[Drilldows] Url Drilldown basic template helpers

docs/user/dashboard/url-drilldown.asciidoc

@@ -135,6 +135,92 @@ Example:
 
 `{{ date event.from “YYYY MM DD”}}` +
 `{{date “now-15”}}`
+
+|formatNumber
+a|Format numbers. Numbers can be formatted to look like currency, percentages, times or numbers with decimal places, thousands, and abbreviations.
+Refer to the http://numeraljs.com/#format[numeral.js] for different formatting options. 
+
+Example:
+
+`{{formatNumber event.value "0.0"}}`
+
+|lowercase
+a|Converts a string to lower case.
+
+Example:
+
+`{{lowercase event.value}}`
+
+|uppercase
+a|Converts a string to upper case.
+
+Example:
+
+`{{uppercase event.value}}`
+
+|trim
+a|Removes leading and trailing spaces from a string.
+
+Example:
+
+`{{trim event.value}}`
+
+|trimLeft
+a|Removes leading spaces from a string.
+
+Example:
+
+`{{trimLeft event.value}}`
+
+|trimRight
+a|Removes trailing spaces from a string.
+
+Example:
+
+`{{trimRight event.value}}`
+
+|mid
+a|Extracts a substring from a string by start position and number of characters to extract.
+
+Example:
+
+`{{mid event.value 3 5}}` - extracts five characters starting from a third character. 
+
+|left
+a|Extracts a number of characters from a string (starting from left).
+
+Example:
+
+`{{left event.value 3}}`
+
+|right
+a|Extracts a number of characters from a string (starting from right).
+
+Example:
+
+`{{right event.value 3}}`
+
+|concat
+a|Concatenates two or more strings.
+
+Example:
+
+`{{concat event.value "," event.key}}`
+
+|replace
+a|Replaces all substrings within a string.
+
+Example:
+
+`{{replace event.value "stringToReplace" "stringToReplaceWith"}}`
+
+|split
+a|Splits a string using a provided splitter.
+
+Example:
+
+`{{split event.value ","}}`
+
 |===
 
 

x-pack/plugins/ui_actions_enhanced/public/drilldowns/url_drilldown/url_template.test.ts

