add new tools json to go

src/tools/index.ts

@@ -12,6 +12,7 @@ import { tool as emojiPicker } from './emoji-picker';
 import { tool as passwordStrengthAnalyser } from './password-strength-analyser';
 import { tool as yamlToToml } from './yaml-to-toml';
 import { tool as jsonToToml } from './json-to-toml';
+import { tool as jsonToGo } from './json-to-go';
 import { tool as tomlToYaml } from './toml-to-yaml';
 import { tool as tomlToJson } from './toml-to-json';
 import { tool as jsonToCsv } from './json-to-csv';
@@ -96,6 +97,7 @@ export const toolsByCategory: ToolCategory[] = [
       yamlToToml,
       jsonToYaml,
       jsonToToml,
+      jsonToGo,
       listConverter,
       tomlToJson,
       tomlToYaml,

src/tools/json-to-go/index.ts

@@ -0,0 +1,13 @@
+import { Braces } from '@vicons/tabler';
+import { defineTool } from '../tool';
+import { translate } from '@/plugins/i18n.plugin';
+
+export const tool = defineTool({
+  name: translate('tools.json-to-go.title'),
+  path: '/json-to-go',
+  description: translate('tools.json-to-go.description'),
+  keywords: ['json', 'parse', 'go', 'convert', 'transform'],
+  component: () => import('./json-to-go.vue'),
+  icon: Braces,
+  createdAt: new Date('2023-11-08'),
+});

