syntax = "proto3";

package memos.api.v1;

import "google/api/annotations.proto";

option go_package = "gen/api/v1";

service MarkdownService {
  // Parses the given markdown content and returns a list of nodes.
  rpc ParseMarkdown(ParseMarkdownRequest) returns (ParseMarkdownResponse) {
    option (google.api.http) = {
      post: "/api/v1/markdown/parse"
      body: "*"
    };
  }
  // Restores the given nodes to markdown content.
  rpc RestoreMarkdown(RestoreMarkdownRequest) returns (RestoreMarkdownResponse) {
    option (google.api.http) = {
      post: "/api/v1/markdown:restore"
      body: "*"
    };
  }
  // GetLinkMetadata returns metadata for a given link.
  rpc GetLinkMetadata(GetLinkMetadataRequest) returns (LinkMetadata) {
    option (google.api.http) = {get: "/api/v1/markdown/link:metadata"};
  }
}

message ParseMarkdownRequest {
  string markdown = 1;
}

message ParseMarkdownResponse {
  repeated Node nodes = 1;
}

message RestoreMarkdownRequest {
  repeated Node nodes = 1;
}

message RestoreMarkdownResponse {
  string markdown = 1;
}

message GetLinkMetadataRequest {
  string link = 1;
}

message LinkMetadata {
  string title = 1;
  string description = 2;
  string image = 3;
}

enum NodeType {
  NODE_UNSPECIFIED = 0;
  LINE_BREAK = 1;
  PARAGRAPH = 2;
  CODE_BLOCK = 3;
  HEADING = 4;
  HORIZONTAL_RULE = 5;
  BLOCKQUOTE = 6;
  ORDERED_LIST = 7;
  UNORDERED_LIST = 8;
  TASK_LIST = 9;
  MATH_BLOCK = 10;
  TABLE = 11;
  EMBEDDED_CONTENT = 12;
  TEXT = 13;
  BOLD = 14;
  ITALIC = 15;
  BOLD_ITALIC = 16;
  CODE = 17;
  IMAGE = 18;
  LINK = 19;
  AUTO_LINK = 20;
  TAG = 21;
  STRIKETHROUGH = 22;
  ESCAPING_CHARACTER = 23;
  MATH = 24;
  HIGHLIGHT = 25;
  SUBSCRIPT = 26;
  SUPERSCRIPT = 27;
  REFERENCED_CONTENT = 28;
  SPOILER = 29;
  HTML_ELEMENT = 30;
}

message Node {
  NodeType type = 1;
  oneof node {
    LineBreakNode line_break_node = 2;
    ParagraphNode paragraph_node = 3;
    CodeBlockNode code_block_node = 4;
    HeadingNode heading_node = 5;
    HorizontalRuleNode horizontal_rule_node = 6;
    BlockquoteNode blockquote_node = 7;
    OrderedListNode ordered_list_node = 8;
    UnorderedListNode unordered_list_node = 9;
    TaskListNode task_list_node = 10;
    MathBlockNode math_block_node = 11;
    TableNode table_node = 12;
    EmbeddedContentNode embedded_content_node = 13;
    TextNode text_node = 14;
    BoldNode bold_node = 15;
    ItalicNode italic_node = 16;
    BoldItalicNode bold_italic_node = 17;
    CodeNode code_node = 18;
    ImageNode image_node = 19;
    LinkNode link_node = 20;
    AutoLinkNode auto_link_node = 21;
    TagNode tag_node = 22;
    StrikethroughNode strikethrough_node = 23;
    EscapingCharacterNode escaping_character_node = 24;
    MathNode math_node = 25;
    HighlightNode highlight_node = 26;
    SubscriptNode subscript_node = 27;
    SuperscriptNode superscript_node = 28;
    ReferencedContentNode referenced_content_node = 29;
    SpoilerNode spoiler_node = 30;
    HTMLElementNode html_element_node = 31;
  }
}

message LineBreakNode {}

message ParagraphNode {
  repeated Node children = 1;
}

message CodeBlockNode {
  string language = 1;
  string content = 2;
}

message HeadingNode {
  int32 level = 1;
  repeated Node children = 2;
}

message HorizontalRuleNode {
  string symbol = 1;
}

message BlockquoteNode {
  repeated Node children = 1;
}

message OrderedListNode {
  string number = 1;
  int32 indent = 2;
  repeated Node children = 3;
}

message UnorderedListNode {
  string symbol = 1;
  int32 indent = 2;
  repeated Node children = 3;
}

message TaskListNode {
  string symbol = 1;
  int32 indent = 2;
  bool complete = 3;
  repeated Node children = 4;
}

message MathBlockNode {
  string content = 1;
}

message TableNode {
  repeated Node header = 1;
  repeated string delimiter = 2;

  message Row {
    repeated Node cells = 1;
  }
  repeated Row rows = 3;
}

message EmbeddedContentNode {
  string resource_name = 1;
  string params = 2;
}

message TextNode {
  string content = 1;
}

message BoldNode {
  string symbol = 1;
  repeated Node children = 2;
}

message ItalicNode {
  string symbol = 1;
  string content = 2;
}

message BoldItalicNode {
  string symbol = 1;
  string content = 2;
}

message CodeNode {
  string content = 1;
}

message ImageNode {
  string alt_text = 1;
  string url = 2;
}

message LinkNode {
  string text = 1;
  string url = 2;
}

message AutoLinkNode {
  string url = 1;
  bool is_raw_text = 2;
}

message TagNode {
  string content = 1;
}

message StrikethroughNode {
  string content = 1;
}

message EscapingCharacterNode {
  string symbol = 1;
}

message MathNode {
  string content = 1;
}

message HighlightNode {
  string content = 1;
}

message SubscriptNode {
  string content = 1;
}

message SuperscriptNode {
  string content = 1;
}

message ReferencedContentNode {
  string resource_name = 1;
  string params = 2;
}

message SpoilerNode {
  string content = 1;
}

message HTMLElementNode {
  string tag_name = 1;
  map<string, string> attributes = 2;
}