bit-badger/myWebLog
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WIP: conversion to Fluid (#47)

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This commit is contained in:
Daniel J. Summers 2024-08-24 20:47:23 -04:00
parent cc3e41ddc5
commit d047035173
14 changed files with 553 additions and 393 deletions
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64
src/MyWebLog/Caches.fs
View File

@ -180,70 +180,6 @@ module CategoryCache =
}
/// Cache for parsed templates
module TemplateCache =
open System
open System.Text.RegularExpressions
open DotLiquid
/// Cache of parsed templates
let private _cache = ConcurrentDictionary<string, Template> ()
/// Custom include parameter pattern
let private hasInclude = Regex("""{% include_template \"(.*)\" %}""", RegexOptions.None, TimeSpan.FromSeconds 2)
/// Get a template for the given theme and template name
let get (themeId: ThemeId) (templateName: string) (data: IData) = backgroundTask {
let templatePath = $"{themeId}/{templateName}"
match _cache.ContainsKey templatePath with
| true -> return Ok _cache[templatePath]
| false ->
match! data.Theme.FindById themeId with
| Some theme ->
match theme.Templates |> List.tryFind (fun t -> t.Name = templateName) with
| Some template ->
let mutable text = template.Text
let mutable childNotFound = ""
while hasInclude.IsMatch text do
let child = hasInclude.Match text
let childText =
match theme.Templates |> List.tryFind (fun t -> t.Name = child.Groups[1].Value) with
| Some childTemplate -> childTemplate.Text
| None ->
childNotFound <-
if childNotFound = "" then child.Groups[1].Value
else $"{childNotFound}; {child.Groups[1].Value}"
""
text <- text.Replace(child.Value, childText)
if childNotFound <> "" then
let s = if childNotFound.IndexOf ";" >= 0 then "s" else ""
return Error $"Could not find the child template{s} {childNotFound} required by {templateName}"
else
_cache[templatePath] <- Template.Parse(text, SyntaxCompatibility.DotLiquid22)
return Ok _cache[templatePath]
| None ->
return Error $"Theme ID {themeId} does not have a template named {templateName}"
| None -> return Error $"Theme ID {themeId} does not exist"
}
/// Get all theme/template names currently cached
let allNames () =
_cache.Keys |> Seq.sort |> Seq.toList
/// Invalidate all template cache entries for the given theme ID
let invalidateTheme (themeId: ThemeId) =
let keyPrefix = string themeId
_cache.Keys
|> Seq.filter _.StartsWith(keyPrefix)
|> List.ofSeq
|> List.iter (fun key -> match _cache.TryRemove key with _, _ -> ())
/// Remove all entries from the template cache
let empty () =
_cache.Clear()
/// A cache of asset names by themes
module ThemeAssetCache =

