refactor: make error codes an enum

Author: DylanPiercey

src/__tests__/fixtures/argument-attr-multiple/__snapshots__/argument-attr-multiple.expected.txt

@@ -1,5 +1,5 @@
 1╭─ <div for(var i = 0; i < 10; i++) (nonsense!)></div>
- │   │   │  ││                        ╰─ error(ILLEGAL_ATTRIBUTE_ARGUMENT:An attribute can only have one set of arguments) "nonsense!"
+ │   │   │  ││                        ╰─ error(INVALID_ATTRIBUTE_ARGUMENT:An attribute can only have one set of arguments) "nonsense!"
  │   │   │  │╰─ attrArgs.value "var i = 0; i < 10; i++"
  │   │   │  ╰─ attrArgs "(var i = 0; i < 10; i++)"
  │   │   ╰─ attrName "for"

src/__tests__/fixtures/argument-tag-multiple/__snapshots__/argument-tag-multiple.expected.txt

@@ -1,5 +1,5 @@
 1╭─ <for(var i = 0; i < 10; i++) (nonsense!)></for>
- │   │  ││                       ╰─ error(ILLEGAL_TAG_ARGUMENT:A tag can only have one argument)
+ │   │  ││                       ╰─ error(INVALID_TAG_ARGUMENT:A tag can only have one argument)
  │   │  │╰─ tagArgs.value "var i = 0; i < 10; i++"
  │   │  ╰─ tagArgs "(var i = 0; i < 10; i++)"
  ╰─  ╰─ tagName "for"

src/__tests__/fixtures/attr-name-with-html-chars/__snapshots__/attr-name-with-html-chars.expected.txt

@@ -1,3 +1,3 @@
 1╭─ tagname <span>hello frank</span>
- │  │       ╰─ error(ILLEGAL_ATTRIBUTE_NAME:Invalid attribute name. Attribute name cannot begin with the "<" character.)
+ │  │       ╰─ error(INVALID_ATTRIBUTE_NAME:Invalid attribute name. Attribute name cannot begin with the "<" character.)
  ╰─ ╰─ tagName "tagname"

src/__tests__/fixtures/bad-tag-indent/__snapshots__/bad-tag-indent.expected.txt

@@ -1,2 +1,2 @@
 1╭─     var colors=['red', 'green', 'blue']
- ╰─     ╰─ error(BAD_INDENTATION:Line has extra indentation at the beginning)
+ ╰─     ╰─ error(INVALID_INDENTATION:Line has extra indentation at the beginning)

src/__tests__/fixtures/mixed-bad-indentation/__snapshots__/mixed-bad-indentation.expected.txt

@@ -8,4 +8,4 @@
  │  │    ╰─ tagName
  ╰─ ╰─ openTagEnd
 3╭─         BAD
- ╰─         ╰─ error(BAD_INDENTATION:Line indentation does match indentation of previous line)
+ ╰─         ╰─ error(INVALID_INDENTATION:Line indentation does match indentation of previous line)

src/__tests__/fixtures/open-tag-only-with-body-concise/__snapshots__/open-tag-only-with-body-concise.expected.txt

@@ -4,5 +4,5 @@
  │  │   ╰─ attrName "src"
  ╰─ ╰─ tagName "img"
 2╭─     This is not allowed!
- │  │   ╰─ error(BAD_INDENTATION:Line has extra indentation at the beginning)
+ │  │   ╰─ error(INVALID_INDENTATION:Line has extra indentation at the beginning)
  ╰─ ╰─ openTagEnd

src/__tests__/fixtures/placeholder-empty/__snapshots__/placeholder-empty.expected.txt

@@ -1,3 +1,3 @@
 1╭─ <${}/>
- ╰─    ╰─ error(PLACEHOLDER_EXPRESSION_REQUIRED:Invalid placeholder, the expression cannot be missing)
+ ╰─    ╰─ error(MALFORMED_PLACEHOLDER:Invalid placeholder, the expression cannot be missing)
 2╰─ 

src/__tests__/fixtures/script-concise-invalid-nested-tag/__snapshots__/script-concise-invalid-nested-tag.expected.txt

@@ -1,6 +1,6 @@
 1╭─ script
  ╰─ ╰─ tagName "script"
 2╭─     p - This is not allowed
- │  │   ╰─ error(ILLEGAL_LINE_START:A line within a tag that only allows text content must begin with a "-" character)
+ │  │   ╰─ error(INVALID_LINE_START:A line within a tag that only allows text content must begin with a "-" character)
  ╰─ ╰─ openTagEnd
 3╰─ div

src/__tests__/main.test.ts

@@ -1,7 +1,7 @@
 import fs from "fs";
 import path from "path";
 import snap from "mocha-snap";
-import { getLines, TagType } from "../internal";
+import { ErrorCode, getLines, TagType } from "../internal";
 import { createParser, Position, Ranges, Range } from "..";
 
 const FIXTURES = path.join(__dirname, "fixtures");
@@ -61,7 +61,7 @@ for (const entry of fs.readdirSync(FIXTURES)) {
     const tagStack: Ranges.TagName[] = [];
     const parser = createParser({
       onError(range) {
-        addRange(`error(${range.code}:${range.message})`, range);
+        addRange(`error(${ErrorCode[range.code]}:${range.message})`, range);
       },
       onText(range) {
         addRange("text", range);

src/core/Parser.ts

@@ -8,6 +8,7 @@ import {
   getLines,
   getLoc,
   getPos,
+  ErrorCode,
 } from "../internal";
 
 export interface Meta extends Range {
@@ -169,7 +170,7 @@ export class Parser {
     content.indent = this.indent;
   }
 
-  emitError(range: number | Range, code: string, message: string) {
+  emitError(range: number | Range, code: ErrorCode, message: string) {
     let start, end;
 
     if (typeof range === "number") {