src/tools/json-to-go/json-to-go.service.ts

@@ -0,0 +1,413 @@
+// JSON-to-Go
+// by Matt Holt
+// https://github.com/mholt/json-to-go
+// A simple utility to translate JSON into a Go type definition.
+export function jsonToGo(json, typename, flatten = true, example = false, allOmitempty = false) {
+  let data;
+  let scope;
+  let go = '';
+  let tabs = 0;
+
+  const seen = {};
+  const stack = [];
+  let accumulator = '';
+  const innerTabs = 0;
+  let parent = '';
+
+  try {
+    data = JSON.parse(json.replace(/(:\s*\[?\s*-?\d*)\.0/g, '$1.1')); // hack that forces floats to stay as floats
+    scope = data;
+  }
+  catch (e) {
+    return {
+      go: '',
+      error: e.message,
+    };
+  }
+
+  typename = format(typename || 'AutoGenerated');
+  append(`type ${typename} `);
+
+  parseScope(scope);
+
+  return {
+    go: flatten
+      ? go += accumulator
+      : go,
+  };
+
+  function parseScope(scope, depth = 0) {
+    if (typeof scope === 'object' && scope !== null) {
+      if (Array.isArray(scope)) {
+        let sliceType;
+        const scopeLength = scope.length;
+
+        for (let i = 0; i < scopeLength; i++) {
+          const thisType = goType(scope[i]);
+          if (!sliceType) { sliceType = thisType; }
+          else if (sliceType != thisType) {
+            sliceType = mostSpecificPossibleGoType(thisType, sliceType);
+            if (sliceType == 'any') { break; }
+          }
+        }
+
+        const slice = flatten && ['struct', 'slice'].includes(sliceType)
+          ? `[]${parent}`
+          : '[]';
+
+        if (flatten && depth >= 2) { appender(slice); }
+        else { append(slice); };
+        if (sliceType == 'struct') {
+          const allFields = {};
+
+          // for each field counts how many times appears
+          for (let i = 0; i < scopeLength; i++) {
+            const keys = Object.keys(scope[i]);
+            for (const k in keys) {
+              let keyname = keys[k];
+              if (!(keyname in allFields)) {
+                allFields[keyname] = {
+                  value: scope[i][keyname],
+                  count: 0,
+                };
+              }
+              else {
+                const existingValue = allFields[keyname].value;
+                const currentValue = scope[i][keyname];
+
+                if (compareObjects(existingValue, currentValue)) {
+                  const comparisonResult = compareObjectKeys(
+                    Object.keys(currentValue),
+                    Object.keys(existingValue),
+                  );
+                  if (!comparisonResult) {
+                    keyname = `${keyname}_${uuidv4()}`;
+                    allFields[keyname] = {
+                      value: currentValue,
+                      count: 0,
+                    };
+                  }
+                }
+              }
+              allFields[keyname].count++;
+            }
+          }
+
+          // create a common struct with all fields found in the current array
+          // omitempty dict indicates if a field is optional
+          const keys = Object.keys(allFields); const struct = {}; const omitempty = {};
+          for (const k in keys) {
+            const keyname = keys[k]; const elem = allFields[keyname];
+
+            struct[keyname] = elem.value;
+            omitempty[keyname] = elem.count != scopeLength;
+          }
+          parseStruct(depth + 1, innerTabs, struct, omitempty); // finally parse the struct !!
+        }
+        else if (sliceType == 'slice') {
+          parseScope(scope[0], depth);
+        }
+        else {
+          if (flatten && depth >= 2) {
+            appender(sliceType || 'any');
+          }
+          else {
+            append(sliceType || 'any');
+          }
+        }
+      }
+      else {
+        if (flatten) {
+          if (depth >= 2) {
+            appender(parent);
+          }
+          else {
+            append(parent);
+          }
+        }
+        parseStruct(depth + 1, innerTabs, scope);
+      }
+    }
+    else {
+      if (flatten && depth >= 2) {
+        appender(goType(scope));
+      }
+      else {
+        append(goType(scope));
+      }
+    }
+  }
+
+  function parseStruct(depth, innerTabs, scope, omitempty) {
+    if (flatten) {
+      stack.push(
+        depth >= 2
+          ? '\n'
+          : '',
+      );
+    }
+
+    const seenTypeNames = [];
+
+    if (flatten && depth >= 2) {
+      const parentType = `type ${parent}`;
+      const scopeKeys = formatScopeKeys(Object.keys(scope));
+
+      // this can only handle two duplicate items
+      // future improvement will handle the case where there could
+      // three or more duplicate keys with different values
+      if (parent in seen && compareObjectKeys(scopeKeys, seen[parent])) {
+        stack.pop();
+        return;
+      }
+      seen[parent] = scopeKeys;
+
+      appender(`${parentType} struct {\n`);
+      ++innerTabs;
+      const keys = Object.keys(scope);
+      for (const i in keys) {
+        const keyname = getOriginalName(keys[i]);
+        indenter(innerTabs);
+        const typename = uniqueTypeName(format(keyname), seenTypeNames);
+        seenTypeNames.push(typename);
+
+        appender(`${typename} `);
+        parent = typename;
+        parseScope(scope[keys[i]], depth);
+        appender(` \`json:"${keyname}`);
+        if (allOmitempty || (omitempty && omitempty[keys[i]] === true)) {
+          appender(',omitempty');
+        }
+        appender('"`\n');
+      }
+      indenter(--innerTabs);
+      appender('}');
+    }
+    else {
+      append('struct {\n');
+      ++tabs;
+      const keys = Object.keys(scope);
+      for (const i in keys) {
+        const keyname = getOriginalName(keys[i]);
+        indent(tabs);
+        const typename = uniqueTypeName(format(keyname), seenTypeNames);
+        seenTypeNames.push(typename);
+        append(`${typename} `);
+        parent = typename;
+        parseScope(scope[keys[i]], depth);
+        append(` \`json:"${keyname}`);
+        if (allOmitempty || (omitempty && omitempty[keys[i]] === true)) {
+          append(',omitempty');
+        }
+        if (example && scope[keys[i]] !== '' && typeof scope[keys[i]] !== 'object') {
