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{ parse as parseYAML, stringify as stringifyYAML } from \"https://deno.land/std/yaml/mod.ts\";\nimport type { Writer, Reader } from \"jsr:@std/io/types\";\n// import * as jsonMod from \"https://deno.land/std@0.224.0/json/mod.ts\";\n// import * as csv from \"npm:csvtojson\";\n// import { readCSV, readCSVRows, writeCSV } from \"jsr:@vslinko/csv\";\n// import { parse as parseCSV, stringify as stringifyCSV } from \"https://deno.land/std/csv/mod.ts\";\nimport csv from \"npm:csvtojson\";\n// import { CSVtoJSON } from \"https://deno.land/x/data_format_converter@v1.2.0/mod.ts\";\nimport { parse as parseTOML, stringify as stringifyTOML } from \"https://deno.land/std/toml/mod.ts\";\n\ntype DataFormat = 'object' | 'json' | 'yaml' | 'csv' | 'toml';\ntype SelectorType = 'property' | 'index' | 'search' | 'dynamic' | 'append' | 'function';\n\ninterface Selector {\n type: SelectorType;\n value: string | number;\n conditions?: Condition[];\n args?: string[];\n}\n\ninterface Condition {\n property: string;\n operator: string;\n value: any;\n}\n\nclass SelectorParser {\n parse(selectorString: string): Selector[] {\n const selectors: Selector[] = [];\n const parts = this.splitSelector(selectorString);\n\n for (const part of parts) {\n if (part.startsWith('.')) {\n selectors.push(this.parseProperty(part));\n } else if (part.startsWith('[') && part.endsWith(']')) {\n selectors.push(this.parseIndex(part));\n } else if (part.startsWith('(') && part.endsWith(')')) {\n selectors.push(this.parseDynamic(part));\n } else if (part === '[]') {\n selectors.push(this.parseAppend());\n } else if (part.includes('(')) {\n selectors.push(this.parseFunction(part));\n } else {\n // Handle top-level properties without a leading dot\n selectors.push(this.parseProperty(`.${part}`));\n }\n }\n\n return selectors;\n }\n\n private splitSelector(selector: string): string[] {\n const parts: string[] = [];\n let current = '';\n let depth = 0;\n let inQuotes = false;\n\n for (const char of selector) {\n if (char === '\"' && depth === 0) {\n inQuotes = !inQuotes;\n }\n if (!inQuotes) {\n if (char === '(' || char === '[') depth++;\n if (char === ')' || char === ']') depth--;\n }\n if (char === '.' && depth === 0 && !inQuotes && current) {\n parts.push(current);\n current = '';\n } else {\n current += char;\n }\n }\n if (current) parts.push(current);\n\n // If the selector doesn't start with '.', add the first part as is\n if (selector[0] !== '.') {\n return parts;\n }\n\n // Otherwise, add the dot to each part\n return parts.map(part => part.startsWith('.') ? part : `.${part}`);\n }\n\n private parseProperty(part: string): Selector {\n return { type: 'property', value: part.slice(1) };\n }\n\n private parseIndex(part: string): Selector {\n const inner = part.slice(1, -1);\n if (inner === '*') {\n return { type: 'index', value: 'all' };\n }\n const index = parseInt(inner, 10);\n if (isNaN(index)) {\n throw new Error(`Invalid index: ${inner}`);\n }\n return { type: 'index', value: index };\n }\n\n private parseDynamic(part: string): Selector {\n const inner = part.slice(1, -1);\n const [property, operator, value] = inner.split(/\\s*(=|!=|>|<|>=|<=)\\s*/);\n return {\n type: 'dynamic',\n value: property,\n conditions: [{ property, operator, value: this.parseValue(value) }]\n };\n }\n\n private parseAppend(): Selector {\n return { type: 'append', value: 'append' };\n }\n\n private parseFunction(part: string): Selector {\n const [funcName, argsString] = part.split('(');\n const args = argsString.slice(0, -1).split(',').map(arg => arg.trim());\n return { type: 'function', value: funcName, args };\n }\n\n private parseValue(value: string): any {\n if (value === 'true') return true;\n if (value === 'false') return false;\n if (value === 'null') return null;\n if (!isNaN(Number(value))) return Number(value);\n return value.replace(/^[\"']|[\"']$/g, ''); // Remove quotes if present\n }\n}\n\n\ntype FunctionHandler = (data: any, args: string[]) => any;\n\nconst functions: Record = {\n length: (data) => Array.isArray(data) ? data.length : Object.keys(data).length,\n keys: (data) => Object.keys(data),\n values: (data) => Object.values(data),\n sum: (data) => data.reduce((a: number, b: