I'm a bit stuck on how to approach this task. I have created a custom message directive (as an element) with various fields in its scope, including the content field which holds text. This text may include URLs (starting with http/https) and hashtags (starting with # and separated by spaces).
Can anyone suggest a recommended method for manipulating $scope.content to convert all links and hashtags into clickable hyperlinks?
When it comes to "transforming into hyperlinks", it may be helpful to break down the content into an array of strings. From there, you can add it to the element in the linking function like so:
link: function($scope, iElm, iAttrs, controller) {
var links = iElem.text().split(",");
for (var i = 0; i < links.length; i++) {
iElem.append("<a href='" + links[i] + "'>" + links[i] + "</a>");
};
$compile(iElm.contents())($scope);
}
Instead of using a generic append function, consider utilizing Underscore's template function:
var linkTemplate = _.template('<a href="<%= link %>"><%= link %></a>');
Then within the loop, execute:
linkTemplate(links[i]);
To simplify the process, one can utilize directives in Angular, specifically leveraging $sce (strict contextual escaping) and html binding.
Below outlines a step-by-step approach:
angular.module('myModule').directive('content', function () {
return {
scope: {
text: '@'
},
link: function (scope, element, attrs) {
var urlRegex = /((https?|ftp):\/\/(-\.)?([^\s\/?\.#-]+\.?)+(\/[^\s]*)?$)/g,
urlReplacer = '<a href="\$1">\$1</a>',
hashtagRegex = /#([0-9A-z_]*[A-z_]+[A-z0-9]*)/g,
hashtagReplacer = '<a href="https://twitter.com/search/?q=%23\$1">#\$1</a>';
scope.$watch('text', function (n) {
if (n && n.length) {
var parsed = n.replace(urlRegex, urlReplacer);
parsed = parsed.replace(hashtagRegex, hashtagReplacer);
element.html(parsed);
}
});
}
};
});
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