################################################################################
## Custom Scalar Types
################################################################################

# Date represented as an ISO8601 string.
scalar Date


################################################################################
## Users
################################################################################

# Roles that a user can have, these can be combined.
enum USER_ROLES {

  # an administrator of the site
  ADMIN

  # a moderator of the site
  MODERATOR
}

# Any person who can author comments, create actions, and view comments on a
# stream.
type User {

  # The ID of the User.
  id: ID!

  # Username of a user.
  username: String!

  # Action summaries against the user.
  action_summaries: [ActionSummary]

  # Actions completed on the parent.
  actions: [Action]

  # the current roles of the user.
  roles: [USER_ROLES]

  # determines whether the user can edit their username
  canEditName: Boolean

  # returns all comments based on a query.
  comments(query: CommentsQuery): [Comment]

  # returns user status
  status: USER_STATUS
}

type Tag {
  # the actual tag for the comment.
  name: String!

  # the user that assigned the tag. If NULL then the system automatically tagged it.
  assigned_by: String

  # the time when the tag was assigned.
  created_at: Date!
}

################################################################################
## Comments
################################################################################

# The statuses that a comment may have.
enum COMMENT_STATUS {

  # The comment is not PREMOD, but was not applied a moderation status by a
  # moderator.
  NONE

  # The comment has been accepted by a moderator.
  ACCEPTED

  # The comment has been rejected by a moderator.
  REJECTED

  # The comment was created while the asset's premoderation option was on, and
  # new comments that haven't been moderated yet are referred to as
  # "premoderated" or "premod" comments.
  PREMOD
}

# The types of action there are as enum's.
enum ACTION_TYPE {

  # Represents a LikeAction.
  LIKE

  # Represents a FlagAction.
  FLAG

  # Represents a don't agree action
  DONTAGREE
}

# CommentsQuery allows the ability to query comments by a specific methods.
input CommentsQuery {

  # Current status of a comment. Requires the `ADMIN` role.
  statuses: [COMMENT_STATUS!]

  # Asset that a comment is on.
  asset_id: ID

  # The parent of the comment that we want to retrieve.
  parent_id: ID

  # Comments returned will only be ones which have at least one action of this
  # type. Requires the `ADMIN` role.
  action_type: ACTION_TYPE

  # Limit the number of results to be returned.
  limit: Int = 10

  # Skip results from the last created_at timestamp.
  cursor: Date

  # Filter by a specific tag name.
  tag: [String]

  # Sort the results by created_at.
  sort: SORT_ORDER = REVERSE_CHRONOLOGICAL
}

# CommentCountQuery allows the ability to query comment counts by specific
# methods.
input CommentCountQuery {

  # Current status of a comment. Requires the `ADMIN` role.
  statuses: [COMMENT_STATUS!]

  # Asset that a comment is on.
  asset_id: ID

  # the parent of the comment that we want to retrieve.
  parent_id: ID

  # comments returned will only be ones which have at least one action of this
  # type.
  action_type: ACTION_TYPE

  # Filter by a specific tag name.
  tag: [String]
}

# Comment is the base representation of user interaction in Talk.
type Comment {

  # The parent of the comment (if there is one).
  parent: Comment

  # The ID of the comment.
  id: ID!

  # The actual comment data.
  body: String!

  # the tags on the comment
  tags: [Tag]

  # the user who authored the comment.
  user: User

  # the recent replies made against this comment.
  recentReplies: [Comment]

  # the replies that were made to the comment.
  replies(sort: SORT_ORDER = CHRONOLOGICAL, limit: Int = 3): [Comment]

  # The count of replies on a comment.
  replyCount: Int

  # Actions completed on the parent. Requires the `ADMIN` role.
  actions: [Action]

  # Action summaries against a comment.
  action_summaries: [ActionSummary]

  # The asset that a comment was made on.
  asset: Asset

  # The current status of a comment.
  status: COMMENT_STATUS!

  # The time when the comment was created
  created_at: Date!
}

################################################################################
## Actions
################################################################################