28
src/MyWebLog/Handlers/Admin.fs
View File

@ -28,13 +28,13 @@ module Dashboard =
ListedPages = listed
Categories = cats
TopLevelCategories = topCats }
return! adminPage "Dashboard" false next ctx (Views.WebLog.dashboard model)
return! adminPage "Dashboard" next ctx (Views.WebLog.dashboard model)
}
// GET /admin/administration
let admin : HttpHandler = requireAccess Administrator >=> fun next ctx -> task {
let! themes = ctx.Data.Theme.All()
return! adminPage "myWebLog Administration" true next ctx (Views.Admin.dashboard themes)
return! adminPage "myWebLog Administration" next ctx (Views.Admin.dashboard themes)
}
/// Redirect the user to the admin dashboard
@ -71,7 +71,7 @@ module Cache =
let refreshTheme themeId : HttpHandler = requireAccess Administrator >=> fun next ctx -> task {
let data = ctx.Data
if themeId = "all" then
TemplateCache.empty ()
Template.Cache.empty ()
do! ThemeAssetCache.fill data
do! addMessage ctx
{ UserMessage.Success with
@ -79,7 +79,7 @@ module Cache =
else
match! data.Theme.FindById(ThemeId themeId) with
| Some theme ->
TemplateCache.invalidateTheme theme.Id
Template.Cache.invalidateTheme theme.Id
do! ThemeAssetCache.refreshTheme theme.Id data
do! addMessage ctx
{ UserMessage.Success with
@ -98,7 +98,7 @@ module Category =
// GET /admin/categories
let all : HttpHandler = fun next ctx ->
let response = fun next ctx ->
adminPage "Categories" true next ctx (Views.WebLog.categoryList (ctx.Request.Query.ContainsKey "new"))
adminPage "Categories" next ctx (Views.WebLog.categoryList (ctx.Request.Query.ContainsKey "new"))
(withHxPushUrl (ctx.WebLog.RelativeUrl (Permalink "admin/categories")) >=> response) next ctx
// GET /admin/category/{id}/edit
@ -115,7 +115,7 @@ module Category =
| Some (title, cat) ->
return!
Views.WebLog.categoryEdit (EditCategoryModel.FromCategory cat)
|> adminBarePage title true next ctx
|> adminBarePage title next ctx
| None -> return! Error.notFound next ctx
}
@ -167,7 +167,7 @@ module RedirectRules =
// GET /admin/settings/redirect-rules
let all : HttpHandler = fun next ctx ->
adminPage "Redirect Rules" true next ctx (Views.WebLog.redirectList ctx.WebLog.RedirectRules)
adminPage "Redirect Rules" next ctx (Views.WebLog.redirectList ctx.WebLog.RedirectRules)
// GET /admin/settings/redirect-rules/[index]
let edit idx : HttpHandler = fun next ctx ->
@ -182,7 +182,7 @@ module RedirectRules =
Some
("Edit", (Views.WebLog.redirectEdit (EditRedirectRuleModel.FromRule idx (List.item idx rules))))
match titleAndView with
| Some (title, view) -> adminBarePage $"{title} Redirect Rule" true next ctx view
| Some (title, view) -> adminBarePage $"{title} Redirect Rule" next ctx view
| None -> Error.notFound next ctx
/// Update the web log's redirect rules in the database, the request web log, and the web log cache
@ -247,7 +247,7 @@ module TagMapping =
// GET /admin/settings/tag-mappings
let all : HttpHandler = fun next ctx -> task {
let! mappings = ctx.Data.TagMap.FindByWebLog ctx.WebLog.Id
return! adminBarePage "Tag Mapping List" true next ctx (Views.WebLog.tagMapList mappings)
return! adminBarePage "Tag Mapping List" next ctx (Views.WebLog.tagMapList mappings)
}
// GET /admin/settings/tag-mapping/{id}/edit
@ -260,7 +260,7 @@ module TagMapping =
| Some tm ->
return!
Views.WebLog.tagMapEdit (EditTagMapModel.FromMapping tm)
|> adminBarePage (if isNew then "Add Tag Mapping" else $"Mapping for {tm.Tag} Tag") true next ctx
|> adminBarePage (if isNew then "Add Tag Mapping" else $"Mapping for {tm.Tag} Tag") next ctx
| None -> return! Error.notFound next ctx
}
@ -302,12 +302,12 @@ module Theme =
let! themes = ctx.Data.Theme.All ()
return!
Views.Admin.themeList (List.map (DisplayTheme.FromTheme WebLogCache.isThemeInUse) themes)
|> adminBarePage "Themes" true next ctx
|> adminBarePage "Themes" next ctx
}
// GET /admin/theme/new
let add : HttpHandler = requireAccess Administrator >=> fun next ctx ->
adminBarePage "Upload a Theme File" true next ctx Views.Admin.themeUpload
adminBarePage "Upload a Theme File" next ctx Views.Admin.themeUpload
/// Update the name and version for a theme based on the version.txt file, if present
let private updateNameAndVersion (theme: Theme) (zip: ZipArchive) = backgroundTask {
@ -398,7 +398,7 @@ module Theme =
do! themeFile.CopyToAsync stream
let! _ = loadFromZip themeId stream data
do! ThemeAssetCache.refreshTheme themeId data
TemplateCache.invalidateTheme themeId
Template.Cache.invalidateTheme themeId
// Ensure the themes directory exists
let themeDir = Path.Combine(".", "themes")
if not (Directory.Exists themeDir) then Directory.CreateDirectory themeDir |> ignore
@ -464,7 +464,7 @@ module WebLog =
return!
Views.WebLog.webLogSettings
(SettingsModel.FromWebLog ctx.WebLog) themes pages uploads (EditRssModel.FromRssOptions ctx.WebLog.Rss)
|> adminPage "Web Log Settings" true next ctx
|> adminPage "Web Log Settings" next ctx
}
// POST /admin/settings

2
src/MyWebLog/Handlers/Feed.fs
View File

@ -453,7 +453,7 @@ let editCustomFeed feedId : HttpHandler = requireAccess WebLogAdmin >=> fun next
{ Name = string Blog; Value = "Blog" }
]
Views.WebLog.feedEdit (EditCustomFeedModel.FromFeed f) ratings mediums
|> adminPage $"""{if feedId = "new" then "Add" else "Edit"} Custom RSS Feed""" true next ctx
|> adminPage $"""{if feedId = "new" then "Add" else "Edit"} Custom RSS Feed""" next ctx
| None -> Error.notFound next ctx
// POST /admin/settings/rss/save

