rekahsoft/blog-rekahsoft-ca
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Added initial implementation of error messages

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Cleans up error reporting when an ajax call fails, and thus
the #page-content div can't be filled. This is accomplished by using
a #status which has a p.message element that can be populated for text
displaying status messages. By adding either .error or .success
to #status causes it to be highlighted as either a error or success message
respectively.

When its the first load of the page, and #page-content hasn't yet been
populated with content, an error message is shown in the #page-content
div.

Removed the /posts/ and /tags/ fallbacks in the generated
manifest.appcache because even when online, ajax calls for invalid URLs
under those paths return the respective fallback page instead of an
error message, and populate the #page-content div with the fallback. So
from this point forward the fact that the website is offline will be
handled from JavaScript.

When a page is not accessible in the application cache and the user is
offline, an error message is displayed using the mechanism mentioned
above.

Signed-off-by: Collin J. Doering <collin.doering@rekahsoft.ca>
This commit is contained in:
Collin J. Doering 2015-01-06 04:08:40 -05:00
parent f0a702f5d4
commit 5bbacb1725
9 changed files with 343 additions and 45 deletions
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28
js/default.js
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@ -43,6 +43,10 @@
//$('.navbar-collapse').collapse('hide');
});
$('#status a.close-button').click(function () {
$(this).parent().slideUp();
});
// Callback for when the inital page has completely loaded (including images, etc..)
$(window).load(function () {
$.address.change(function(event) {
@ -120,8 +124,14 @@
type: 'GET',
dataType: 'html',
beforeSend: function (xhr, settings) {
// Remove loading error from page-content and any status message errors
$('#page-content').removeClass('loading-error');
$('#status').slideUp('normal', function () {
$('#status').removeClass('error').removeClass('success');
});
// Add .loading to #page-content and #nav to facilitate a loading animation
$('#page-content, #nav').removeClass('loading-done').removeClass('loading-error').addClass('loading');
$('#page-content, #nav').removeClass('loading-done').addClass('loading');
console.log('beforeSend a.menuitem');
},
@ -153,12 +163,18 @@
}, 250);
},
error: function (xhr, status) {
/* Remove .loading then add .loading-error to #page-content and #nav to
* stop the loading animation and facilitate a loading error animation
/* Remove .loading from #page-content and #nav to stop the loading
* animation. Then add .loading-error to #page-content if its the sites
* first load (#page-content has class .init). Finally, display an error
* message in #status.
*/
$('#page-content, #nav').removeClass('loading').addClass('loading-error');
console.log('error retrieving page "' + page_href +'": ' + status);
$('#page-content, #nav').removeClass('loading');
if ($('#page-content.init')[0]) {
$('#page-content').addClass('loading-error').html('<p class="container border-box">Error initially loading blog.rekahsoft.ca. Check the url! Given "' + page_href + '"</p>');
} else {
$('#status > p.message').text('Error retrieving page "' + page_href +'": ' + status);
$('#status').addClass('error').slideDown();
}
}
});
}

7
post-offline.haml
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@ -1,7 +0,0 @@
!!! 5
%html
%body
.container
.border-box
%h1 You are currently offline and this post is unaccesable

31
sass/_header.sass
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@ -45,9 +45,6 @@
#nav.loading
@include animation-play-state(running)
#nav.loading-error
// do something
#nav-menu
text-align: center
margin-bottom: 0
@ -99,3 +96,31 @@
@include transform(scale(1.1))
a.rss-icon:active
@include transform(scale(0.9))
#status
display: none
border: 1px solid
border-top: none
border-bottom-right-radius: 5px
border-bottom-left-radius: 5px
background-color: rgb(146, 208, 240)
box-shadow: 2px 5px 5px 2px #888888
padding: 8px
margin-bottom: 1.25em
p.message
display: inline-block
text-align: center
margin-bottom: 0
a.close-button
display: inline-block
position: absolute
right: 10px
height: 25px
#status.error
background-color: #FD6F6F
#status.success
background-color: rgb(136, 211, 136)

13
sass/default.sass
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@ -92,18 +92,17 @@ sub
@include transition(opacity 1s ease-in 0.5s)
opacity: 1
// TODO: this needs work
#page-content.loading-error
//background: url('/images/error-loading.png') no-repeat 50%
//height: 200px
#page-content.loading-error p
background: #fd6f6f url('/images/error-loading.png') no-repeat 50%
height: 200px
font-weight: bold
line-height: 200px
text-align: center
#page-content.init.loading
background: url('/images/init-loading.gif') no-repeat 50%
height: 125px
#page-content.init.loading-error
// do something
#footer-left
padding-left: 1em

19
src/site.hs
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@ -138,29 +138,20 @@ main = do
let randomNum = random stdGen :: (Int, StdGen)
randomStr = show . abs . fst $ randomNum
manifestStart = [ "CACHE MANIFEST"
, "# " ++ randomStr
, "" ]
, "# " ++ randomStr ]
manifestCacheSingles = [ "/index.html"
, "/default.css" ]
paginatedPostsCache = take 2 $ map (\(n,_) -> "/pages/blog" ++ (show n) ++ ".html") $ toList $ paginateMap paginatedPosts
tagsCache = concatMap (\(t,ids) -> take 2 $ ["/tags/" ++ t ++ show n ++ ".html" | n <- [1..length $ paginateEvery numPaginatePages ids]]) $ tagsMap tags
manifestCacheFromIds = filter (not . null) $ fmap (maybe "" ("/"++)) manifestCacheRoutesMaybe
manifestCache = manifestCacheFromIds ++ tagsCache ++ paginatedPostsCache
manifestFallback = [""
, "FALLBACK:"
, "/posts/ /post-offline.html"
, "/tags/ /tags-offline.html"
, "" ]
manifestNetwork = [ "NETWORK:"
, "*"
, "http://*"
, "https://*"
, "" ]
makeItem . unlines $ manifestStart ++ manifestCacheSingles ++ manifestCache ++ manifestFallback ++ manifestNetwork
match "*-offline.haml" $ do
route $ setExtension "html"
compile $ getResourceBody >>= withItemBody (unixFilter "haml" [])
, "https://*" ]
makeItem . unlines $ manifestStart ++ [""] ++
manifestCacheSingles ++ manifestCache ++ [""] ++
manifestNetwork ++ [""]
match "css/**" $ do
route idRoute

7
tags-offline.haml
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@ -1,7 +0,0 @@
!!! 5
%html
%body
.container
.border-box
%h1 You are currently offline and this tag page is unaccesable

5
templates/default.haml
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@ -4,7 +4,6 @@
/[if IE 8] <html class="ie ie8" lang="en">
<!-- [if (gte IE 9)|!(IE)]><!-->
%html.en(manifest='manifest.appcache')
// Work in progress on application cache;
%head
/ Basic Page Needs
%meta(charset="utf-8")
@ -39,6 +38,10 @@
$partial("templates/partials/logo-banner.haml")$
$partial("templates/partials/nav.haml")$
#status.container
%p.message
%a.close-button Close
#page-content.init.loading
%noscript
#noscript-alert.container