diff options
Diffstat (limited to 'forum/forum.ur')
| -rw-r--r-- | forum/forum.ur | 48 |
1 files changed, 38 insertions, 10 deletions
diff --git a/forum/forum.ur b/forum/forum.ur index c43befe..85f3e19 100644 --- a/forum/forum.ur +++ b/forum/forum.ur @@ -26,6 +26,7 @@ style entryList style entryMetadata style entryTitle style entryBody +style voting table entry : { Id : int, References : option int, @@ -40,6 +41,8 @@ table vote : { QuestionId : int, Author : Author.username, Value : Score.score } + CONSTRAINT OneVotePerEntry UNIQUE (QuestionId, Author), + CONSTRAINT RefersToEntry FOREIGN KEY QuestionId REFERENCES entry(Id) (* Like query1', but automatically dereferences the field *) fun queryColumn [tab ::: Name] [field ::: Name] [state ::: Type] @@ -56,27 +59,51 @@ fun getScore (questionId : int) : transaction Score.score = Score.update Score.undecided +fun recordVote (value : Score.score) (entryId : int) _formData : transaction page = + authorOpt <- Author.current; + (* If the user didn't exist, the user should not have been allowed to vote + in the first place. *) + let val author = Author.nameError authorOpt + in + dml (INSERT INTO vote (QuestionId, Author, Value) + VALUES ({[entryId]}, {[author]}, {[value]})); + detail entryId + end + +and upvote entryId _formData = recordVote Score.insightful entryId _formData + + + (***************************** Single questions ******************************) -fun detail (id : int) : transaction page = +and detail (id : int) : transaction page = authorOpt <- Author.current; question <- oneRow1 (SELECT * FROM entry WHERE Entry.Class = {[EntryClass.question]} AND Entry.Id = {[id]}); - answerBlock <- queryX1 (SELECT * FROM entry + score <- getScore id; + answerBlock <- queryX1' (SELECT * FROM entry WHERE Entry.Class = {[EntryClass.answer]} AND Entry.References = {[Some id]}) (fn answer => - <xml><p> - {[answer.Body]} - <span class={entryMetadata}>—{[answer.Author]}</span> - </p></xml>); + score <- getScore answer.Id; + return ( + <xml><p> + {[answer.Body]} + <span class={entryMetadata}>—{[answer.Author]} ({[Score.withUnits score "point"]})</span> + </p></xml>)); return ( Template.generic (Some "Forum") <xml> <div class={content}> <h2>{[question.Title]}</h2> <p>{[question.Body]}</p> - <p class={entryMetadata}>Asked by {[question.Author]}</p> + <p class={entryMetadata}> + Asked by {[question.Author]} ({[Score.withUnits score "point"]}) + </p> + {Author.whenIdentified authorOpt + <xml> + <form class={voting}><submit action={upvote id} value="⬆" /></form> + </xml>} <div>{answerBlock}</div> @@ -85,7 +112,7 @@ fun detail (id : int) : transaction page = <textarea {#Body} class={entryBody} /><br /> Answering as: <select {#Author}> - {Author.toOptionTag authorOpt} + {Author.whenIdentified' authorOpt (fn u => <xml><option>{[u]}</option></xml>)} <option>Anonymous</option> </select> <submit action={reply id} value="Answer" /> @@ -113,7 +140,7 @@ fun prettyPrintQuestion entry : transaction xbody = <xml><li> <h3><a link={detail entry.Id}>{[entry.Title]}</a></h3> {[entry.Body]} - <span class={entryMetadata}>Asked by {[entry.Author]}; score {[score]}</span> + <span class={entryMetadata}>Asked by {[entry.Author]} ({[Score.withUnits score "point"]})</span> </li></xml>) val allQuestions : transaction page = @@ -153,7 +180,8 @@ fun main () : transaction page = <textarea {#Body} class={entryBody} /><br /> Asking as: <select {#Author}> - {Author.toOptionTag askerOpt} + {Author.whenIdentified' askerOpt (fn u => + <xml><option>{[u]}</option></xml>)} <option>Anonymous</option> </select> <submit action={ask} value="Ask" /> |