255
src/MyWebLog/Handlers/Helpers.fs
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@ -19,112 +19,9 @@ type ISession with
| item -> Some (JsonSerializer.Deserialize<'T> item)
/// Keys used in the myWebLog-standard DotLiquid hash
module ViewContext =
/// The anti cross-site request forgery (CSRF) token set to use for form submissions
[<Literal>]
let AntiCsrfTokens = "csrf"
/// The unified application view context
[<Literal>]
let AppViewContext = "app"
/// The categories for this web log
[<Literal>]
let Categories = "categories"
/// The main content of the view
[<Literal>]
let Content = "content"
/// The current page URL
[<Literal>]
let CurrentPage = "current_page"
/// The generator string for the current version of myWebLog
[<Literal>]
let Generator = "generator"
/// The HTML to load htmx from the unpkg CDN
[<Literal>]
let HtmxScript = "htmx_script"
/// Whether the current user has Administrator privileges
[<Literal>]
let IsAdministrator = "is_administrator"
/// Whether the current user has Author (or above) privileges
[<Literal>]
let IsAuthor = "is_author"
/// Whether the current view is displaying a category archive page
[<Literal>]
let IsCategory = "is_category"
/// Whether the current view is displaying the first page of a category archive
[<Literal>]
let IsCategoryHome = "is_category_home"
/// Whether the current user has Editor (or above) privileges
[<Literal>]
let IsEditor = "is_editor"
/// Whether the current view is the home page for the web log
[<Literal>]
let IsHome = "is_home"
/// Whether there is a user logged on
[<Literal>]
let IsLoggedOn = "is_logged_on"
/// Whether the current view is displaying a page
[<Literal>]
let IsPage = "is_page"
/// Whether the current view is displaying a post
[<Literal>]
let IsPost = "is_post"
/// Whether the current view is a tag archive page
[<Literal>]
let IsTag = "is_tag"
/// Whether the current view is the first page of a tag archive
[<Literal>]
let IsTagHome = "is_tag_home"
/// Whether the current user has Web Log Admin (or above) privileges
[<Literal>]
let IsWebLogAdmin = "is_web_log_admin"
/// Messages to be displayed to the user
[<Literal>]
let Messages = "messages"
/// The view model / form for the page
[<Literal>]
let Model = "model"
/// The listed pages for the web log
[<Literal>]
let PageList = "page_list"
/// The title of the page being displayed
[<Literal>]
let PageTitle = "page_title"
/// The slug for category or tag archive pages
[<Literal>]
let Slug = "slug"
/// The ID of the current user
[<Literal>]
let UserId = "user_id"
/// The current web log
[<Literal>]
let WebLog = "web_log"
/// Messages to be displayed to the user
[<Literal>]
let MESSAGES = "messages"
/// The HTTP item key for loading the session
@ -147,36 +44,25 @@ open MyWebLog.ViewModels
/// Add a message to the user's session
let addMessage (ctx: HttpContext) message = task {
do! loadSession ctx
let msg = match ctx.Session.TryGet<UserMessage list> ViewContext.Messages with Some it -> it | None -> []
ctx.Session.Set(ViewContext.Messages, message :: msg)
let msg = match ctx.Session.TryGet<UserMessage list> MESSAGES with Some it -> it | None -> []
ctx.Session.Set(MESSAGES, message :: msg)
}
/// Get any messages from the user's session, removing them in the process
let messages (ctx: HttpContext) = task {
do! loadSession ctx
match ctx.Session.TryGet<UserMessage list> ViewContext.Messages with
match ctx.Session.TryGet<UserMessage list> MESSAGES with
| Some msg ->
ctx.Session.Remove ViewContext.Messages
ctx.Session.Remove MESSAGES
return msg |> (List.rev >> Array.ofList)
| None -> return [||]
}
open MyWebLog
open DotLiquid
/// Shorthand for creating a DotLiquid hash from an anonymous object
let makeHash (values: obj) =
Hash.FromAnonymousObject values
/// Create a hash with the page title filled
let hashForPage (title: string) =
makeHash {| page_title = title |}
/// Add a key to the hash, returning the modified hash
// (note that the hash itself is mutated; this is only used to make it pipeable)
let addToHash key (value: obj) (hash: Hash) =
if hash.ContainsKey key then hash[key] <- value else hash.Add(key, value)
hash
/// Create a view context with the page title filled
let viewCtxForPage title =
{ AppViewContext.Empty with PageTitle = title }
open System.Security.Claims
open Giraffe
@ -194,54 +80,31 @@ let private getCurrentMessages ctx = task {
}
/// Generate the view context for a response
let private generateViewContext pageTitle messages includeCsrf (ctx: HttpContext) =
{ WebLog = ctx.WebLog
UserId = ctx.User.Claims
|> Seq.tryFind (fun claim -> claim.Type = ClaimTypes.NameIdentifier)
|> Option.map (fun claim -> WebLogUserId claim.Value)
PageTitle = pageTitle
Csrf = if includeCsrf then Some ctx.CsrfTokenSet else None
PageList = PageListCache.get ctx
Categories = CategoryCache.get ctx
CurrentPage = ctx.Request.Path.Value[1..]
Messages = messages
Generator = ctx.Generator
HtmxScript = htmxScript
IsAuthor = ctx.HasAccessLevel Author
IsEditor = ctx.HasAccessLevel Editor
IsWebLogAdmin = ctx.HasAccessLevel WebLogAdmin
IsAdministrator = ctx.HasAccessLevel Administrator }
let private generateViewContext messages viewCtx (ctx: HttpContext) =
{ viewCtx with
WebLog = ctx.WebLog
UserId = ctx.User.Claims
|> Seq.tryFind (fun claim -> claim.Type = ClaimTypes.NameIdentifier)
|> Option.map (fun claim -> WebLogUserId claim.Value)
Csrf = Some ctx.CsrfTokenSet
PageList = PageListCache.get ctx
Categories = CategoryCache.get ctx
CurrentPage = ctx.Request.Path.Value[1..]
Messages = messages
Generator = ctx.Generator
HtmxScript = htmxScript
IsAuthor = ctx.HasAccessLevel Author
IsEditor = ctx.HasAccessLevel Editor
IsWebLogAdmin = ctx.HasAccessLevel WebLogAdmin
IsAdministrator = ctx.HasAccessLevel Administrator }
/// Populate the DotLiquid hash with standard information
let addViewContext ctx (hash: Hash) = task {
/// Update the view context with standard information (if it has not been done yet) or updated messages
let updateViewContext ctx viewCtx = task {
let! messages = getCurrentMessages ctx
if hash.ContainsKey ViewContext.AppViewContext then
