forked from treehouse/mastodon
Updates to bio metadata script
kibigo!
parent
f5e2469485
commit
21bafc6555
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@ -69,6 +69,10 @@ functions are:
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easier to read and to maintain. I leave it to the future readers of
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this code to determine the extent of my successes in this endeavor.
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UPDATE 19 Oct 2017: We no longer allow character escapes inside our
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double-quoted strings for ease of processing. We now internally use
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the name "ƔAML" in our code to clarify that this is Not Quite YAML.
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Sending love + warmth eternal,
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- kibigo [@kibi@glitch.social]
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@ -96,10 +100,7 @@ const ALLOWED_CHAR = unirex( // `c-printable` in the YAML 1.2 spec.
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compat_mode ? '[\t\n\r\x20-\x7e\x85\xa0-\ufffd]' : '[\t\n\r\x20-\x7e\x85\xa0-\ud7ff\ue000-\ufffd\u{10000}-\u{10FFFF}]'
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);
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const WHITE_SPACE = /[ \t]/;
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const INDENTATION = / */; // Indentation must be only spaces.
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const LINE_BREAK = /\r?\n|\r|<br\s*\/?>/;
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const ESCAPE_CHAR = /[0abt\tnvfre "\/\\N_LP]/;
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const HEXADECIMAL_CHARS = /[0-9a-fA-F]/;
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const INDICATOR = /[-?:,[\]{}&#*!|>'"%@`]/;
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const FLOW_CHAR = /[,[\]{}]/;
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@ -121,7 +122,7 @@ const NEW_LINE = unirex(
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rexstr(ANY_WHITE_SPACE) + rexstr(LINE_BREAK)
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);
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const SOME_NEW_LINES = unirex(
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'(?:' + rexstr(ANY_WHITE_SPACE) + rexstr(LINE_BREAK) + ')+'
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'(?:' + rexstr(NEW_LINE) + ')+'
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);
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const POSSIBLE_STARTS = unirex(
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rexstr(DOCUMENT_START) + rexstr(/<p[^<>]*>/) + '?'
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@ -131,22 +132,13 @@ const POSSIBLE_ENDS = unirex(
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rexstr(DOCUMENT_END) + '|' +
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rexstr(/<\/p>/)
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);
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const CHARACTER_ESCAPE = unirex(
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rexstr(/\\/) +
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'(?:' +
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rexstr(ESCAPE_CHAR) + '|' +
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rexstr(/x/) + rexstr(HEXADECIMAL_CHARS) + '{2}' + '|' +
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rexstr(/u/) + rexstr(HEXADECIMAL_CHARS) + '{4}' + '|' +
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rexstr(/U/) + rexstr(HEXADECIMAL_CHARS) + '{8}' +
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')'
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const QUOTE_CHAR = unirex(
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'(?=' + rexstr(NOT_LINE_BREAK) + ')[^"]'
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);
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const ESCAPED_CHAR = unirex(
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rexstr(/(?!["\\])/) + rexstr(NOT_LINE_BREAK) + '|' +
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rexstr(CHARACTER_ESCAPE)
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);
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const ANY_ESCAPED_CHARS = unirex(
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rexstr(ESCAPED_CHAR) + '*'
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const ANY_QUOTE_CHAR = unirex(
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rexstr(QUOTE_CHAR) + '*'
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);
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const ESCAPED_APOS = unirex(
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'(?=' + rexstr(NOT_LINE_BREAK) + ')' + rexstr(/[^']|''/)
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);
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@ -190,120 +182,76 @@ const LATER_VALUE_CHAR = unirex(
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/* YAML CONSTRUCTS */
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const YAML_START = unirex(
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rexstr(ANY_WHITE_SPACE) + rexstr(/---/)
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const ƔAML_START = unirex(
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rexstr(ANY_WHITE_SPACE) + '---'
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);
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const YAML_END = unirex(
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rexstr(ANY_WHITE_SPACE) + rexstr(/(?:---|\.\.\.)/)
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const ƔAML_END = unirex(
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rexstr(ANY_WHITE_SPACE) + '(?:---|\.\.\.)'