# An action rendered against a parent entity item.
interface Action {

  # The ID of the action.
  id: ID!

  # The author of the action.
  user: User

  # The time when the Action was updated.
  updated_at: Date

  # The time when the Action was created.
  created_at: Date
}

# A summary of actions based on the specific grouping of the group_id.
interface ActionSummary {

  # The count of actions with this group.
  count: Int

  # The current user's action.
  current_user: Action
}

# A summary of actions for a specific action type on an Asset.
interface AssetActionSummary {

  # Number of actions associated with actionable types on this this Asset.
  actionCount: Int

  # Number of unique actionable types that are referenced by the actions.
  actionableItemCount: Int
}

# A summary of counts related to all the Flags on an Asset.
type FlagAssetActionSummary implements AssetActionSummary {

  # Number of flags associated with actionable types on this this Asset.
  actionCount: Int

  # Number of unique actionable types that are referenced by the flags.
  actionableItemCount: Int
}

# A summary of counts related to all the Likes on an Asset.
type LikeAssetActionSummary implements AssetActionSummary {

  # Number of likes associated with actionable types on this this Asset.
  actionCount: Int

  # Number of unique actionable types that are referenced by the likes.
  actionableItemCount: Int
}

# LikeAction is used by users who "like" a specific entity.
type LikeAction implements Action {

  # The ID of the action.
  id: ID!

  # The author of the action.
  user: User

  # The time when the Action was updated.
  updated_at: Date

  # The time when the Action was created.
  created_at: Date
}

# LikeActionSummary is counts the amount of "likes" that a specific entity has.
type LikeActionSummary implements ActionSummary {

  # The count of likes against the parent entity.
  count: Int!

  current_user: LikeAction
}

# A FLAG action that contains flag metadata.
type FlagAction implements Action {

  # The ID of the Flag Action.
  id: ID!

  # The reason for which the Flag Action was created.
  reason: String

  # An optional message sent with the flagging action by the user.
  message: String

  # The user who created the action.
  user: User

  # The time when the Flag Action was updated.
  updated_at: Date

  # The time when the Flag Action was created.
  created_at: Date
}

# A DONTAGREE action that contains do not agree metadata.
type DontAgreeAction implements Action {

  # The ID of the DontAgree Action.
  id: ID!

  # The reason for which the DontAgree Action was created.
  reason: String

  # An optional message sent with the flagging action by the user.
  message: String

  # The user who created the action.
  user: User

  # The time when the DontAgree Action was updated.
  updated_at: Date

  # The time when the DontAgree Action was created.
  created_at: Date
}

# Summary for Flag Action with a a unique reason.
type FlagActionSummary implements ActionSummary {

  # The total count of flags with this reason.
  count: Int!

  # The reason for which the Flag Action was created.
  reason: String

  # The flag by the current user against the parent entity with this reason.
  current_user: FlagAction
}

# Summary for Don't Agree Action with a a unique reason.
type DontAgreeActionSummary implements ActionSummary {

  # The total count of flags with this reason.
  count: Int!

  # The reason for which the Flag Action was created.
  reason: String

  # The don't agree action by the current user against the parent entity with this reason.
  current_user: DontAgreeAction
}

################################################################################
## Settings
################################################################################

# The moderation mode of the site.
enum MODERATION_MODE {

  # Comments posted while in `PRE` mode will be labeled with a `PREMOD`
  # status and will require a moderator decision before being visible.
  PRE

  # Comments posted while in `POST` will be visible immediately.
  POST
}

# Site wide global settings.
type Settings {

  # Moderation mode for the site.
  moderation: MODERATION_MODE!

  # Enables a requirement for email confirmation before a user can login.
  requireEmailConfirmation: Boolean

  infoBoxEnable: Boolean
  infoBoxContent: String
  premodLinksEnable: Boolean
  questionBoxEnable: Boolean
  questionBoxContent: String
  closeTimeout: Int
  closedMessage: String
  charCountEnable: Boolean
  charCount: Int