let oldApp = hash[ViewContext.AppViewContext] :?> AppViewContext
let newApp = { oldApp with Messages = Array.concat [ oldApp.Messages; messages ] }
return
hash
|> addToHash ViewContext.AppViewContext newApp
|> addToHash ViewContext.Messages newApp.Messages
if viewCtx.Generator = "" then
return generateViewContext messages viewCtx ctx
else
let app =
generateViewContext (string hash[ViewContext.PageTitle]) messages
(hash.ContainsKey ViewContext.AntiCsrfTokens) ctx
return
hash
|> addToHash ViewContext.UserId (app.UserId |> Option.map string |> Option.defaultValue "")
|> addToHash ViewContext.WebLog app.WebLog
|> addToHash ViewContext.PageList app.PageList
|> addToHash ViewContext.Categories app.Categories
|> addToHash ViewContext.CurrentPage app.CurrentPage
|> addToHash ViewContext.Messages app.Messages
|> addToHash ViewContext.Generator app.Generator
|> addToHash ViewContext.HtmxScript app.HtmxScript
|> addToHash ViewContext.IsLoggedOn app.IsLoggedOn
|> addToHash ViewContext.IsAuthor app.IsAuthor
|> addToHash ViewContext.IsEditor app.IsEditor
|> addToHash ViewContext.IsWebLogAdmin app.IsWebLogAdmin
|> addToHash ViewContext.IsAdministrator app.IsAdministrator
return { viewCtx with Messages = Array.concat [ viewCtx.Messages; messages ] }
}
/// Is the request from htmx?
@ -311,65 +174,65 @@ module Error =
else ServerErrors.INTERNAL_ERROR message earlyReturn ctx)
/// Render a view for the specified theme, using the specified template, layout, and hash
let viewForTheme themeId template next ctx (hash: Hash) = task {
let! hash = addViewContext ctx hash
/// Render a view for the specified theme, using the specified template, layout, and context
let viewForTheme themeId template next ctx (viewCtx: AppViewContext) = task {
let! updated = updateViewContext ctx viewCtx
// NOTE: DotLiquid does not support {% render %} or {% include %} in its templates, so we will do a 2-pass render;
// the net effect is a "layout" capability similar to Razor or Pug
// NOTE: Although Fluid's view engine support implements layouts and sections, it also relies on the filesystem.
// As we are loading templates from memory or a database, we do a 2-pass render; the first for the content,
// the second for the overall page.
// Render view content...
match! TemplateCache.get themeId template ctx.Data with
match! Template.Cache.get themeId template ctx.Data with
| Ok contentTemplate ->
let _ = addToHash ViewContext.Content (contentTemplate.Render hash) hash
let forLayout = { updated with Content = Template.render contentTemplate updated }
// ...then render that content with its layout
match! TemplateCache.get themeId (if isHtmx ctx then "layout-partial" else "layout") ctx.Data with
| Ok layoutTemplate -> return! htmlString (layoutTemplate.Render hash) next ctx
match! Template.Cache.get themeId (if isHtmx ctx then "layout-partial" else "layout") ctx.Data with
| Ok layoutTemplate -> return! htmlString (Template.render layoutTemplate forLayout) next ctx
| Error message -> return! Error.server message next ctx
| Error message -> return! Error.server message next ctx
}
/// Render a bare view for the specified theme, using the specified template and hash
let bareForTheme themeId template next ctx (hash: Hash) = task {
let! hash = addViewContext ctx hash
/// Render a bare view for the specified theme, using the specified template and context
let bareForTheme themeId template next ctx viewCtx = task {
let! updated = updateViewContext ctx viewCtx
let withContent = task {
if hash.ContainsKey ViewContext.Content then return Ok hash
if updated.Content = "" then
match! Template.Cache.get themeId template ctx.Data with
| Ok contentTemplate -> return Ok { updated with Content = Template.render contentTemplate updated }
| Error message -> return Error message
else
match! TemplateCache.get themeId template ctx.Data with
| Ok contentTemplate -> return Ok(addToHash ViewContext.Content (contentTemplate.Render hash) hash)
| Error message -> return Error message
return Ok viewCtx
}
match! withContent with
| Ok completeHash ->
| Ok completeCtx ->
// Bare templates are rendered with layout-bare
match! TemplateCache.get themeId "layout-bare" ctx.Data with
match! Template.Cache.get themeId "layout-bare" ctx.Data with
| Ok layoutTemplate ->
return!
(messagesToHeaders (hash[ViewContext.Messages] :?> UserMessage array)
>=> htmlString (layoutTemplate.Render completeHash))
(messagesToHeaders completeCtx.Messages >=> htmlString (Template.render layoutTemplate completeCtx))
next ctx
| Error message -> return! Error.server message next ctx
| Error message -> return! Error.server message next ctx
}
/// Return a view for the web log's default theme
let themedView template next ctx hash = task {
let! hash = addViewContext ctx hash
return! viewForTheme (hash[ViewContext.WebLog] :?> WebLog).ThemeId template next ctx hash
let themedView template next (ctx: HttpContext) viewCtx = task {
return! viewForTheme ctx.WebLog.ThemeId template next ctx viewCtx
}
/// Display a page for an admin endpoint
let adminPage pageTitle includeCsrf next ctx (content: AppViewContext -> XmlNode list) = task {
let adminPage pageTitle next ctx (content: AppViewContext -> XmlNode list) = task {
let! messages = getCurrentMessages ctx
let appCtx = generateViewContext pageTitle messages includeCsrf ctx
let appCtx = generateViewContext messages (viewCtxForPage pageTitle) ctx
let layout = if isHtmx ctx then Layout.partial else Layout.full
return! htmlString (layout content appCtx |> RenderView.AsString.htmlDocument) next ctx
}
/// Display a bare page for an admin endpoint
let adminBarePage pageTitle includeCsrf next ctx (content: AppViewContext -> XmlNode list) = task {
let adminBarePage pageTitle next ctx (content: AppViewContext -> XmlNode list) = task {
let! messages = getCurrentMessages ctx
let appCtx = generateViewContext pageTitle messages includeCsrf ctx
let appCtx = generateViewContext messages (viewCtxForPage pageTitle) ctx
return!
( messagesToHeaders appCtx.Messages
>=> htmlString (Layout.bare content appCtx |> RenderView.AsString.htmlDocument)) next ctx

