilitate discussion of interesting 
+topics among groups of people. Some person posts a prompt, essay, article, or
+some other piece of content and others engage in discussion. While most content
+is textual, ShortForm supports some set of static assets as well. Note that
+ShortForm only allows assets to be uploaded and presented by approved posters.
+Comments may only include text.
+
+## Decision
+
+- Adopt a relational data model that references content stored in some static 
+  file storage mechanism such as a local disk or S3.
+- Support comments.
+- ShortForm must support multiple backing storage mechanisms.
+- Support arbitrary file upload and download.
+
+## Relational Data Model
+
+- [Table: `content`](#table-content)
+- [Table: `comments`](#table-comments)
+- [Table: `assets`](#table-assets)
+- [Table: `tags`](#table-tags)
+- [Table: `content_tags`](#table-content_tags)
+- [Table: `asset_tags`](#table-asset_tags)
+
+### Table: `content`
+
+```sql
+CREATE TABLE content(
+    id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+    external_id UUID NOT NULL UNIQUE,
+    created_at TIMESTAMPTZ NOT NULL,
+    created_by BIGINT NOT NULL,
+    title TEXT NOT NULL,
+    hash TEXT NOT NULL
+);
+```
+
+### Table: `comments`
+
+```sql
+CREATE TABLE comments(
+    id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+    external_id UUID NOT NULL UNIQUE,
+    created_at TIMESTAMPTZ NOT NULL,
+    created_by BIGINT NOT NULL,
+    content TEXT NOT NULL,
+    parent BIGINT NULL,
+);
+```
+
+Comments store their content directly. Comments are not complex, and are 
+typically shorter than primary content. The practical limit for PostgreSQL is
+1gb per row, but ShortForm imposes a configurable limit (10kb by default).
+
+### Table: `assets`
+
+```sql
+CREATE TABLE assets(
+    id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+    external_id UUID NOT NULL UNIQUE,
+    created_at TIMESTAMPTZ NOT NULL,
+    created_by BIGINT NOT NULL,
+    mime TEXT NOT NULL,
+    title TEXT NOT NULL,
+    extension TEXT NOT NULL,
+    hash TEXT NOT NULL
+);
+```
+
+### Table: `tags`
+
+```sql
+CREATE TABLE tags(
+    id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+    value TEXT NOT NULL UNIQUE
+);
+```
+
+Tags are arbitrary labels that authors may assign to top level posts and assets.
+
+### Table: `content_tags`
+
+```sql
+CREATE TABLE content_tags(
+    content_id BIGINT NOT NULL,
+    tag_id BIGINT NOT NULL,
+    PRIMARY KEY(content_id, tag_id)
+);
+```
+
+### Table: `asset_tags`
+
+```sql
+CREATE TABLE asset_tags(
+    asset_id BIGINT NOT NULL,
+    tag_id BIGINT NOT NULL,
+    PRIMARY KEY(asset_id, tag_id)
+)
+```
+
+## Disk Data Model
+
+- The directory structure (path structure) is based on year, month, day.
+- Within each day, one file exists per piece of content created on that day.
+
+**Example**:
+
+```
+/2023/11/26/0e61ae14cc1f444cb5cbe48f0c301193.md
+/2023/11/26/0e61ae14cc1f444cb5cbe48f0c301193.html
+/2023/11/26/99ebf96760ba498798652ee4140a9f3e.png
+```

adr/2023-11-27-shortform-user-model.md

@@ -0,0 +1,74 @@
+# ADR 2023-11-27: ShortForm User Model
+
+## Table of Contents
+
+- [Context](#context)
+- [Decision](#decision)
+
+## Context
+
+ShortForm is a project intended to help facilitate discussion of interesting 
+topics among groups of people. Some person posts a prompt, essay, article, or
+some other piece of content and others engage in discussion.
+
+This application depends on the concept of a _user_. ShortForm has users who are
+allowed to post articles and upload assets, as well as the more-numerous user
+category which is allowed to post comments on content. Comments are the primary
+discussion forum of ShortForm.
+
+## Decision
+
+Keep scope tight for the initial build of ShortForm.
+
+- Support two types of users: posters and commenters.
+- Do not support registration - administrators in control of the server must add
+  users by hand.
+- Users have a username and a password.
+- New accounts cannot be used until users supply a password.
+- New accounts receive their initial password via the password reset mechanism.
+- The password reset mechanism for an account must be initiated by an admin.
+- Manage user accounts in the ShortForm database.
+- Use Argon2 for password encryption.
+
+These restrictions allow ShortForm to work as intended while remaining light on
+features initially, serving a small community that communicates directly outside
+of ShortForm.
+
+## Relational Data Model
+
+### Enum Type: `user_role`
+
+```sql
+CREATE TYPE user_role AS ENUM ('poster', 'commenter');
+```
+
+### Enum Type: `user_status`
+
+```sql
+CREATE TYPE user_status AS ENUM ('active', 'locked', 'initializing');
+```
+
+### Table: `users`
+
+```sql
+CREATE TABLE users(
+    id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+    created_at TIMESTAMPTZ NOT NULL,
+    username TEXT NOT NULL UNIQUE,
+    password TEXT NOT NULL,
+    role user_role NOT NULL,
+    status user_status NOT NULL
+);
+```
+
+### Table: `password_resets`
+
+```sql
+CREATE TABLE password_resets(
+    id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
+    created_at TIMESTAMPTZ NOT NULL,
+    expires_at TIMESTAMPTZ NOT NULL,
+    token TEXT NOT NULL,
+    used BOOLEAN NOT NULL
+);
+```