}

################################################################################
## Assets
################################################################################

# Where comments are made on.
type Asset {

  # The current ID of the asset.
  id: ID!

  # The scraped title of the asset.
  title: String

  # The URL that the asset is located on.
  url: String

  # Returns recent comments
  recentComments: [Comment]

  # The top level comments that are attached to the asset.
  comments(sort: SORT_ORDER = REVERSE_CHRONOLOGICAL, limit: Int = 10): [Comment]

  # The count of top level comments on the asset.
  commentCount: Int

  # The total count of all comments made on the asset.
  totalCommentCount: Int

  # The settings (rectified with the global settings) that should be applied to
  # this asset.
  settings: Settings!

  # The date that the asset was closed at.
  closedAt: Date

  # Summary of all Actions against all entities associated with the Asset.
  # (likes, flags, etc.). Requires the `ADMIN` role.
  action_summaries: [AssetActionSummary]

  # The date that the asset was created.
  created_at: Date

  # The author(s) of the asset.
  author: String
}

################################################################################
## Errors
################################################################################

# Any error rendered due to the user's input.
interface UserError {

  # Translation key relating to a translatable string containing details to be
  # displayed to the end user.
  translation_key: String!
}

# A generic error not related to validation reasons.
type GenericUserError implements UserError {

  # Translation key relating to a translatable string containing details to be
  # displayed to the end user.
  translation_key: String!
}

# A validation error that affects the input.
type ValidationUserError implements UserError {

  # Translation key relating to a translatable string containing details to be
  # displayed to the end user.
  translation_key: String!

  # The field in question that caused the error.
  field_name: String!
}

################################################################################
## Queries;
################################################################################

# Establishes the ordering of the content by their created_at time stamp.
enum SORT_ORDER {

  # newest to oldest order.
  REVERSE_CHRONOLOGICAL

  # oldest to newer order.
  CHRONOLOGICAL
}

# All queries that can be executed.
enum USER_STATUS {
  ACTIVE
  BANNED
  PENDING
  APPROVED
}

# Metrics for the assets.
enum ASSET_METRICS_SORT {

  # Represents a LikeAction.
  LIKE

  # Represents a FlagAction.
  FLAG

  # Represents a don't agree action.
  DONTAGREE

  # Represents activity.
  ACTIVITY
}

type RootQuery {

  # Site wide settings and defaults.
  settings: Settings

  # Finds a specific comment based on it's id.
  comment(id: ID!): Comment

  # All assets. Requires the `ADMIN` role.
  assets: [Asset]

  # Find or create an asset by url, or just find with the ID.
  asset(id: ID, url: String): Asset

  # Comments returned based on a query.
  comments(query: CommentsQuery!): [Comment]

  # Return the count of comments satisfied by the query. Note that this edge is
  # expensive as it is not batched. Requires the `ADMIN` role.
  commentCount(query: CommentCountQuery!): Int

  # The currently logged in user based on the request. Requires any logged in
  # role.
  me: User

  # Asset metrics related to user actions are saturated into the assets
  # returned.
  assetMetrics(from: Date!, to: Date!, sort: ASSET_METRICS_SORT!, limit: Int = 10): [Asset!]

  # Comment metrics related to user actions are saturated into the comments
  # returned.
  commentMetrics(from: Date!, to: Date!, sort: ACTION_TYPE!, limit: Int = 10): [Comment!]
}

################################################################################
## Mutations
################################################################################

# Response defines what can be expected from any response to a mutation action.
interface Response {

  # An array of errors relating to the mutation that occurred.
  errors: [UserError]
}

# CreateCommentResponse is returned with the comment that was created and any
# errors that may have occurred in the attempt to create it.
type CreateCommentResponse implements Response {