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);
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const YAML_LOOKAHEAD = unirex(
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const ƔAML_LOOKAHEAD = unirex(
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'(?=' +
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rexstr(YAML_START) +
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rexstr(ƔAML_START) +
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rexstr(ANY_ALLOWED_CHARS) + rexstr(NEW_LINE) +
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rexstr(YAML_END) + rexstr(POSSIBLE_ENDS) +
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rexstr(ƔAML_END) + rexstr(POSSIBLE_ENDS) +
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')'
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);
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const YAML_DOUBLE_QUOTE = unirex(
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rexstr(/"/) + rexstr(ANY_ESCAPED_CHARS) + rexstr(/"/)
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const ƔAML_DOUBLE_QUOTE = unirex(
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'"' + rexstr(ANY_QUOTE_CHAR) + '"'
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);
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const YAML_SINGLE_QUOTE = unirex(
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rexstr(/'/) + rexstr(ANY_ESCAPED_APOS) + rexstr(/'/)
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const ƔAML_SINGLE_QUOTE = unirex(
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'\'' + rexstr(ANY_ESCAPED_APOS) + '\''
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);
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const YAML_SIMPLE_KEY = unirex(
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const ƔAML_SIMPLE_KEY = unirex(
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rexstr(FIRST_KEY_CHAR) + rexstr(LATER_KEY_CHAR) + '*'
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);
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const YAML_SIMPLE_VALUE = unirex(
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const ƔAML_SIMPLE_VALUE = unirex(
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rexstr(FIRST_VALUE_CHAR) + rexstr(LATER_VALUE_CHAR) + '*'
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);
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const YAML_KEY = unirex(
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rexstr(YAML_DOUBLE_QUOTE) + '|' +
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rexstr(YAML_SINGLE_QUOTE) + '|' +
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rexstr(YAML_SIMPLE_KEY)
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const ƔAML_KEY = unirex(
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rexstr(ƔAML_DOUBLE_QUOTE) + '|' +
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rexstr(ƔAML_SINGLE_QUOTE) + '|' +
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rexstr(ƔAML_SIMPLE_KEY)
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);
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const YAML_VALUE = unirex(
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rexstr(YAML_DOUBLE_QUOTE) + '|' +
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rexstr(YAML_SINGLE_QUOTE) + '|' +
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rexstr(YAML_SIMPLE_VALUE)
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const ƔAML_VALUE = unirex(
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rexstr(ƔAML_DOUBLE_QUOTE) + '|' +
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rexstr(ƔAML_SINGLE_QUOTE) + '|' +
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rexstr(ƔAML_SIMPLE_VALUE)
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);
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const YAML_SEPARATOR = unirex(
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const ƔAML_SEPARATOR = unirex(
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rexstr(ANY_WHITE_SPACE) +
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':' + rexstr(WHITE_SPACE) +
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rexstr(ANY_WHITE_SPACE)
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);
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const YAML_LINE = unirex(
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'(' + rexstr(YAML_KEY) + ')' +
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rexstr(YAML_SEPARATOR) +
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'(' + rexstr(YAML_VALUE) + ')'
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const ƔAML_LINE = unirex(
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'(' + rexstr(ƔAML_KEY) + ')' +
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rexstr(ƔAML_SEPARATOR) +
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'(' + rexstr(ƔAML_VALUE) + ')'
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);
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/* FRONTMATTER REGEX */
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const YAML_FRONTMATTER = unirex(
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const ƔAML_FRONTMATTER = unirex(
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rexstr(POSSIBLE_STARTS) +
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rexstr(YAML_LOOKAHEAD) +
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rexstr(YAML_START) + rexstr(SOME_NEW_LINES) +
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rexstr(ƔAML_LOOKAHEAD) +
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rexstr(ƔAML_START) + rexstr(SOME_NEW_LINES) +
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'(?:' +
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'(' + rexstr(INDENTATION) + ')' +
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rexstr(YAML_LINE) + rexstr(SOME_NEW_LINES) +
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'(?:' +
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'\\1' + rexstr(YAML_LINE) + rexstr(SOME_NEW_LINES) +
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'){0,4}' +
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')?' +
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rexstr(YAML_END) + rexstr(POSSIBLE_ENDS)
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rexstr(ANY_WHITE_SPACE) + rexstr(ƔAML_LINE) + rexstr(SOME_NEW_LINES) +
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'){0,5}' +
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rexstr(ƔAML_END) + rexstr(POSSIBLE_ENDS)
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);
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/* SEARCHES */
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const FIND_YAML_LINES = unirex(
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rexstr(NEW_LINE) + rexstr(INDENTATION) + rexstr(YAML_LINE)
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const FIND_ƔAML_LINE = unirex(
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rexstr(NEW_LINE) + rexstr(ANY_WHITE_SPACE) + rexstr(ƔAML_LINE)
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);
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/* STRING PROCESSING */
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function processString(str) {
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function processString (str) {
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switch (str.charAt(0)) {
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case '"':
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return str
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.substring(1, str.length - 1)
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.replace(/\\0/g, '\x00')
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.replace(/\\a/g, '\x07')
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.replace(/\\b/g, '\x08')
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.replace(/\\t/g, '\x09')
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.replace(/\\\x09/g, '\x09')
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.replace(/\\n/g, '\x0a')
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.replace(/\\v/g, '\x0b')
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.replace(/\\f/g, '\x0c')
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.replace(/\\r/g, '\x0d')
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.replace(/\\e/g, '\x1b')
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.replace(/\\ /g, '\x20')
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.replace(/\\"/g, '\x22')
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.replace(/\\\//g, '\x2f')
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.replace(/\\\\/g, '\x5c')
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.replace(/\\N/g, '\x85')
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.replace(/\\_/g, '\xa0')
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.replace(/\\L/g, '\u2028')
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.replace(/\\P/g, '\u2029')
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.replace(
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new RegExp(
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unirex(
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rexstr(/\\x/) + '(' + rexstr(HEXADECIMAL_CHARS) + '{2})'
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), 'gu'
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), (_, n) => String.fromCodePoint('0x' + n)
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)
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.replace(
