aquameta-datum
Version:
Service layer for the Aquameta database API
124 lines (102 loc) • 13 kB
JavaScript
import { fetch } from './fetch.js';
/**
* Fetch query results client-side
* @returns {Promise}
*/
export default async function executeEndpoint(client, query) {
const requestUrl = `/${client.url}/${client.version}/${query.url}`.replace(/\/+/g, '/') // remove duplicate slashes
.replace(/\/$/, ''); // remove tail slash
const queryString = getQueryString(query.args);
const options = {
method: query.method,
credentials: 'same-origin',
headers: {
'Content-Type': 'application/json'
}
};
if (query.data) {
options.body = JSON.stringify(query.data);
}
try {
console.log(`endpoint: trying to fetch ${requestUrl}`, options);
const response = await fetch(queryString ? `${requestUrl}?${queryString}` : requestUrl, options); // Let client deal with status codes
if (client.rawResponse) {
return response;
} else {
return response.json().then(r => {
return r.result.map(({
row
}) => row);
});
}
} catch (error) {
// Log error in collapsed group
console.groupCollapsed(query.method, error.statusCode, error.title);
if ('message' in error) {
console.error(error.message);
}
console.groupEnd();
throw error.title;
}
} // Map the keys of the args object to an array of encoded url components
function getQueryString(args) {
return Object.keys(args).sort().map(argName => argName in methods && methods[argName](args[argName])).filter(Boolean).join('&').replace(/&&/g, '&');
}
const methods = {
where(arg) {
// where: [{ name: 'column_name', op: '=', value: 'value' }]
return asArray(arg).map(w => `where=${urlEncode(w)}`).join('&');
},
order(arg) {
// order_by: [{ column: 'column_name', direction: 'asc|desc' }]
// TODO: random()?
const columnList = asArray(arg).map(col => {
const {
column,
direction = 'asc'
} = col;
return direction !== 'asc' ? `-${column}` : `${column}`;
});
return `order_by=${encodeURIComponent(columnList.join(','))}`;
},
limit(arg) {
// limit: number
const parsedNum = parseInt(arg);
if (!isNaN(parsedNum)) {
return `limit=${parsedNum}`;
} else {
return null;
}
},
offset(arg) {
// offset: number
const parsedNum = parseInt(arg);
if (!isNaN(parsedNum)) {
return `order=${parsedNum}`;
} else {
return null;
}
},
evented() {
return 'session_id';
},
metaData(arg) {
return `meta_data=${urlEncode(arg)}`;
},
args(arg) {
return `args=${urlEncode(arg)}`;
},
exclude(arg) {
return `exclude=${urlEncode(arg)}`;
},
include(arg) {
return `include=${urlEncode(arg)}`;
}
};
function urlEncode(str) {
return encodeURIComponent(JSON.stringify(str));
}
function asArray(arg) {
return arg instanceof Array ? arg : [arg];
}
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`${requestUrl}?${queryString}` : requestUrl,\n      options,\n    );\n\n    // Let client deal with status codes\n    if (client.rawResponse) {\n      return response;\n    } else {\n      return response.json().then(r => {\n        return r.result.map(({row}) => row);\n      });\n    }\n  } catch (error) {\n    // Log error in collapsed group\n    console.groupCollapsed(query.method, error.statusCode, error.title);\n    if ('message' in error) {\n      console.error(error.message);\n    }\n    console.groupEnd();\n    throw error.title;\n  }\n}\n\n// Map the keys of the args object to an array of encoded url components\nfunction getQueryString(args: {[string]: mixed}): string {\n  return Object.keys(args)\n    .sort()\n    .map(argName => argName in methods && methods[argName](args[argName]))\n    .filter(Boolean)\n    .join('&')\n    .replace(/&&/g, '&');\n}\n\ntype WhereArg = {\n  name: string,\n  op: WhereOps,\n  value: any,\n};\ntype OrderArg = {\n  column: string,\n  direction?: string,\n};\nconst methods = {\n  where(arg: WhereArg | Array<WhereArg>): string {\n    // where: [{ name: 'column_name', op: '=', value: 'value' }]\n    return asArray(arg)\n      .map(w => `where=${urlEncode(w)}`)\n      .join('&');\n  },\n  order(arg: OrderArg | Array<OrderArg>): string {\n    // order_by: [{ column: 'column_name', direction: 'asc|desc' }]\n    // TODO: random()?\n    const columnList = asArray(arg).map(col => {\n      const {column, direction = 'asc'} = col;\n      return direction !== 'asc' ? `-${column}` : `${column}`;\n    });\n    return `order_by=${encodeURIComponent(columnList.join(','))}`;\n  },\n  limit(arg: number): string | null {\n    // limit: number\n    const parsedNum = parseInt(arg);\n    if (!isNaN(parsedNum)) {\n      return `limit=${parsedNum}`;\n    } else {\n      return null;\n    }\n  },\n  offset(arg: number): string | null {\n    // offset: number\n    const parsedNum = parseInt(arg);\n    if (!isNaN(parsedNum)) {\n      return `order=${parsedNum}`;\n    } else {\n      return null;\n    }\n  },\n  evented(): string {\n    return 'session_id';\n  },\n  metaData(arg: any): string {\n    return `meta_data=${urlEncode(arg)}`;\n  },\n  args(arg: any): string {\n    return `args=${urlEncode(arg)}`;\n  },\n  exclude(arg: any): string {\n    return `exclude=${urlEncode(arg)}`;\n  },\n  include(arg: any): string {\n    return `include=${urlEncode(arg)}`;\n  },\n};\n\nfunction urlEncode(str: any): string {\n  return encodeURIComponent(JSON.stringify(str));\n}\n\nfunction asArray(arg: any): any {\n  return arg instanceof Array ? arg : [arg];\n}\n"]}