@@ -139,3 +139,161 @@ describe('date helper', () => {
     );
   });
 });
+
+describe('formatNumber helper', () => {
+  test('formats string numbers', () => {
+    const url = 'https://elastic.co/{{formatNumber value "0.0"}}';
+    expect(compile(url, { value: '32.9999' })).toMatchInlineSnapshot(`"https://elastic.co/33.0"`);
+    expect(compile(url, { value: '32.555' })).toMatchInlineSnapshot(`"https://elastic.co/32.6"`);
+  });
+
+  test('formats numbers', () => {
+    const url = 'https://elastic.co/{{formatNumber value "0.0"}}';
+    expect(compile(url, { value: 32.9999 })).toMatchInlineSnapshot(`"https://elastic.co/33.0"`);
+    expect(compile(url, { value: 32.555 })).toMatchInlineSnapshot(`"https://elastic.co/32.6"`);
+  });
+
+  test("doesn't fail on Nan", () => {
+    const url = 'https://elastic.co/{{formatNumber value "0.0"}}';
+    expect(compile(url, { value: null })).toMatchInlineSnapshot(`"https://elastic.co/"`);
+    expect(compile(url, { value: undefined })).toMatchInlineSnapshot(`"https://elastic.co/"`);
+    expect(compile(url, { value: 'not a number' })).toMatchInlineSnapshot(
+      `"https://elastic.co/not%20a%20number"`
+    );
+  });
+
+  test('fails on missing format string', () => {
+    const url = 'https://elastic.co/{{formatNumber value}}';
+    expect(() => compile(url, { value: 12 })).toThrowError();
+  });
+
+  // this doesn't work and doesn't seem
+  // possible to validate with our version of numeral
+  test.skip('fails on malformed format string', () => {
+    const url = 'https://elastic.co/{{formatNumber value "not a real format string"}}';
+    expect(() => compile(url, { value: 12 })).toThrowError();
+  });
+});
+
+describe('replace helper', () => {
+  test('replaces all occurrences', () => {
+    const url = 'https://elastic.co/{{replace value "replace-me" "with-me"}}';
+
+    expect(compile(url, { value: 'replace-me test replace-me' })).toMatchInlineSnapshot(
+      `"https://elastic.co/with-me%20test%20with-me"`
+    );
+  });
+
+  test('can be used to remove a substring', () => {
+    const url = 'https://elastic.co/{{replace value "Label:" ""}}';
+
+    expect(compile(url, { value: 'Label:Feature:Something' })).toMatchInlineSnapshot(
+      `"https://elastic.co/Feature:Something"`
+    );
+  });
+
+  test('works if no matches', () => {
+    const url = 'https://elastic.co/{{replace value "Label:" ""}}';
+
+    expect(compile(url, { value: 'No matches' })).toMatchInlineSnapshot(
+      `"https://elastic.co/No%20matches"`
+    );
+  });
+
+  test('throws on incorrect args', () => {
+    expect(() =>
+      compile('https://elastic.co/{{replace value "Label:"}}', { value: 'No matches' })
+    ).toThrowErrorMatchingInlineSnapshot(
+      `"[replace]: \\"searchString\\" and \\"valueString\\" parameters expected to be strings, but not a string or missing"`
+    );
+    expect(() =>
+      compile('https://elastic.co/{{replace value "Label:" 4}}', { value: 'No matches' })
+    ).toThrowErrorMatchingInlineSnapshot(
+      `"[replace]: \\"searchString\\" and \\"valueString\\" parameters expected to be strings, but not a string or missing"`
+    );
+    expect(() =>
+      compile('https://elastic.co/{{replace value 4 ""}}', { value: 'No matches' })
+    ).toThrowErrorMatchingInlineSnapshot(
+      `"[replace]: \\"searchString\\" and \\"valueString\\" parameters expected to be strings, but not a string or missing"`
+    );
+    expect(() =>
+      compile('https://elastic.co/{{replace value}}', { value: 'No matches' })
+    ).toThrowErrorMatchingInlineSnapshot(
+      `"[replace]: \\"searchString\\" and \\"valueString\\" parameters expected to be strings, but not a string or missing"`
+    );
+  });
+});
+
+describe('basic string formatting helpers', () => {
+  test('lowercase', () => {
+    const compileUrl = (value: unknown) =>
+      compile('https://elastic.co/{{lowercase value}}', { value });
+
+    expect(compileUrl('Some String Value')).toMatchInlineSnapshot(
+      `"https://elastic.co/some%20string%20value"`
+    );
+    expect(compileUrl(4)).toMatchInlineSnapshot(`"https://elastic.co/4"`);
+    expect(compileUrl(null)).toMatchInlineSnapshot(`"https://elastic.co/null"`);
+  });
+  test('uppercase', () => {
+    const compileUrl = (value: unknown) =>
+      compile('https://elastic.co/{{uppercase value}}', { value });
+
+    expect(compileUrl('Some String Value')).toMatchInlineSnapshot(
+      `"https://elastic.co/SOME%20STRING%20VALUE"`
+    );
+    expect(compileUrl(4)).toMatchInlineSnapshot(`"https://elastic.co/4"`);
+    expect(compileUrl(null)).toMatchInlineSnapshot(`"https://elastic.co/NULL"`);
+  });
+  test('trim', () => {
+    const compileUrl = (fn: 'trim' | 'trimLeft' | 'trimRight', value: unknown) =>
+      compile(`https://elastic.co/{{${fn} value}}`, { value });
+
+    expect(compileUrl('trim', '  trim-me  ')).toMatchInlineSnapshot(`"https://elastic.co/trim-me"`);
+    expect(compileUrl('trimRight', '  trim-me  ')).toMatchInlineSnapshot(
+      `"https://elastic.co/%20%20trim-me"`
+    );
+    expect(compileUrl('trimLeft', '  trim-me  ')).toMatchInlineSnapshot(
+      `"https://elastic.co/trim-me%20%20"`
+    );
+  });
+  test('left,right,mid', () => {
+    const compileExpression = (expression: string, value: unknown) =>
+      compile(`https://elastic.co/${expression}`, { value });
+
+    expect(compileExpression('{{left value 3}}', '12345')).toMatchInlineSnapshot(
+      `"https://elastic.co/123"`
+    );
+    expect(compileExpression('{{right value 3}}', '12345')).toMatchInlineSnapshot(
+      `"https://elastic.co/345"`
+    );
+    expect(compileExpression('{{mid value 1 3}}', '12345')).toMatchInlineSnapshot(
+      `"https://elastic.co/234"`
+    );
+  });
+
+  test('concat', () => {
+    expect(
+      compile(`https://elastic.co/{{concat value1 "," value2}}`, { value1: 'v1', value2: 'v2' })
+    ).toMatchInlineSnapshot(`"https://elastic.co/v1,v2"`);
+
+    expect(
+      compile(`https://elastic.co/{{concat valueArray}}`, { valueArray: ['1', '2', '3'] })
+    ).toMatchInlineSnapshot(`"https://elastic.co/1,2,3"`);
+  });
+
+  test('split', () => {
+    expect(
+      compile(
+        `https://elastic.co/{{lookup (split value ",") 0 }}&{{lookup (split value ",") 1 }}`,
+        {
+          value: '47.766201,-122.257057',
+        }
+      )
+    ).toMatchInlineSnapshot(`"https://elastic.co/47.766201&-122.257057"`);
+
+    expect(() =>
+      compile(`https://elastic.co/{{split value}}`, { value: '47.766201,-122.257057' })
+    ).toThrowErrorMatchingInlineSnapshot(`"[split] \\"splitter\\" expected to be a string"`);
+  });
+});