number) => a + b, 0),\n avg: (data) => data.reduce((a: number, b: number) => a + b, 0) / data.length,\n min: (data) => Math.min(...data),\n max: (data) => Math.max(...data),\n join: (data, args) => data.join(args[0] || ','),\n split: (data, args) => data.split(args[0] || ','),\n toUpper: (data) => typeof data === 'string' ? data.toUpperCase() : data,\n toLower: (data) => typeof data === 'string' ? data.toLowerCase() : data,\n};\n\n\nfunction applyFunction(funcName: string, data: any, args: string[] = []): any {\n const func = functions[funcName];\n if (!func) {\n throw new Error(`Unknown function: ${funcName}`);\n }\n\n if (Array.isArray(data)) {\n return data.map(item => func(item, args));\n }\n\n return func(data, args);\n}\n\n\nclass Diesel {\n private data: any;\n private format: DataFormat;\n private selectorParser: SelectorParser;\n private dataReady: Promise;\n constructor(data: string | object, format: DataFormat) {\n this.format = format;\n this.selectorParser = new SelectorParser();\n\n if (typeof data === 'object' || format === 'object') {\n this.data = data;\n this.dataReady = Promise.resolve();\n } else {\n this.dataReady = this.parseData(data, format).then(parsedData => {\n this.data = parsedData;\n }).catch(err => {\n console.error(\"Error parsing data:\", err);\n });\n }\n }\n\n private async parseData(data: string, format: DataFormat): Promise {\n if (data === undefined) {\n throw new Error(\"No data to convert\");\n }\n\n switch (format) {\n case 'json':\n return JSON.parse(data);\n case 'yaml':\n return parseYAML(data);\n case 'csv':\n return await csv().fromString(data)\n case 'toml':\n return parseTOML(data);\n default:\n throw new Error(`Unsupported format: ${format}`);\n }\n }\n\n private async stringifyData(data: any, format: DataFormat): Promise {\n // Function to remove undefined values\n const removeUndefined = (obj: any): any => {\n if (Array.isArray(obj)) {\n return obj.map(removeUndefined).filter(v => v !== undefined);\n } else if (typeof obj === 'object' && obj !== null) {\n return Object.fromEntries(\n Object.entries(obj)\n .map(([k, v]) => [k, removeUndefined(v)])\n .filter(([_, v]) => v !== undefined)\n );\n }\n return obj;\n };\n\n // Remove undefined values from the data\n const cleanData = removeUndefined(data);\n\n switch (format) {\n case 'json':\n return JSON.stringify(cleanData);\n case 'yaml':\n return stringifyYAML(cleanData);\n case 'csv':\n const writer = new StringWriter();\n await writeCSV(writer, cleanData);\n return writer.toString();\n case 'toml':\n return stringifyTOML(cleanData);\n default:\n throw new Error(`Unsupported format: ${format}`);\n }\n }\n\n async select(selectorString: string): Promise {\n await this.dataReady; // Ensure data is ready\n if (!selectorString || selectorString === '') {\n return this.data;\n }\n const selectors = this.selectorParser.parse(selectorString);\n return this.traverseSelectors(this.data, selectors);\n }\n\n put(selectorString: string, value: any): void {\n const selectors = this.selectorParser.parse(selectorString);\n this.data = this.traverseSelectorsForPut(this.data, selectors, value);\n }\n\n delete(selectorString: string): void {\n const selectors = this.selectorParser.parse(selectorString);\n this.data = this.traverseSelectorsForDelete(this.data, selectors);\n }\n\n private traverseSelectors(data: any, selectors: Selector[]): any {\n let current = data;\n\n for (const selector of selectors) {\n if (current === undefined || current === null) return undefined;\n\n switch (selector.type) {\n case 'property':\n current = current[selector.value as string];\n break;\n\n case 'index':\n if (Array.isArray(current)) {\n if (selector.value === 'all') {\n return current.map(item => this.traverseSelectors(item, selectors.slice(1)));\n }\n current = current[selector.value as number];\n }\n break;\n\n\n case 'function':\n // If the function is 'length' and current is an array, apply it directly\n if (selector.value === 'length' && Array.isArray(current)) {\n return current.length;\n }\n // Otherwise, apply the function normally\n current = applyFunction(selector.value as string, current, selector.args || []);\n break;\n\n case 'dynamic':\n current = this.applyDynamicSelector(current, selector);\n break;\n\n