107 lines
1.9 KiB
Elixir
107 lines
1.9 KiB
Elixir
defmodule Content.Comments do
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@moduledoc """
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Functions for presenting comments on the site.
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"""
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import Ecto.Query, warn: false
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alias Content.Comment
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alias Content.Repo
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def children(parent_comment_id, array_of_comments) do
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array_of_comments
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|> Enum.filter(&(&1.comment_parent == parent_comment_id))
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end
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@doc """
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Returns the list of comments.
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## Examples
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iex> list_comments()
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[%Comment{}, ...]
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"""
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def list_comments do
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Repo.all(Comment)
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end
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@doc """
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Gets a single comment.
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Raises `Ecto.NoResultsError` if the comment does not exist.
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## Examples
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iex> get_comment!(123)
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%Comment{}
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iex> get_comment!(456)
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** (Ecto.NoResultsError)
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"""
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def get_comment!(id), do: Repo.get!(Comment, id)
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@doc """
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Creates a comment.
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## Examples
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iex> create_comment(%{field: value})
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{:ok, %Comment{}}
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iex> create_comment(%{field: bad_value})
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{:error, %Ecto.Changeset{}}
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"""
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def create_comment(attrs \\ %{}) do
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%Comment{}
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|> Comment.changeset(attrs)
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|> Repo.insert()
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end
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@doc """
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Updates a comment.
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## Examples
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iex> update_comment(comment, %{field: new_value})
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{:ok, %Comment{}}
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iex> update_comment(comment, %{field: bad_value})
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{:error, %Ecto.Changeset{}}
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"""
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def update_comment(%Comment{} = comment, attrs) do
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comment
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|> Comment.changeset(attrs)
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|> Repo.update()
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end
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@doc """
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Deletes a Comment.
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## Examples
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iex> delete_comment(comment)
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{:ok, %Comment{}}
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iex> delete_comment(comment)
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{:error, %Ecto.Changeset{}}
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"""
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def delete_comment(%Comment{} = comment) do
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Repo.delete(comment)
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end
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@doc """
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Returns an `%Ecto.Changeset{}` for tracking comment changes.
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## Examples
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iex> change_comment(comment)
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%Ecto.Changeset{source: %Comment{}}
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"""
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def change_comment(%Comment{} = comment) do
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Comment.changeset(comment, %{})
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end
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end
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