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import Ember from 'ember';
import RSVP from 'rsvp';
import {urls} from '../utils/api-urls';
//********************************************************************************
//https://coderwall.com/p/zrlulq/parsing-a-link-header-in-javascript
function unquote(value) {
if (value.charAt(0) == '"' && value.charAt(value.length - 1) == '"') {
return value.substring(1, value.length - 1);
} else {
return value;
}
}
function parseLinkHeader(header) {
if(!header) {return {}}
var linkexp = /<[^>]*>\s*(\s*;\s*[^\(\)<>@,;:"\/\[\]\?={} \t]+=(([^\(\)<>@,;:"\/\[\]\?={} \t]+)|("[^"]*")))*(,|$)/g;
var paramexp = /[^\(\)<>@,;:"\/\[\]\?={} \t]+=(([^\(\)<>@,;:"\/\[\]\?={} \t]+)|("[^"]*"))/g;
var matches = header.match(linkexp);
var rels = new Object();
for (let i = 0; i < matches.length; i++) {
var split = matches[i].split('>');
var href = split[0].substring(1);
var ps = split[1];
var link = new Object();
link.href = href;
var s = ps.match(paramexp);
for (let j = 0; j < s.length; j++) {
var p = s[j];
var paramsplit = p.split('=');
var name = paramsplit[0];
link[name] = unquote(paramsplit[1]);
}
if (link.rel != undefined) {
rels[link.rel] = link;
}
}
return rels;
}
//********************************************************************************
export default Ember.Service.extend({
init() {
this.packages = {};
this.files = {};
this.haskellModules = {};
this.definitionSites = {};
this.modulePaths = {};
this.expressions = {};
this.references = {};
this.globalReferences = {};
this.hoogleDocs = {};
},
loadPackage(packageId) {
const packageInfo = this.packages[packageId];
if(packageInfo) {
return new RSVP.Promise((resolve) => {resolve(packageInfo);});
} else {
const url = urls.packageInfoUrl(packageId);
return Ember.$.getJSON(url).then((packageInfo) => {
this.packages[packageId] = packageInfo;
return packageInfo;
});
}
},
loadFile(packageId,filePath) {
const fileId = packageId + "/" + filePath;
const file = this.files[fileId];
if(file) {
return new RSVP.Promise((resolve) => {resolve(file);});
} else {
const url = urls.fileUrl(packageId,filePath);
return Ember.$.get({url:url,dataType:"text"}).then((text) => {
const file = {};
file.text = text;
file.packageId = packageId;
file.isHaskellModule = false;
file.id = filePath;
this.files[fileId] = file;
return file;
});
}
},
loadHaskellModule(packageId,filePath) {
const moduleId = packageId + "/" + filePath ;
const module = this.haskellModules[moduleId];
if(module) {
return new RSVP.Promise((resolve)=>{resolve(module);});
} else {
const url = urls.haskellModuleUrl(packageId,filePath);
return Ember.$.getJSON(url).then((module) => {
module.packageId = packageId;
module.isHaskellModule = true;
this.haskellModules[moduleId] = module;
return module;
});
}
},
loadDefinitionSite(packageId,moduleName,componentId,entity,name) {
const id = packageId + "/"+ componentId + "/" + moduleName + "/" + entity + "/" + name;
const definitionSite = this.definitionSites[id];
if(definitionSite) {
return new RSVP.Promise((resolve)=>{resolve(definitionSite);});
} else {
const url = urls.identifierDefinitionSiteUrl(packageId,moduleName,componentId,entity,name);
return Ember.$.getJSON(url).then((definitionSite) => {
this.definitionSites[id] = definitionSite;
return definitionSite;
});
}
},
loadExpressions(packageId,modulePath,lineStart,columnStart,lineEnd,columnEnd) {
const id = packageId + "/" + encodeURIComponent(modulePath)
+ "/" + lineStart + "/" + columnStart + "/" + lineEnd + "/" + columnEnd;
const exprs = this.expressions[id];
if(exprs) {
return new RSVP.Promise((resolve)=>{resolve(exprs);});
} else {
const url = urls.expressionsUrl(packageId,modulePath,lineStart,columnStart,lineEnd,columnEnd);
return Ember.$.getJSON(url).then((exprs) => {
this.expressions[id] = exprs;
return exprs;
});
}
},
loadFromUrlPaginated(url) {
return Ember.$.getJSON(url).then((items,textStatus,jqXHR) => {
const linkHeaderText = jqXHR.getResponseHeader('Link');
const totalCountHeaderText = jqXHR.getResponseHeader('x-total-count');
const linkHeader = parseLinkHeader(linkHeaderText);
const total = parseInt(totalCountHeaderText);
return {
items:items,
total:total,
linkHeader:linkHeader
};
});
},
loadGlobalReferences(externalId) {
const globalReferences = this.globalReferences[externalId];
if(globalReferences) {
return new RSVP.Promise((resolve) => {resolve(globalReferences);});
} else {
const url = urls.globalReferencesUrl(externalId);
return Ember.$.getJSON(url).then((refs) => {
this.globalReferences[externalId] = refs;
return refs;
});
}
},
loadHoogleDocs(packageId,moduleName,entity,name) {
const id = packageId + "/" + moduleName + "/" + entity + "/" + name;
const hoogleDoc = this.hoogleDocs[id];
if(hoogleDoc) {
return new RSVP.Promise((resolve)=>{resolve(hoogleDoc);});
} else {
const url = urls.hoogleDocsUrl(packageId,moduleName,entity,name);
return Ember.$.getJSON(url).then((hoogleDoc) => {
this.hoogleDocs[id] = hoogleDoc;
return hoogleDoc;
});
}
}
});
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