12
src/MyWebLog/Handlers/Page.fs
View File

@ -17,7 +17,7 @@ let all pageNbr : HttpHandler = requireAccess Author >=> fun next ctx -> task {
|> List.ofSeq
return!
Views.Page.pageList displayPages pageNbr (pages.Length > 25)
|> adminPage "Pages" true next ctx
|> adminPage "Pages" next ctx
}
// GET /admin/page/{id}/edit
@ -34,7 +34,7 @@ let edit pgId : HttpHandler = requireAccess Author >=> fun next ctx -> task {
| Some (title, page) when canEdit page.AuthorId ctx ->
let model = EditPageModel.FromPage page
let! templates = templatesForTheme ctx "page"
return! adminPage title true next ctx (Views.Page.pageEdit model templates)
return! adminPage title next ctx (Views.Page.pageEdit model templates)
| Some _ -> return! Error.notAuthorized next ctx
| None -> return! Error.notFound next ctx
}
@ -56,7 +56,7 @@ let editPermalinks pgId : HttpHandler = requireAccess Author >=> fun next ctx ->
return!
ManagePermalinksModel.FromPage pg
|> Views.Helpers.managePermalinks
|> adminPage "Manage Prior Permalinks" true next ctx
|> adminPage "Manage Prior Permalinks" next ctx
| Some _ -> return! Error.notAuthorized next ctx
| None -> return! Error.notFound next ctx
}
@ -84,7 +84,7 @@ let editRevisions pgId : HttpHandler = requireAccess Author >=> fun next ctx ->
return!
ManageRevisionsModel.FromPage pg
|> Views.Helpers.manageRevisions
|> adminPage "Manage Page Revisions" true next ctx
|> adminPage "Manage Page Revisions" next ctx
| Some _ -> return! Error.notAuthorized next ctx
| None -> return! Error.notFound next ctx
}
@ -115,7 +115,7 @@ let private findPageRevision pgId revDate (ctx: HttpContext) = task {
let previewRevision (pgId, revDate) : HttpHandler = requireAccess Author >=> fun next ctx -> task {
match! findPageRevision pgId revDate ctx with
| Some pg, Some rev when canEdit pg.AuthorId ctx ->
return! adminBarePage "" false next ctx (Views.Helpers.commonPreview rev)
return! adminBarePage "" next ctx (Views.Helpers.commonPreview rev)
| Some _, Some _ -> return! Error.notAuthorized next ctx
| None, _ | _, None -> return! Error.notFound next ctx
}
@ -141,7 +141,7 @@ let deleteRevision (pgId, revDate) : HttpHandler = requireAccess Author >=> fun
| Some pg, Some rev when canEdit pg.AuthorId ctx ->
do! ctx.Data.Page.Update { pg with Revisions = pg.Revisions |> List.filter (fun r -> r.AsOf <> rev.AsOf) }
do! addMessage ctx { UserMessage.Success with Message = "Revision deleted successfully" }
return! adminBarePage "" false next ctx (fun _ -> [])
return! adminBarePage "" next ctx (fun _ -> [])
| Some _, Some _ -> return! Error.notAuthorized next ctx
| None, _
| _, None -> return! Error.notFound next ctx

