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search.js
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search.js
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import SearchQueryParser from "searchqueryparser"
export default class Search {
async init() {
this.parser = new SearchQueryParser()
await this.parser.init()
return this;
}
search(query, { last, first, start, end, after, before } = {}) {
let doSearch = {
handleExpression: function (e, fixedStartSet) {
let res1;
let res2;
switch (e.type) {
case "and":
res1 = this.handleExpression(e.e1, fixedStartSet)
res2 = this.handleExpression(e.e2, res1)
return [...new Set(res2)];
case "or":
return [...new Set([...this.handleExpression(e.e1, fixedStartSet), ...this.handleExpression(e.e2, fixedStartSet)])]; //union
case "not":
let notStartSet = fixedStartSet ? fixedStartSet : this.getAllIds()
let exceptSet = this.handleExpression(e.e, notStartSet);
return notStartSet.filter(id => !exceptSet.includes(id))
case "token":
if (e.tag && e.tag.indexOf(".") >= 0) {
let isNotReverse = e.tag.indexOf("..") >= 0 ? true : false;
let s = e.tag.split(isNotReverse ? ".." : ".");
let tag = s.pop();
if (!fixedStartSet) {
let curSet = this.handleToken(tag, e.token)
s.reverse().forEach(rel => {
if (isNotReverse)
curSet = curSet.map(id => global.EntityStorage.rels.getRelated(id, rel) || null).filter(id => id !== null).flat()
else
curSet = curSet.map(id => [...global.EntityStorage.rels.getRelatedReverse(id, rel)] || null).filter(id => id !== null).flat()
})
return curSet;
} else {
let curIds;
let newSet = []
let validatedOkIds = new Set();
let validatedNoIds = new Set();
for (let outerId of fixedStartSet) {
curIds = [outerId]
for (let rel of s) {
if (curIds.length > 0) {
let newIds = []
for (let id of curIds) {
if (isNotReverse)
newIds.push([...global.EntityStorage.rels.getRelatedReverse(id, rel)])
else
newIds.push(global.EntityStorage.rels.getRelated(id, rel))
}
curIds = newIds.flat();
} else {
break;
}
}
for (let curId of curIds) {
if (curId && !validatedNoIds.has(curId)) {
if (validatedOkIds.has(curId) || this.handleToken(tag, e.token, [curId]).length > 0) {
newSet.push(outerId)
validatedOkIds.add(curId)
break;
} else {
validatedNoIds.add(curId)
}
}
}
}
return newSet
}
}
return this.handleToken(e.tag, e.token, fixedStartSet)
}
},
handleToken: function (tag, token, fixedStartSet) {
let res;
switch (tag ? tag.toLowerCase() : undefined) {
case "id":
let id = parseInt(token);
if (fixedStartSet)
return fixedStartSet.indexOf(id) >= 0 ? [id] : []
return this.getAllIds().includes(id) ? [id] : []
case "*":
return fixedStartSet || this.getAllIds()
case "tag":
if (fixedStartSet)
return [...global.EntityStorage.tags.getByTag(token)].filter(id => fixedStartSet.includes(id))
return [...global.EntityStorage.tags.getByTag(token)];
case "prop":
res = null;
if (token.indexOf("=^") > 0) {
let [p, v] = token.split("=^")
return (fixedStartSet ? fixedStartSet : this.getAllIds()).filter((id) => (global.EntityStorage.props.getProps(id)[p] || "").toLowerCase().startsWith(v.toLowerCase()))
} else if (token.endsWith("^")) {
let [p, v] = token.slice(0, -1).split("=")
return (fixedStartSet ? fixedStartSet : this.getAllIds()).filter((id) => (global.EntityStorage.props.getProps(id)[p] || "").toLowerCase().endsWith(v.toLowerCase()))
} else if (token.indexOf("=") > 0) {
let [p, v] = token.split("=")
res = [...global.EntityStorage.props.getIdsByProp(p, v)];
} else if (token.indexOf("~") > 0) {
let [p, v] = token.split("~")
if (global.EntityStorage.indices.propcontains)
res = global.EntityStorage.indices.propcontains.word2Ids[v]
else