+          append(`" example:"${scope[keys[i]]}`);
+        }
+        append('"`\n');
+      }
+      indent(--tabs);
+      append('}');
+    }
+    if (flatten) { accumulator += stack.pop(); }
+  }
+
+  function indent(tabs) {
+    for (let i = 0; i < tabs; i++) { go += '\t'; }
+  }
+
+  function append(str) {
+    go += str;
+  }
+
+  function indenter(tabs) {
+    for (let i = 0; i < tabs; i++) { stack[stack.length - 1] += '\t'; }
+  }
+
+  function appender(str) {
+    stack[stack.length - 1] += str;
+  }
+
+  // Generate a unique name to avoid duplicate struct field names.
+  // This function appends a number at the end of the field name.
+  function uniqueTypeName(name, seen) {
+    if (!seen.includes(name)) {
+      return name;
+    }
+
+    let i = 0;
+    while (true) {
+      const newName = name + i.toString();
+      if (!seen.includes(newName)) {
+        return newName;
+      }
+
+      i++;
+    }
+  }
+
+  // Sanitizes and formats a string to make an appropriate identifier in Go
+  function format(str) {
+    str = formatNumber(str);
+
+    const sanitized = toProperCase(str).replace(/[^a-z0-9]/ig, '');
+    if (!sanitized) {
+      return 'NAMING_FAILED';
+    }
+
+    // After sanitizing the remaining characters can start with a number.
+    // Run the sanitized string again trough formatNumber to make sure the identifier is Num[0-9] or Zero_... instead of 1.
+    return formatNumber(sanitized);
+  }
+
+  // Adds a prefix to a number to make an appropriate identifier in Go
+  function formatNumber(str) {
+    if (!str) { return ''; }
+    else if (str.match(/^\d+$/)) { str = `Num${str}`; }
+    else if (str.charAt(0).match(/\d/)) {
+      const numbers = {
+        0: 'Zero_',
+        1: 'One_',
+        2: 'Two_',
+        3: 'Three_',
+        4: 'Four_',
+        5: 'Five_',
+        6: 'Six_',
+        7: 'Seven_',
+        8: 'Eight_',
+        9: 'Nine_',
+      };
+      str = numbers[str.charAt(0)] + str.substr(1);
+    }
+
+    return str;
+  }
+
+  // Determines the most appropriate Go type
+  function goType(val) {
+    if (val === null) { return 'any'; }
+
+    switch (typeof val) {
+      case 'string':
+        if (/\d{4}-\d\d-\d\dT\d\d:\d\d:\d\d(\.\d+)?(\+\d\d:\d\d|Z)/.test(val)) { return 'time.Time'; }
+        else { return 'string'; }
+      case 'number':
+        if (val % 1 === 0) {
+          if (val > -2147483648 && val < 2147483647) { return 'int'; }
+          else { return 'int64'; }
+        }
+        else { return 'float64'; }
+      case 'boolean':
+        return 'bool';
+      case 'object':
+        if (Array.isArray(val)) { return 'slice'; }
+        return 'struct';
+      default:
+        return 'any';
+    }
+  }
+
+  // Given two types, returns the more specific of the two
+  function mostSpecificPossibleGoType(typ1, typ2) {
+    if (typ1.substr(0, 5) == 'float'
+				&& typ2.substr(0, 3) == 'int') { return typ1; }
+    else if (typ1.substr(0, 3) == 'int'
+				&& typ2.substr(0, 5) == 'float') { return typ2; }
+    else { return 'any'; }
+  }
+
+  // Proper cases a string according to Go conventions
+  function toProperCase(str) {
+    // ensure that the SCREAMING_SNAKE_CASE is converted to snake_case
+    if (str.match(/^[_A-Z0-9]+$/)) {
+      str = str.toLowerCase();
+    }
+
+    // https://github.com/golang/lint/blob/5614ed5bae6fb75893070bdc0996a68765fdd275/lint.go#L771-L810
+    const commonInitialisms = [
+      'ACL', 'API', 'ASCII', 'CPU', 'CSS', 'DNS', 'EOF', 'GUID', 'HTML', 'HTTP',
+      'HTTPS', 'ID', 'IP', 'JSON', 'LHS', 'QPS', 'RAM', 'RHS', 'RPC', 'SLA',
+      'SMTP', 'SQL', 'SSH', 'TCP', 'TLS', 'TTL', 'UDP', 'UI', 'UID', 'UUID',
+      'URI', 'URL', 'UTF8', 'VM', 'XML', 'XMPP', 'XSRF', 'XSS',
+    ];
+
+    return str.replace(/(^|[^a-zA-Z])([a-z]+)/g, (unused, sep, frag) => {
+      if (commonInitialisms.includes(frag.toUpperCase())) { return sep + frag.toUpperCase(); }
+      else { return sep + frag[0].toUpperCase() + frag.substr(1).toLowerCase(); }
+    }).replace(/([A-Z])([a-z]+)/g, (unused, sep, frag) => {
+      if (commonInitialisms.includes(sep + frag.toUpperCase())) { return (sep + frag).toUpperCase(); }
+      else { return sep + frag; }
+    });
+  }
+
+  function uuidv4() {
+    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
+		  const r = Math.random() * 16 | 0; const v = c == 'x' ? r : (r & 0x3 | 0x8);
+		  return v.toString(16);
+    });
+  }
+
+  function getOriginalName(unique) {
+    const reLiteralUUID = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
+    const uuidLength = 36;
+
+    if (unique.length >= uuidLength) {
+      const tail = unique.substr(-uuidLength);
+      if (reLiteralUUID.test(tail)) {
+        return unique.slice(0, -1 * (uuidLength + 1));
+      }
+    }
+    return unique;
+  }
+
+  function compareObjects(objectA, objectB) {
+    const object = '[object Object]';
+    return Object.prototype.toString.call(objectA) === object
+			&& Object.prototype.toString.call(objectB) === object;
+  }
+
+  function compareObjectKeys(itemAKeys, itemBKeys) {
+    const lengthA = itemAKeys.length;
+    const lengthB = itemBKeys.length;
+
+    // nothing to compare, probably identical
+    if (lengthA == 0 && lengthB == 0) { return true; }
+
+    // duh
+    if (lengthA != lengthB) { return false; }
+
+    for (const item of itemAKeys) {
+      if (!itemBKeys.includes(item)) { return false; }
+    }
+    return true;
+  }
+
+  function formatScopeKeys(keys) {
+    for (const i in keys) {
+      keys[i] = format(keys[i]);
+    }
+    return keys;
+  }
+}
+
+if (typeof module != 'undefined') {
+  if (!module.parent) {
+    if (process.argv.length > 2 && process.argv[2] === '-big') {
+      bufs = [];
+      process.stdin.on('data', (buf) => {
+        bufs.push(buf);
+      });
+      process.stdin.on('end', () => {
+        const json = Buffer.concat(bufs).toString('utf8');
+        console.log(jsonToGo(json).go);
+      });
+    }
+    else {
+      process.stdin.on('data', (buf) => {
+        const json = buf.toString('utf8');
+        console.log(jsonToGo(json).go);
+      });
+    }
+  }
+  else {
+    module.exports = jsonToGo;
+  }
+}

