function getLinks()

in extension.ts [142:182]

• 26 lines of code
• 6 McCabe index (conditional complexity)

function getLinks(document: TextDocument): Promise<Link[]> {
    // Return a promise, since this might take a while for large documents
    return new Promise<Link[]>((resolve, reject) => {
        // Create arrays to hold links as we parse them out
        let linksToReturn = new Array<Link>();
        // Get lines in the document
        let lineCount = document.lineCount;
        
        //Loop over the lines in a document
        for(let lineNumber = 0; lineNumber < lineCount; lineNumber++) {
            // Get the text for the current line
            let lineText = document.lineAt(lineNumber);
            // Are there links?
            let links = lineText.text.match(/\[[^\[]+\]\(([^\)]+(\)[a-zA-Z0-9-]*.\w*\)|\)))|\[[a-zA-z0-9_-]+\]:\s*(\S+)/g);
            if(links) {
                // Iterate over the links found on this line
                for(let i = 0; i< links.length; i++) {
                    // Get the URL from each individual link
                    // ([^\)]+) captures inline style link address
                    // (\S+) captures reference style link address
                    var link = links[i].match(/\[[^\[]+\]\(([^\)]+(\)[a-zA-Z0-9-]*.\w+\)|\)))|\[[a-zA-z0-9_-]+\]:\s*(\S+)/);
                    // Figure out which capture contains the address; inline style or reference
                    let address = (link[3] == null) ? link[1].slice(0, -1) : link[3];
                    //Push it to the array
                    linksToReturn.push({
                        text: link[0],
                        address: address,
                        lineText: lineText
                    });
                }
            }
        }
        if(linksToReturn.length > 0) {
            //Return the populated array, which completes the promise.
            resolve(linksToReturn);
        } else {
            //Reject, because we found no links
            reject;
        }
    }).catch();
}