97 lines
2.7 KiB
TypeScript
97 lines
2.7 KiB
TypeScript
import {
|
|
collectNodesOfType,
|
|
findNodeOfType,
|
|
replaceNodesMatching,
|
|
} from "@silverbulletmd/common/tree";
|
|
import { lezerToParseTree } from "@silverbulletmd/common/parse_tree";
|
|
import { valueNodeToVal } from "./engine";
|
|
|
|
// @ts-ignore
|
|
import { parser } from "./parse-query";
|
|
|
|
export type Filter = {
|
|
op: string;
|
|
prop: string;
|
|
value: any;
|
|
};
|
|
|
|
export type ParsedQuery = {
|
|
table: string;
|
|
orderBy?: string;
|
|
orderDesc?: boolean;
|
|
limit?: number;
|
|
filter: Filter[];
|
|
select?: string[];
|
|
render?: string;
|
|
};
|
|
|
|
export function parseQuery(query: string): ParsedQuery {
|
|
let n = lezerToParseTree(query, parser.parse(query).topNode);
|
|
// Clean the tree a bit
|
|
replaceNodesMatching(n, (n) => {
|
|
if (!n.type) {
|
|
let trimmed = n.text!.trim();
|
|
if (!trimmed) {
|
|
return null;
|
|
}
|
|
n.text = trimmed;
|
|
}
|
|
});
|
|
|
|
// console.log("Parsed", JSON.stringify(n, null, 2));
|
|
let queryNode = n.children![0];
|
|
let parsedQuery: ParsedQuery = {
|
|
table: queryNode.children![0].children![0].text!,
|
|
filter: [],
|
|
};
|
|
let orderByNode = findNodeOfType(queryNode, "OrderClause");
|
|
if (orderByNode) {
|
|
let nameNode = findNodeOfType(orderByNode, "Name");
|
|
parsedQuery.orderBy = nameNode!.children![0].text!;
|
|
let orderNode = findNodeOfType(orderByNode, "Order");
|
|
parsedQuery.orderDesc = orderNode
|
|
? orderNode.children![0].text! === "desc"
|
|
: false;
|
|
}
|
|
let limitNode = findNodeOfType(queryNode, "LimitClause");
|
|
if (limitNode) {
|
|
let nameNode = findNodeOfType(limitNode, "Number");
|
|
parsedQuery.limit = valueNodeToVal(nameNode!);
|
|
}
|
|
|
|
let filterNodes = collectNodesOfType(queryNode, "FilterExpr");
|
|
for (let filterNode of filterNodes) {
|
|
let val: any = undefined;
|
|
let valNode = filterNode.children![2].children![0];
|
|
val = valueNodeToVal(valNode);
|
|
let f: Filter = {
|
|
prop: filterNode.children![0].children![0].text!,
|
|
op: filterNode.children![1].text!,
|
|
value: val,
|
|
};
|
|
parsedQuery.filter.push(f);
|
|
}
|
|
let selectNode = findNodeOfType(queryNode, "SelectClause");
|
|
if (selectNode) {
|
|
// console.log("Select node", JSON.stringify(selectNode));
|
|
parsedQuery.select = [];
|
|
collectNodesOfType(selectNode, "Name").forEach((t) => {
|
|
parsedQuery.select!.push(t.children![0].text!);
|
|
});
|
|
// let nameNode = findNodeOfType(selectNode, "Number");
|
|
// parsedQuery.limit = +nameNode!.children![0].text!;
|
|
}
|
|
|
|
let renderNode = findNodeOfType(queryNode, "RenderClause");
|
|
if (renderNode) {
|
|
let renderNameNode = findNodeOfType(renderNode, "PageRef");
|
|
if (!renderNameNode) {
|
|
renderNameNode = findNodeOfType(renderNode, "String");
|
|
}
|
|
parsedQuery.render = valueNodeToVal(renderNameNode!);
|
|
}
|
|
|
|
// console.log(JSON.stringify(queryNode, null, 2));
|
|
return parsedQuery;
|
|
}
|