96
src/MyWebLog/Handlers/Post.fs
View File

@ -4,6 +4,7 @@ module MyWebLog.Handlers.Post
open System
open System.Collections.Generic
open MyWebLog
open MyWebLog.Views
/// Parse a slug and page number from an "everything else" URL
let private parseSlugAndPage webLog (slugAndPage: string seq) =
@ -87,30 +88,29 @@ let preparePostList webLog posts listType (url: string) pageNbr perPage (data: I
OlderName = olderPost |> Option.map _.Title
}
return
makeHash {||}
|> addToHash ViewContext.Model model
|> addToHash "tag_mappings" tagMappings
|> addToHash ViewContext.IsPost (match listType with SinglePost -> true | _ -> false)
{ AppViewContext.Empty with
Payload = model
TagMappings = Array.ofList tagMappings
IsPost = (match listType with SinglePost -> true | _ -> false) }
}
open Giraffe
// GET /page/{pageNbr}
let pageOfPosts pageNbr : HttpHandler = fun next ctx -> task {
let count = ctx.WebLog.PostsPerPage
let data = ctx.Data
let! posts = data.Post.FindPageOfPublishedPosts ctx.WebLog.Id pageNbr count
let! hash = preparePostList ctx.WebLog posts PostList "" pageNbr count data
let title =
let count = ctx.WebLog.PostsPerPage
let data = ctx.Data
let! posts = data.Post.FindPageOfPublishedPosts ctx.WebLog.Id pageNbr count
let! viewCtx = preparePostList ctx.WebLog posts PostList "" pageNbr count data
let title =
match pageNbr, ctx.WebLog.DefaultPage with
| 1, "posts" -> None
| _, "posts" -> Some $"Page {pageNbr}"
| _, _ -> Some $"Page {pageNbr} &laquo; Posts"
return!
match title with Some ttl -> addToHash ViewContext.PageTitle ttl hash | None -> hash
|> function
| hash ->
if pageNbr = 1 && ctx.WebLog.DefaultPage = "posts" then addToHash ViewContext.IsHome true hash else hash
{ viewCtx with
PageTitle = defaultArg title viewCtx.PageTitle
IsHome = pageNbr = 1 && ctx.WebLog.DefaultPage = "posts" }
|> themedView "index" next ctx
}
@ -134,14 +134,15 @@ let pageOfCategorizedPosts slugAndPage : HttpHandler = fun next ctx -> task {
match! data.Post.FindPageOfCategorizedPosts webLog.Id (getCategoryIds slug ctx) pageNbr webLog.PostsPerPage
with
| posts when List.length posts > 0 ->
let! hash = preparePostList webLog posts CategoryList cat.Slug pageNbr webLog.PostsPerPage data
let! viewCtx = preparePostList webLog posts CategoryList cat.Slug pageNbr webLog.PostsPerPage data
let pgTitle = if pageNbr = 1 then "" else $""" <small class="archive-pg-nbr">(Page {pageNbr})</small>"""
return!
addToHash ViewContext.PageTitle $"{cat.Name}: Category Archive{pgTitle}" hash
|> addToHash "subtitle" (defaultArg cat.Description "")
|> addToHash ViewContext.IsCategory true
|> addToHash ViewContext.IsCategoryHome (pageNbr = 1)
|> addToHash ViewContext.Slug slug
{ viewCtx with
PageTitle = $"{cat.Name}: Category Archive{pgTitle}"
Subtitle = cat.Description
IsCategory = true
IsCategoryHome = (pageNbr = 1)
Slug = Some slug }
|> themedView "index" next ctx
| _ -> return! Error.notFound next ctx
| None -> return! Error.notFound next ctx
@ -169,13 +170,14 @@ let pageOfTaggedPosts slugAndPage : HttpHandler = fun next ctx -> task {
else
match! data.Post.FindPageOfTaggedPosts webLog.Id tag pageNbr webLog.PostsPerPage with
| posts when List.length posts > 0 ->
let! hash = preparePostList webLog posts TagList rawTag pageNbr webLog.PostsPerPage data
let pgTitle = if pageNbr = 1 then "" else $""" <small class="archive-pg-nbr">(Page {pageNbr})</small>"""
let! viewCtx = preparePostList webLog posts TagList rawTag pageNbr webLog.PostsPerPage data
let pgTitle = if pageNbr = 1 then "" else $" <small class=\"archive-pg-nbr\">(Page {pageNbr})</small>"
return!
addToHash ViewContext.PageTitle $"Posts Tagged &ldquo;{tag}&rdquo;{pgTitle}" hash
|> addToHash ViewContext.IsTag true
|> addToHash ViewContext.IsTagHome (pageNbr = 1)
|> addToHash ViewContext.Slug rawTag
{ viewCtx with
PageTitle = $"Posts Tagged &ldquo;{tag}&rdquo;{pgTitle}"
IsTag = true
IsTagHome = (pageNbr = 1)
Slug = Some rawTag }
|> themedView "index" next ctx
// Other systems use hyphens for spaces; redirect if this is an old tag link
| _ ->
@ -200,9 +202,9 @@ let home : HttpHandler = fun next ctx -> task {
match! ctx.Data.Page.FindById (PageId pageId) webLog.Id with
| Some page ->
return!
hashForPage page.Title
|> addToHash "page" (DisplayPage.FromPage webLog page)
|> addToHash ViewContext.IsHome true
{ viewCtxForPage page.Title with
Payload = DisplayPage.FromPage webLog page
IsHome = true }
|> themedView (defaultArg page.Template "single-page") next ctx
| None -> return! Error.notFound next ctx
}
@ -251,10 +253,10 @@ let chapters (post: Post) : HttpHandler = fun next ctx ->
// GET /admin/posts
// GET /admin/posts/page/{pageNbr}
let all pageNbr : HttpHandler = requireAccess Author >=> fun next ctx -> task {
let data = ctx.Data
let! posts = data.Post.FindPageOfPosts ctx.WebLog.Id pageNbr 25
let! hash = preparePostList ctx.WebLog posts AdminList "" pageNbr 25 data