x-pack/plugins/ui_actions_enhanced/public/drilldowns/url_drilldown/url_template.ts

@@ -8,6 +8,7 @@ import { create as createHandlebars, HelperDelegate, HelperOptions } from 'handl
 import { encode, RisonValue } from 'rison-node';
 import dateMath from '@elastic/datemath';
 import moment, { Moment } from 'moment';
+import numeral from '@elastic/numeral';
 
 const handlebars = createHandlebars();
 
@@ -69,6 +70,52 @@ handlebars.registerHelper('date', (...args) => {
   return format ? momentDate.format(format) : momentDate.toISOString();
 });
 
+handlebars.registerHelper('formatNumber', (rawValue: unknown, pattern: string) => {
+  if (!pattern || typeof pattern !== 'string')
+    throw new Error(`[formatNumber]: pattern string is required`);
+  const value = Number(rawValue);
+  if (rawValue == null || Number.isNaN(value)) return rawValue;
+  return numeral(value).format(pattern);
+});
+
+handlebars.registerHelper('lowercase', (rawValue: unknown) => String(rawValue).toLowerCase());
+handlebars.registerHelper('uppercase', (rawValue: unknown) => String(rawValue).toUpperCase());
+handlebars.registerHelper('trim', (rawValue: unknown) => String(rawValue).trim());
+handlebars.registerHelper('trimLeft', (rawValue: unknown) => String(rawValue).trimLeft());
+handlebars.registerHelper('trimRight', (rawValue: unknown) => String(rawValue).trimRight());
+handlebars.registerHelper('left', (rawValue: unknown, numberOfChars: number) => {
+  if (typeof numberOfChars !== 'number')
+    throw new Error('[left]: expected "number of characters to extract" to be a number');
+  return String(rawValue).slice(0, numberOfChars);
+});
+handlebars.registerHelper('right', (rawValue: unknown, numberOfChars: number) => {
+  if (typeof numberOfChars !== 'number')
+    throw new Error('[left]: expected "number of characters to extract" to be a number');
+  return String(rawValue).slice(-numberOfChars);
+});
+handlebars.registerHelper('mid', (rawValue: unknown, start: number, length: number) => {
+  if (typeof start !== 'number') throw new Error('[left]: expected "start" to be a number');
+  if (typeof length !== 'number') throw new Error('[left]: expected "length" to be a number');
+  return String(rawValue).substr(start, length);
+});
+handlebars.registerHelper('concat', (...args) => {
+  const values = args.slice(0, -1) as unknown[];
+  return values.join('');
+});
+handlebars.registerHelper('split', (...args) => {
+  const [str, splitter] = args.slice(0, -1) as [string, string];
+  if (typeof splitter !== 'string') throw new Error('[split] "splitter" expected to be a string');
+  return String(str).split(splitter);
+});
+handlebars.registerHelper('replace', (...args) => {
+  const [str, searchString, valueString] = args.slice(0, -1) as [string, string, string];
+  if (typeof searchString !== 'string' || typeof valueString !== 'string')
+    throw new Error(
+      '[replace]: "searchString" and "valueString" parameters expected to be strings, but not a string or missing'
+    );
+  return String(str).split(searchString).join(valueString);
+});
+
 export function compile(url: string, context: object): string {
   const template = handlebars.compile(url, { strict: true, noEscape: true });
   return encodeURI(template(context));