  # The comment that was created.
  comment: Comment

  # An array of errors relating to the mutation that occurred.
  errors: [UserError]
}

# Used to represent the item type for an action.
enum ACTION_ITEM_TYPE {

  # The action references a entity of type Asset.
  ASSETS

  # The action references a entity of type Comment.
  COMMENTS

  # The action references a entity of type User.
  USERS
}

input CreateLikeInput {

  # The item's id for which we are to create a like.
  item_id: ID!

  # The type of the item for which we are to create the like.
  item_type: ACTION_ITEM_TYPE!
}

type CreateLikeResponse implements Response {

  # The like that was created.
  like: LikeAction

  # An array of errors relating to the mutation that occurred.
  errors: [UserError]
}

input CreateFlagInput {

  # The item's id for which we are to create a flag.
  item_id: ID!

  # The type of the item for which we are to create the flag.
  item_type: ACTION_ITEM_TYPE!

  # The reason for flagging the item.
  reason: String!

  # An optional message sent with the flagging action by the user.
  message: String
}

# CreateFlagResponse is the response returned with possibly some errors
# relating to the creating the flag action attempt and possibly the flag that
# was created.
type CreateFlagResponse implements Response {

  # The flag that was created.
  flag: FlagAction

  # An array of errors relating to the mutation that occurred.
  errors: [UserError]
}


# CreateDontAgreeResponse is the response returned with possibly some errors
# relating to the creating the don't agree action attempt and possibly the don't agree that
# was created.
type CreateDontAgreeResponse implements Response {

  # The don't agree that was created.
  dontagree: DontAgreeAction

  # An array of errors relating to the mutation that occurred.
  errors: [UserError]
}

input CreateDontAgreeInput {

  # The item's id for which we are to create a don't agree.
  item_id: ID!

  # The type of the item for which we are to create the don't agree.
  item_type: ACTION_ITEM_TYPE!

  # The reason for not agreeing with the item.
  reason: String

  # An optional message sent with the don't agree action by the user.
  message: String
}

# DeleteActionResponse is the response returned with possibly some errors
# relating to the delete action attempt.
type DeleteActionResponse implements Response {

  # An array of errors relating to the mutation that occurred.
  errors: [UserError]
}

# SetUserStatusResponse is the response returned with possibly some errors
# relating to the delete action attempt.
type SetUserStatusResponse implements Response {

  # An array of errors relating to the mutation that occurred.
  errors: [UserError]
}

# SetCommentStatusResponse is the response returned with possibly some errors
# relating to the delete action attempt.
type SetCommentStatusResponse implements Response {

  # An array of errors relating to the mutation that occurred.
  errors: [UserError]
}

# Response to addCommentTag mutation
type AddCommentTagResponse implements Response {
  # An array of errors relating to the mutation that occured.
  comment: Comment
  errors: [UserError]
}

# Response to removeCommentTag mutation
type RemoveCommentTagResponse implements Response {
  # An array of errors relating to the mutation that occured.
  comment: Comment
  errors: [UserError]
}

# All mutations for the application are defined on this object.
type RootMutation {

  # Creates a comment on the asset.
  createComment(asset_id: ID!, parent_id: ID, body: String!): CreateCommentResponse

  # Creates a like on an entity.
  createLike(like: CreateLikeInput!): CreateLikeResponse

  # Creates a flag on an entity.
  createFlag(flag: CreateFlagInput!): CreateFlagResponse

  # Creates a don't agree action on an entity.
  createDontAgree(dontagree: CreateDontAgreeInput!): CreateDontAgreeResponse

  # Delete an action based on the action id.
  deleteAction(id: ID!): DeleteActionResponse

  # Sets User status. Requires the `ADMIN` role.
  setUserStatus(id: ID!, status: USER_STATUS!): SetUserStatusResponse

  # Sets Comment status. Requires the `ADMIN` role.
  setCommentStatus(id: ID!, status: COMMENT_STATUS!): SetCommentStatusResponse

  # Add tag to comment.
  addCommentTag(id: ID!, tag: String!): AddCommentTagResponse

  # Remove tag from comment.
  removeCommentTag(id: ID!, tag: String!): RemoveCommentTagResponse
}

################################################################################
## Schema
################################################################################

schema {
  query: RootQuery
  mutation: RootMutation
}