{"id":23383782,"url":"https://github.com/mdwheele/query-language-parser","last_synced_at":"2025-07-20T13:36:44.849Z","repository":{"id":71079299,"uuid":"456783703","full_name":"mdwheele/query-language-parser","owner":"mdwheele","description":"(query-parser:=true AND supports-boolean-operators:=true) OR maintainer:is-fun-guy","archived":false,"fork":false,"pushed_at":"2022-02-08T04:49:56.000Z","size":75,"stargazers_count":2,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"master","last_synced_at":"2025-04-08T09:57:59.764Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":"","language":"JavaScript","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/mdwheele.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2022-02-08T04:35:23.000Z","updated_at":"2023-11-03T05:33:26.000Z","dependencies_parsed_at":null,"dependency_job_id":"0e01e70e-a201-4d01-80f1-1259ac352e71","html_url":"https://github.com/mdwheele/query-language-parser","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/mdwheele/query-language-parser","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdwheele%2Fquery-language-parser","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdwheele%2Fquery-language-parser/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdwheele%2Fquery-language-parser/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdwheele%2Fquery-language-parser/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/mdwheele","download_url":"https://codeload.github.com/mdwheele/query-language-parser/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/mdwheele%2Fquery-language-parser/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":266135014,"owners_count":23881774,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-12-21T22:29:57.651Z","updated_at":"2025-07-20T13:36:44.790Z","avatar_url":"https://github.com/mdwheele.png","language":"JavaScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"# query-language-parser\n\nThis library can be used to build an Abstract Syntax Tree from query language. This AST can then be used to \nfilter a collection of data using either the `SimpleFilterer` interpreter built into the package OR through \nimplementation of your own interpreter!\n\n### Query Language\n\n```js\nconst query = '(type:=fruit AND weight:=0.75) OR (type:=meat AND weight:\u003e1) OR name:=tilapia'\n```\n\n**Grammar**\n\n```\nquery: predicate ((T_AND | T_OR) predicate)*\npredicate: T_ID ':' T_OPERATOR T_ID | '(' query ')'\n```\n\n### Generating an AST \n\n```js\nconst { ast } = require('query-language-parser')\n\nconst root = ast(query)\n```\n\n```\n  ├─ left\n  │  ├─ left\n  │  │  ├─ left\n  │  │  │  ├─ left: type\n  │  │  │  ├─ op: =\n  │  │  │  └─ right: fruit\n  │  │  ├─ op: AND\n  │  │  └─ right\n  │  │     ├─ left: weight\n  │  │     ├─ op: =\n  │  │     └─ right: 0.75\n  │  ├─ op: OR\n  │  └─ right\n  │     ├─ left\n  │     │  ├─ left: type\n  │     │  ├─ op: =\n  │     │  └─ right: meat\n  │     ├─ op: AND\n  │     └─ right\n  │        ├─ left: weight\n  │        ├─ op: \u003e\n  │        └─ right: 1\n  ├─ op: OR\n  └─ right\n      ├─ left: name\n      ├─ op: =\n      └─ right: tilapia\n```\n\n### Filtering Data\n\n```js\nconst { filter } = require('query-language-parser')\n\nconst groceries = [\n  { type: 'fruit', weight: 0.75, name: 'grapefruit' },\n  { type: 'fruit', weight: 0.5, name: 'apple' },\n  { type: 'vegetable', weight: 1.5, name: 'cucumber' },\n  { type: 'vegetable', weight: 0.74, name: 'squash' },\n  { type: 'meat', weight: 0.5, name: 'hamburger' },\n  { type: 'meat', weight: 1.1, name: 'chicken' },\n  { type: 'fish', weight: 2.1, name: 'tilapia' },\n]\n\nfilter(query, groceries)\n```\n\n```\n[\n  { type: 'fruit', weight: 0.75, name: 'grapefruit' },\n  { type: 'meat', weight: 1.1, name: 'chicken' },\n  { type: 'fish', weight: 2.1, name: 'tilapia' }\n]\n```","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmdwheele%2Fquery-language-parser","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmdwheele%2Fquery-language-parser","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmdwheele%2Fquery-language-parser/lists"}