case 'append':\n // Append doesn't make sense in a read context\n return undefined;\n }\n }\n\n return current;\n }\n\n\n\n\n private traverseSelectorsForPut(data: any, selectors: Selector[], value: any): any {\n if (selectors.length === 0) return value;\n\n const [currentSelector, ...remainingSelectors] = selectors;\n let result: any;\n\n switch (currentSelector.type) {\n case 'property':\n result = data && typeof data === 'object' ? { ...data } : {};\n result[currentSelector.value as string] = this.traverseSelectorsForPut(\n result[currentSelector.value as string],\n remainingSelectors,\n value\n );\n break;\n case 'index':\n result = Array.isArray(data) ? [...data] : [];\n if (currentSelector.value === 'all') {\n return result.map(item => this.traverseSelectorsForPut(item, remainingSelectors, value));\n }\n result[currentSelector.value as number] = this.traverseSelectorsForPut(\n result[currentSelector.value as number],\n remainingSelectors,\n value\n );\n break;\n case 'dynamic':\n result = Array.isArray(data) ? [...data] : [];\n for (let i = 0; i < result.length; i++) {\n if (this.matchesDynamicConditions(result[i], currentSelector)) {\n result[i] = this.traverseSelectorsForPut(result[i], remainingSelectors, value);\n }\n }\n break;\n case 'append':\n result = Array.isArray(data) ? [...data] : [];\n result.push(this.traverseSelectorsForPut({}, remainingSelectors, value));\n break;\n case 'function':\n throw new Error('Cannot put to a function selector');\n }\n\n return result;\n }\n\n private traverseSelectorsForDelete(data: any, selectors: Selector[]): any {\n if (selectors.length === 0 || data === undefined || data === null) return undefined;\n\n const [currentSelector, ...remainingSelectors] = selectors;\n let result: any;\n\n switch (currentSelector.type) {\n case 'property':\n if (typeof data !== 'object' || data === null) return data;\n result = { ...data };\n if (remainingSelectors.length === 0) {\n delete result[currentSelector.value as string];\n } else {\n result[currentSelector.value as string] = this.traverseSelectorsForDelete(\n data[currentSelector.value as string],\n remainingSelectors\n );\n }\n break;\n case 'index':\n if (!Array.isArray(data)) return data;\n result = [...data];\n if (currentSelector.value === 'all') {\n return result.map(item => this.traverseSelectorsForDelete(item, remainingSelectors));\n }\n if (remainingSelectors.length === 0) {\n result.splice(currentSelector.value as number, 1);\n } else {\n result[currentSelector.value as number] = this.traverseSelectorsForDelete(\n data[currentSelector.value as number],\n remainingSelectors\n );\n }\n break;\n case 'dynamic':\n if (!Array.isArray(data)) return data;\n result = data.filter((item: any) => !this.matchesDynamicConditions(item, currentSelector));\n break;\n case 'append':\n return data;\n case 'function':\n throw new Error('Cannot delete from a function selector');\n }\n\n return result;\n }\n\n private applyDynamicSelector(data: any, selector: Selector): any {\n if (!Array.isArray(data)) {\n return undefined;\n }\n return data.filter(item => this.matchesDynamicConditions(item, selector));\n }\n\n private matchesDynamicConditions(item: any, selector: Selector): boolean {\n return selector.conditions?.every(condition => {\n const itemValue = item[condition.property];\n switch (condition.operator) {\n case '=':\n return itemValue === condition.value;\n case '!=':\n return itemValue !== condition.value;\n case '>':\n return itemValue > condition.value;\n case '<':\n return itemValue < condition.value;\n case '>=':\n return itemValue >= condition.value;\n case '<=':\n return itemValue <= condition.value;\n default:\n throw new Error(`Unknown operator: ${condition.operator}`);\n }\n }) ?? false;\n }\n\n async convert(targetFormat: DataFormat): Promise {\n if (this.data === undefined) {\n return \"undefined\";\n }\n return this.stringifyData(this.data, targetFormat);\n }\n\n async toString(): Promise {\n return this.stringifyData(this.data, this.format);\n }\n}\n\n// Helper classes for CSV parsing/stringifying\nclass StringReader implements Reader {\n private data: string;\n private position: number = 0;\n\n constructor(data: string) {\n this.data = data;\n }\n\n read(p: Uint8Array): Promise {\n if (this.position >= this.data.length) {\n return Promise.resolve(null);\n }\n const n = Math.min(p.length, this.data.length - this.position);\n for (let i = 0; i < n; i++) {\n p[i] = this.data.charCodeAt(this.position + i);\n }\n this.position += n;\n return Promise.resolve(n);\n }\n}\n\nclass StringWriter implements Writer {\n private data: string = '';\n\n write(p: Uint8Array): Promise {\n this.data += new TextDecoder().decode(p);\n return Promise.resolve(p.length);\n }\n\n toString(): string {\n return this.data;\n }\n}\n\nexport default Diesel;","deleted","label",[113],"e28153e2-2792-11f0-9d52-569c3dd06744","README.md","e2815450-2792-11f0-9d52-569c3dd06744",1,["D",1724091546044],"# Diesel\n\nDiesel is a lightweight data manipulation library inspired by Tom Wright's Dasel, designed for easy querying and transformation of various data formats such as JSON, YAML, CSV, and TOML. It allows users to select, update, and delete data using a simple selector syntax.\n\nHeavily adapted from https://github.com/TomWright/dasel\n\n## Features\n\n- **Multi-format Support**: Works with JSON, YAML, CSV, and TOML.\n- **Dynamic Selectors**: Use conditions to filter data dynamically.\n- **Function Support**: Built-in functions for data manipulation (e.g., length, sum, avg).\n- **Easy Integration**: Can be used in both Deno and Val Town environments.\n\n## Usage\n\n```\nimport Diesel from \"https://esm.town/v/yawnxyz/diesel\";\n\nasync function main() {\n const jsonData = `\n {\n \"users\": [\n {\"id\": 1, \"name\": \"Alice\", \"age\": 30},\n {\"id\": 2, \"name\": \"Bob\", \"age\": 25},\n {\"id\": 3, \"name\": \"Charlie\", \"age\": 35}\n ],\n \"settings\": {\n \"theme\": \"dark\",\n \"notifications\": true\n }\n }\n `;****\n\n const diesel = new Diesel(jsonData, 'json');\n try {\n console.log(\"All data:\", await diesel.select(''));\n console.log(\"All users:\", await diesel.select('users'));\n console.log(\"First user's name:\", await diesel.select('users.[0].name'));\n console.log(\"Users over 30:\", await diesel.select('users.(age>30)'));\n \n await diesel.put('settings.theme', 'light');\n console.log(\"Updated settings:\", await diesel.select('settings'));\n \n // await diesel.delete('users.[1]');\n // console.log(\"Users after deletion:\", await diesel.select('users'));\n \n console.log(\"Data in YAML format:\");\n console.log(await diesel.convert('yaml'));\n \n console.log(\"Data in TOML format:\");\n console.log(await diesel.convert('toml'));\n \n console.log(\"Number of users:\", await diesel.select('users.length()'));\n console.log(\"User names in uppercase:\", await diesel.select('users.[*].name.toUpper()'));\n } catch (error) {\n console.error(\"An error occurred:\", error);\n }\n}\n\nmain();\n```\n\n\n\n## Installation\n\nTo use Diesel, simply import it in your Deno project as shown in the usage example.\n\n## License\n\nThis project is licensed under the MIT License.\n\n\nMigrated from folder: Libraries/diesel/diesel",[130],"pulls","forks","envVars",{"_142":50,"_144":50},"connections",{"_142":50,"_143":50},"count","unfilledCount","emptyCount",{"_20":129,"_13":130,"_114":131,"_116":-5,"_117":21,"_118":132,"_119":37,"_22":151,"_29":50,"_122":99,"_124":134,"_126":73,"_127":-5,"_148":152,"_87":153},{"_20":112,"_13":113,"_114":115,"_116":-5,"_117":21,"_118":30,"_119":37,"_22":147,"_29":121,"_122":123,"_124":125,"_126":73,"_127":-5,"_148":149,"_87":150},["D",1732663327892],"children",[],[113],["D",1724091546044],[],[130],["D",1746217226712],{"_11":12,"_85":81},{"_11":12,"_79":-5,"_80":81,"_43":44,"_82":83,"_84":73},{"_29":30,"_13":26,"_20":21,"_27":28,"_31":-5,"_32":-5,"_74":-5,"_75":-5,"_76":-5,"_77":14,"_78":12},"ctx",{"_66":-5,"_107":191,"_192":193,"_194":195,"_196":73,"_197":73,"_198":73,"_199":37,"_200":-5,"_201":-7,"_202":-7,"_203":50,"_204":73,"_205":73,"_206":-5,"_207":73,"_208":73,"_209":73,"_210":-5},"ENV",{"_162":163,"_164":165,"_166":26,"_167":168,"_169":170,"_171":172,"_173":174,"_175":176,"_177":178,"_179":180,"_181":182,"_183":184,"_185":186,"_187":188,"_189":190},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","e87eb04e707cf64e7e532c8e8ec395f209e17f15","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

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