return (fixedStartSet ? fixedStartSet : this.getAllIds()).filter((id) => ("" + (global.EntityStorage.props.getProps(id)[p] || "")).toLowerCase().indexOf(v.toLowerCase()) >= 0)
} else if (token.indexOf("<") > 0) {
let [p, v] = token.split("<")
return (fixedStartSet ? fixedStartSet : this.getAllIds()).filter((id) => (global.EntityStorage.props.getProps(id)[p] || "") <= v)
} else if (token.indexOf(">") > 0) {
let [p, v] = token.split(">")
return (fixedStartSet ? fixedStartSet : this.getAllIds()).filter((id) => (global.EntityStorage.props.getProps(id)[p] || "") >= v)
} else if (token) {
return (fixedStartSet ? fixedStartSet : this.getAllIds()).filter((id) => global.EntityStorage.props.getProps(id)[token])
} else {
return []
}
return fixedStartSet ? res.filter(id => fixedStartSet.includes(id)) : res;
case "rel":
if (token.indexOf("=") >= 0)
res = [...global.EntityStorage.rels.getRelatedReverse(...token.split("="))]
else
res = [...global.EntityStorage.rels.getRelatedReverse(parseInt(token))]
return fixedStartSet ? res.filter(id => fixedStartSet.includes(id)) : res;
case "revrel":
case "relrev":
if (token.indexOf("=") >= 0)
res = global.EntityStorage.rels.getRelated(...token.split("="))
else
res = global.EntityStorage.rels.getRelated(parseInt(token))
return fixedStartSet ? res.filter(id => fixedStartSet.includes(id)) : res;
case "created":
if (token[0] == "<") {
let v = token.slice(1)
return (fixedStartSet ? fixedStartSet : this.getAllIds()).filter((id) => (global.EntityStorage.history.getFirstEntry(id)?.ts || "9999") <= v)
} else if (token[0] == ">") {
let v = token.slice(1)
return (fixedStartSet ? fixedStartSet : this.getAllIds()).filter((id) => (global.EntityStorage.history.getFirstEntry(id)?.ts || "0000") >= v)
} else {
return (fixedStartSet ? fixedStartSet : this.getAllIds()).filter((id) => (global.EntityStorage.history.getFirstEntry(id)?.ts || "0000").startsWith(token))
}
case "updated":
if (token[0] == "<") {
let v = token.slice(1)
return (fixedStartSet ? fixedStartSet : this.getAllIds()).filter((id) => (global.EntityStorage.history.getLastEntry(id)?.ts || "9999") <= v)
} else if (token[0] == ">") {
let v = token.slice(1)
return (fixedStartSet ? fixedStartSet : this.getAllIds()).filter((id) => (global.EntityStorage.history.getLastEntry(id)?.ts || "0000") >= v)
} else {
return (fixedStartSet ? fixedStartSet : this.getAllIds()).filter((id) => (global.EntityStorage.history.getLastEntry(id)?.ts || "0000").startsWith(token))
}
default:
if (!tag) {
switch (token) {
case "blob":
res = [...global.EntityStorage.blobs.getAllIds()]
return fixedStartSet ? res.filter(id => fixedStartSet.includes(id)) : res;
case "*":
return fixedStartSet || this.getAllIds()
}
}
return []
}
},
getAllIds() {
if (!this.allIds)
this.allIds = [...global.EntityStorage.getAllIds()];
return this.allIds;
}
}
let res;
if (process.env.BENCHMARK === "true") {
console.time(query)
}
if (!query) {
res = []
} else if (query === "*") {
res = [...global.EntityStorage.getAllIds()];
} else {
//query = query.toLowerCase();
let ast = this.parser.parse(query.trim())
res = doSearch.handleExpression(ast);
}
res = res.sort((a, b) => a < b ? -1 : 1)
if (process.env.BENCHMARK === "true") {
console.timeEnd(query)
}
if (first != null && !isNaN(first))
res = res.slice(0, first)
if (last != null && !isNaN(last))
res = res.slice(Math.max(res.length - last, 0))
if ((start != null && !isNaN(start)) || (end != null && !isNaN(end))) {
let starIdx = start || 0
let endIdx = end != null ? end : res.length
res = res.slice(starIdx, endIdx + 1)
}
if (after != null && !isNaN(after))
res = res.filter(id => id > after)
if (before != null && !isNaN(before))
res = res.filter(id => id < before)
return res;
}
}