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new RegExp(
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unirex(
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rexstr(/\\u/) + '(' + rexstr(HEXADECIMAL_CHARS) + '{4})'
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), 'gu'
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), (_, n) => String.fromCodePoint('0x' + n)
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)
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.replace(
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new RegExp(
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unirex(
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rexstr(/\\U/) + '(' + rexstr(HEXADECIMAL_CHARS) + '{8})'
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), 'gu'
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), (_, n) => String.fromCodePoint('0x' + n)
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);
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return str.substring(1, str.length - 1);
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case '\'':
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return str
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.substring(1, str.length - 1)
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@ -321,15 +269,18 @@ export function processBio(content) {
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text: content,
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metadata: [],
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};
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let yaml = content.match(YAML_FRONTMATTER);
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if (!yaml) return result;
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else yaml = yaml[0];
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let start = content.search(YAML_START);
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let end = start + yaml.length - yaml.search(YAML_START);
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result.text = content.substr(0, start) + content.substr(end);
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let ɣaml = content.match(ƔAML_FRONTMATTER);
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if (!ɣaml) {
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return result;
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} else {
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ɣaml = ɣaml[0];
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}
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const start = content.search(ƔAML_START);
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const end = start + ɣaml.length - ɣaml.search(ƔAML_START);
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result.text = content.substr(end);
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let metadata = null;
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let query = new RegExp(FIND_YAML_LINES, 'g');
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while ((metadata = query.exec(yaml))) {
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let query = new RegExp(rexstr(FIND_ƔAML_LINE), 'g'); // Some browsers don't allow flags unless both args are strings
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while ((metadata = query.exec(ɣaml))) {
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result.metadata.push([
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processString(metadata[1]),
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processString(metadata[2]),
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@ -352,63 +303,23 @@ export function createBio(note, data) {
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let val = '' + data[i][1];
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// Key processing
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if (key === (key.match(YAML_SIMPLE_KEY) || [])[0]) /* do nothing */;
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else if (key.indexOf('\'') === -1 && key === (key.match(ANY_ESCAPED_APOS) || [])[0]) key = '\'' + key + '\'';
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if (key === (key.match(ƔAML_SIMPLE_KEY) || [])[0]) /* do nothing */;
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else if (key === (key.match(ANY_QUOTE_CHAR) || [])[0]) key = '"' + key + '"';
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else {
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key = key
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.replace(/\x00/g, '\\0')
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.replace(/\x07/g, '\\a')
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.replace(/\x08/g, '\\b')
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.replace(/\x0a/g, '\\n')
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.replace(/\x0b/g, '\\v')
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.replace(/\x0c/g, '\\f')
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.replace(/\x0d/g, '\\r')
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.replace(/\x1b/g, '\\e')
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.replace(/\x22/g, '\\"')
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.replace(/\x5c/g, '\\\\');
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let badchars = key.match(
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new RegExp(rexstr(NOT_ALLOWED_CHAR), 'gu')
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) || [];
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for (let j = 0; j < badchars.length; j++) {
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key = key.replace(
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badchars[i],
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'\\u' + badchars[i].codePointAt(0).toLocaleString('en', {
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useGrouping: false,
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minimumIntegerDigits: 4,
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})
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);
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}
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key = '"' + key + '"';
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.replace(/'/g, '\'\'')
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.replace(new RegExp(rexstr(NOT_ALLOWED_CHAR), compat_mode ? 'g' : 'gu'), '<27>');
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key = '\'' + key + '\'';
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}
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// Value processing
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if (val === (val.match(YAML_SIMPLE_VALUE) || [])[0]) /* do nothing */;
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else if (val.indexOf('\'') === -1 && val === (val.match(ANY_ESCAPED_APOS) || [])[0]) val = '\'' + val + '\'';
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if (val === (val.match(ƔAML_SIMPLE_VALUE) || [])[0]) /* do nothing */;
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else if (val === (val.match(ANY_QUOTE_CHAR) || [])[0]) val = '"' + val + '"';
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else {
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val = val
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.replace(/\x00/g, '\\0')
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.replace(/\x07/g, '\\a')
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.replace(/\x08/g, '\\b')
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.replace(/\x0a/g, '\\n')
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.replace(/\x0b/g, '\\v')
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.replace(/\x0c/g, '\\f')
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.replace(/\x0d/g, '\\r')
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.replace(/\x1b/g, '\\e')
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.replace(/\x22/g, '\\"')
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.replace(/\x5c/g, '\\\\');
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let badchars = val.match(
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new RegExp(rexstr(NOT_ALLOWED_CHAR), 'gu')
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) || [];
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for (let j = 0; j < badchars.length; j++) {
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val = val.replace(
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badchars[i],
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'\\u' + badchars[i].codePointAt(0).toLocaleString('en', {
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useGrouping: false,
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minimumIntegerDigits: 4,
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})
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);
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}
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val = '"' + val + '"';
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key = key
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.replace(/'/g, '\'\'')
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.replace(new RegExp(rexstr(NOT_ALLOWED_CHAR), compat_mode ? 'g' : 'gu'), '<27>');
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key = '\'' + key + '\'';
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}
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frontmatter += key + ': ' + val + '\n';
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