return! adminPage "Posts" true next ctx (Views.Post.list (hash[ViewContext.Model] :?> PostDisplay))
let data = ctx.Data
let! posts = data.Post.FindPageOfPosts ctx.WebLog.Id pageNbr 25
let! viewCtx = preparePostList ctx.WebLog posts AdminList "" pageNbr 25 data
return! adminPage "Posts" next ctx (Post.list viewCtx.Posts)
}
// GET /admin/post/{id}/edit
@ -278,7 +280,7 @@ let edit postId : HttpHandler = requireAccess Author >=> fun next ctx -> task {
{ Name = string No; Value = "No" }
{ Name = string Clean; Value = "Clean" }
]
return! adminPage title true next ctx (Views.Post.postEdit model templates ratings)
return! adminPage title next ctx (Post.postEdit model templates ratings)
| Some _ -> return! Error.notAuthorized next ctx
| None -> return! Error.notFound next ctx
}
@ -298,8 +300,8 @@ let editPermalinks postId : HttpHandler = requireAccess Author >=> fun next ctx
| Some post when canEdit post.AuthorId ctx ->
return!
ManagePermalinksModel.FromPost post
|> Views.Helpers.managePermalinks
|> adminPage "Manage Prior Permalinks" true next ctx
|> managePermalinks
|> adminPage "Manage Prior Permalinks" next ctx
| Some _ -> return! Error.notAuthorized next ctx
| None -> return! Error.notFound next ctx
}
@ -326,8 +328,8 @@ let editRevisions postId : HttpHandler = requireAccess Author >=> fun next ctx -
| Some post when canEdit post.AuthorId ctx ->
return!
ManageRevisionsModel.FromPost post
|> Views.Helpers.manageRevisions
|> adminPage "Manage Post Revisions" true next ctx
|> manageRevisions
|> adminPage "Manage Post Revisions" next ctx
| Some _ -> return! Error.notAuthorized next ctx
| None -> return! Error.notFound next ctx
}
@ -359,7 +361,7 @@ let private findPostRevision postId revDate (ctx: HttpContext) = task {
let previewRevision (postId, revDate) : HttpHandler = requireAccess Author >=> fun next ctx -> task {
match! findPostRevision postId revDate ctx with
| Some post, Some rev when canEdit post.AuthorId ctx ->
return! adminBarePage "" false next ctx (Views.Helpers.commonPreview rev)
return! adminBarePage "" next ctx (commonPreview rev)
| Some _, Some _ -> return! Error.notAuthorized next ctx
| None, _ | _, None -> return! Error.notFound next ctx
}
@ -385,7 +387,7 @@ let deleteRevision (postId, revDate) : HttpHandler = requireAccess Author >=> fu
| Some post, Some rev when canEdit post.AuthorId ctx ->
do! ctx.Data.Post.Update { post with Revisions = post.Revisions |> List.filter (fun r -> r.AsOf <> rev.AsOf) }
do! addMessage ctx { UserMessage.Success with Message = "Revision deleted successfully" }
return! adminBarePage "" false next ctx (fun _ -> [])
return! adminBarePage "" next ctx (fun _ -> [])
| Some _, Some _ -> return! Error.notAuthorized next ctx
| None, _
| _, None -> return! Error.notFound next ctx
@ -399,8 +401,8 @@ let manageChapters postId : HttpHandler = requireAccess Author >=> fun next ctx
&& Option.isSome post.Episode.Value.Chapters
&& canEdit post.AuthorId ctx ->
return!
Views.Post.chapters false (ManageChaptersModel.Create post)
|> adminPage "Manage Chapters" true next ctx
Post.chapters false (ManageChaptersModel.Create post)
|> adminPage "Manage Chapters" next ctx
| Some _ | None -> return! Error.notFound next ctx
}
@ -419,8 +421,8 @@ let editChapter (postId, index) : HttpHandler = requireAccess Author >=> fun nex
match chapter with
| Some chap ->
return!
Views.Post.chapterEdit (EditChapterModel.FromChapter post.Id index chap)
|> adminBarePage (if index = -1 then "Add a Chapter" else "Edit Chapter") true next ctx
Post.chapterEdit (EditChapterModel.FromChapter post.Id index chap)
|> adminBarePage (if index = -1 then "Add a Chapter" else "Edit Chapter") next ctx
| None -> return! Error.notFound next ctx
| Some _ | None -> return! Error.notFound next ctx
}
@ -447,8 +449,8 @@ let saveChapter (postId, index) : HttpHandler = requireAccess Author >=> fun nex
do! data.Post.Update updatedPost
do! addMessage ctx { UserMessage.Success with Message = "Chapter saved successfully" }
return!
Views.Post.chapterList form.AddAnother (ManageChaptersModel.Create updatedPost)
|> adminBarePage "Manage Chapters" true next ctx
Post.chapterList form.AddAnother (ManageChaptersModel.Create updatedPost)
|> adminBarePage "Manage Chapters" next ctx
with
| ex -> return! Error.server ex.Message next ctx
else return! Error.notFound next ctx
@ -471,8 +473,8 @@ let deleteChapter (postId, index) : HttpHandler = requireAccess Author >=> fun n
do! data.Post.Update updatedPost
do! addMessage ctx { UserMessage.Success with Message = "Chapter deleted successfully" }
return!
Views.Post.chapterList false (ManageChaptersModel.Create updatedPost)
|> adminPage "Manage Chapters" true next ctx
Post.chapterList false (ManageChaptersModel.Create updatedPost)
|> adminPage "Manage Chapters" next ctx
else return! Error.notFound next ctx
| Some _ | None -> return! Error.notFound next ctx
}

