function writeNode()

in packages/libs/codegen/src/yaml-dump/yaml-dump.ts [843:946]

• 80 lines of code
• 37 McCabe index (conditional complexity)

function writeNode(state, level, object, block, compact, iskey, isblockseq) {
  state.tag = null;
  state.dump = object;

  if (!detectType(state, object, false)) {
    detectType(state, object, true);
  }

  const type = _toString.call(state.dump);
  const inblock = block;
  let tagStr;

  if (block) {
    block = state.flowLevel < 0 || state.flowLevel > level;
  }

  let objectOrArray = type === "[object Object]" || type === "[object Array]",
    duplicateIndex,
    duplicate;

  if (objectOrArray) {
    duplicateIndex = state.duplicates.indexOf(object);
    duplicate = duplicateIndex !== -1;
  }

  if ((state.tag !== null && state.tag !== "?") || duplicate || (state.indent !== 2 && level > 0)) {
    compact = false;
  }

  if (duplicate && state.usedDuplicates[duplicateIndex]) {
    state.dump = "*ref_" + duplicateIndex;
  } else {
    if (objectOrArray && duplicate && !state.usedDuplicates[duplicateIndex]) {
      state.usedDuplicates[duplicateIndex] = true;
    }
    if (type === "[object Object]") {
      if (block && Object.keys(state.dump).length !== 0) {
        writeBlockMapping(state, level, state.dump, compact);
        if (duplicate) {
          state.dump = "&ref_" + duplicateIndex + state.dump;
        }
      } else {
        writeFlowMapping(state, level, state.dump);
        if (duplicate) {
          state.dump = "&ref_" + duplicateIndex + " " + state.dump;
        }
      }
    } else if (type === "[object Array]") {
      if (block && state.dump.length !== 0) {
        if (state.noArrayIndent && !isblockseq && level > 0) {
          writeBlockSequence(state, level - 1, state.dump, compact);
        } else {
          writeBlockSequence(state, level, state.dump, compact);
        }
        if (duplicate) {
          state.dump = "&ref_" + duplicateIndex + state.dump;
        }
      } else {
        writeFlowSequence(state, level, state.dump);
        if (duplicate) {
          state.dump = "&ref_" + duplicateIndex + " " + state.dump;
        }
      }
    } else if (type === "[object String]") {
      if (state.tag !== "?") {
        writeScalar(state, state.dump, level, iskey, inblock);
      }
    } else if (type === "[object Undefined]") {
      return false;
    } else {
      if (state.skipInvalid) return false;
      throw new YAMLException("unacceptable kind of an object to dump " + type);
    }

    if (state.tag !== null && state.tag !== "?") {
      // Need to encode all characters except those allowed by the spec:
      //
      // [35] ns-dec-digit    ::=  [#x30-#x39] /* 0-9 */
      // [36] ns-hex-digit    ::=  ns-dec-digit
      //                         | [#x41-#x46] /* A-F */ | [#x61-#x66] /* a-f */
      // [37] ns-ascii-letter ::=  [#x41-#x5A] /* A-Z */ | [#x61-#x7A] /* a-z */
      // [38] ns-word-char    ::=  ns-dec-digit | ns-ascii-letter | “-”
      // [39] ns-uri-char     ::=  “%” ns-hex-digit ns-hex-digit | ns-word-char | “#”
      //                         | “;” | “/” | “?” | “:” | “@” | “&” | “=” | “+” | “$” | “,”
      //                         | “_” | “.” | “!” | “~” | “*” | “'” | “(” | “)” | “[” | “]”
      //
      // Also need to encode '!' because it has special meaning (end of tag prefix).
      //
      tagStr = encodeURI(state.tag[0] === "!" ? state.tag.slice(1) : state.tag).replace(/!/g, "%21");

      if (state.tag[0] === "!") {
        tagStr = "!" + tagStr;
      } else if (tagStr.slice(0, 18) === "tag:yaml.org,2002:") {
        tagStr = "!!" + tagStr.slice(18);
      } else {
        tagStr = "!<" + tagStr + ">";
      }

      state.dump = tagStr + " " + state.dump;
    }
  }

  return true;
}