adr/README.md

@@ -0,0 +1,4 @@
+# Architecture Decision Records (ADRs)
+
+- [2023-11-26: ShortForm Data Model](./2023-11-26-shortform-data-model.md)
+- [2023-11-27: ShortForm User Model](./2023-11-27-shortform-user-model.md)

build.sbt

@@ -102,7 +102,7 @@ lazy val shortform = (project in file("."))
     crypto,
     model,
     db,
-    api
+    app
    )
   .settings(sharedSettings)
   .settings(name := "shortform")
@@ -181,11 +181,11 @@ lazy val `db-integration-tests` = project
     )
   )
 
-lazy val api = project
-  .in(file("modules/api"))
+lazy val app = project
+  .in(file("modules/app"))
   .enablePlugins(JavaServerAppPackaging)
   .dependsOn(uuid, error, crypto, model, db)
-  .settings(name := s"$ProjectName-api")
+  .settings(name := s"$ProjectName-app")
   .settings(sharedSettings)
   .settings(testSettings)
   .settings(

modules/model/src/main/scala/gs/shortform/model/Content.scala

@@ -0,0 +1,25 @@
+package gs.shortform.model
+
+import gs.uuid.UUID
+import gs.shortform.crypto.Hash
+
+/**
+  * Represents a top level piece of content - an article, essay, prompt, or some
+  * other written piece of work. All content must have a [[Title]] for display
+  * purposes.
+  *
+  * Content cannot currently be edited.
+  *
+  * @param externalId Globally unique identifier for this content.
+  * @param createdAt Instant this content was created.
+  * @param createdBy User who created this content.
+  * @param title Display title for this content.
+  * @param hash Hash of the primary rendered file for this content.
+  */
+case class Content(
+  externalId: UUID,
+  createdAt: CreatedAt,
+  createdBy: CreatedBy,
+  title: Title, 
+  hash: Hash
+)

modules/model/src/main/scala/gs/shortform/model/CreatedAt.scala

@@ -0,0 +1,26 @@
+package gs.shortform.model
+
+import java.time.Instant
+import java.time.OffsetDateTime
+import java.time.ZoneOffset
+
+/**
+  * Represents the instant some resource was created.
+  */
+opaque type CreatedAt = Instant
+
+object CreatedAt:
+
+  def apply(value: Instant): CreatedAt = value
+
+  def fromOffsetDateTime(value: OffsetDateTime): CreatedAt = value.toInstant()
+
+  given CanEqual[CreatedAt, CreatedAt] = CanEqual.derived
+
+  extension (createdAt: CreatedAt)
+    def toInstant(): Instant = createdAt
+
+    def toOffsetDateTime(): OffsetDateTime = 
+      toInstant().atOffset(ZoneOffset.UTC)
+
+end CreatedAt

modules/model/src/main/scala/gs/shortform/model/CreatedBy.scala

@@ -0,0 +1,18 @@
+package gs.shortform.model
+
+/**
+  * Username of the user who created some resource.
+  */
+opaque type CreatedBy = String
+
+object CreatedBy:
+
+  // TODO: Create from username.
+  def apply(value: String): CreatedBy = value
+
+  given CanEqual[CreatedBy, CreatedBy] = CanEqual.derived
+
+  extension (createdBy: CreatedBy)
+    def str(): String = createdBy
+
+end CreatedBy

modules/model/src/main/scala/gs/shortform/model/Title.scala

@@ -0,0 +1,18 @@
+package gs.shortform.model
+
+/**
+  * The descriptive title for some resource.
+  */
+opaque type Title = String
+
+object Title:
+
+  def apply(value: String): Title = value
+
+  given CanEqual[Title, Title] = CanEqual.derived
+
+  extension (title: Title)
+    def str(): String = title
+
+end Title
+