src/tools/json-to-go/json-to-go.vue

@@ -0,0 +1,50 @@
+<script setup lang="ts">
+import JSON5 from 'json5';
+import { jsonToGo } from './json-to-go.service';
+import type { UseValidationRule } from '@/composable/validation';
+import TextareaCopyable from '@/components/TextareaCopyable.vue';
+
+const { t } = useI18n();
+const definitions = ref(true);
+const omitempty = ref(false);
+const example = ref(false);
+const jsonInput = ref('');
+const goOutput = computed(() => jsonToGo(jsonInput.value, '', !definitions.value, example.value, omitempty.value).go);
+const rules: UseValidationRule<string>[] = [
+  {
+    validator: (v: string) => v === '' || JSON5.parse(v),
+    message: 'Provided JSON is not valid.',
+  },
+];
+</script>
+
+<template>
+  <c-card :title="t('tools.json-to-go.title')">
+    <n-form-item :label="t('tools.json-to-go.definitions')" label-placement="left">
+      <n-switch v-model:value="definitions" />
+    </n-form-item>
+    <n-form-item :label="t('tools.json-to-go.omitempty')" label-placement="left">
+      <n-switch v-model:value="omitempty" />
+    </n-form-item>
+    <n-form-item :label="t('tools.json-to-go.example')" label-placement="left">
+      <n-switch v-model:value="example" />
+    </n-form-item>
+    <c-input-text
+      v-model:value="jsonInput"
+      multiline
+      placeholder="Put your josn string here..."
+      rows="20"
+      label="JSON to GO"
+      :validation-rules="rules"
+      raw-text
+      mb-5
+    />
+  </c-card>
+  <c-card title="You Go String">
+    <TextareaCopyable
+      :value="goOutput"
+      language="json"
+      :follow-height-of="inputElement"
+    />
+  </c-card>
+</template>

src/tools/json-to-go/locales/en.yml

@@ -0,0 +1,7 @@
+tools:
+  json-to-go:
+    title: JSON to Go
+    description: Convert JSON to Go struct
+    definitions: Inline type definitions
+    omitempty: omitempty
+    example: example