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defmodule ShardURI do
@moduledoc"""
Convert Shard manifests to and from text strings. Not used by the shard library
internally, only provided for convenience.
"""
@doc"""
Get URI corresponding to shard manifest.
"""
def from_manifest(m) do
case m do
%SApp.Chat.Manifest{channel: chan} -> "shard:chat:#{chan}"
%SApp.Chat.PrivChat.Manifest{pk_list: pk_list} ->
"shard:privchat:#{pk_list|>Enum.map(&Base.encode16/1)|>Enum.join(",")}"
%SApp.Identity.Manifest{pk: pk} ->
"shard:identity:#{pk|>Base.encode16}"
%SApp.Directory.Manifest{owner: owner, public: true, name: name} ->
"shard:dir:pub:#{owner|>Base.encode16}:#{name}"
%SApp.Directory.Manifest{owner: owner, public: false, name: name} ->
"shard:dir:priv:#{owner|>Base.encode16}:#{name}"
%SApp.File.Manifest{infohash: infohash} ->
"shard:file:#{infohash|>Base.encode16}"
end
end
@doc"""
Parse URI and return corresponding manifest.
"""
def to_manifest(p) do
case p do
"shard:chat:" <> chan ->
%SApp.Chat.Manifest{channel: chan}
"shard:privchat:" <> pklist ->
pklist
|> String.split(",")
|> Enum.map(&parse_pk/1)
|> SApp.Chat.PrivChat.Manifest.new()
"shard:identity:" <> pk ->
%SApp.Identity.Manifest{pk: parse_pk pk}
"shard:dir:pub:" <> <<pk::bytes-size(64)>> <> ":" <> name ->
%SApp.Directory.Manifest{owner: parse_pk(pk), public: true, name: name}
"shard:dir:priv:" <> <<pk::bytes-size(64)>> <> ":" <> name ->
%SApp.Directory.Manifest{owner: parse_pk(pk), public: false, name: name}
"shard:file:" <> <<infohash::bytes-size(64)>> ->
%SApp.File.Manifest{infohash: Base.decode16!(infohash)}
end
end
def parse_pk(pkstr) do
64 = byte_size pkstr
Base.decode16! pkstr
end
end
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