11
src/MyWebLog/Handlers/Routes.fs
View File

@ -34,9 +34,8 @@ module CatchAll =
yield Post.chapters post
else
yield fun next ctx ->
Post.preparePostList webLog [ post ] Post.ListType.SinglePost "" 1 1 data
|> await
|> addToHash ViewContext.PageTitle post.Title
{ await (Post.preparePostList webLog [ post ] Post.ListType.SinglePost "" 1 1 data) with
PageTitle = post.Title }
|> themedView (defaultArg post.Template "single-post") next ctx
| None -> ()
// Current page
@ -44,9 +43,9 @@ module CatchAll =
| Some page ->
debug (fun () -> "Found page by permalink")
yield fun next ctx ->
hashForPage page.Title
|> addToHash "page" (DisplayPage.FromPage webLog page)
|> addToHash ViewContext.IsPage true
{ viewCtxForPage page.Title with
Payload = DisplayPage.FromPage webLog page
IsPage = true }
|> themedView (defaultArg page.Template "single-page") next ctx
| None -> ()
// RSS feed

4
src/MyWebLog/Handlers/Upload.fs
View File

@ -120,12 +120,12 @@ let list : HttpHandler = requireAccess Author >=> fun next ctx -> task {
|> Seq.append diskUploads
|> Seq.sortByDescending (fun file -> file.UpdatedOn, file.Path)
|> Views.WebLog.uploadList
|> adminPage "Uploaded Files" true next ctx
|> adminPage "Uploaded Files" next ctx
}
// GET /admin/upload/new
let showNew : HttpHandler = requireAccess Author >=> fun next ctx ->
adminPage "Upload a File" true next ctx Views.WebLog.uploadNew
adminPage "Upload a File" next ctx Views.WebLog.uploadNew
// POST /admin/upload/save
let save : HttpHandler = requireAccess Author >=> fun next ctx -> task {

10
src/MyWebLog/Handlers/User.fs
View File

@ -35,7 +35,7 @@ let logOn returnUrl : HttpHandler = fun next ctx ->
match returnUrl with
| Some _ -> returnUrl
| None -> if ctx.Request.Query.ContainsKey "returnUrl" then Some ctx.Request.Query["returnUrl"].[0] else None
adminPage "Log On" true next ctx (Views.User.logOn { LogOnModel.Empty with ReturnTo = returnTo })
adminPage "Log On" next ctx (Views.User.logOn { LogOnModel.Empty with ReturnTo = returnTo })
open System.Security.Claims
@ -91,12 +91,12 @@ let private goAway : HttpHandler = RequestErrors.BAD_REQUEST "really?"
// GET /admin/settings/users
let all : HttpHandler = fun next ctx -> task {
let! users = ctx.Data.WebLogUser.FindByWebLog ctx.WebLog.Id
return! adminBarePage "User Administration" true next ctx (Views.User.userList users)
return! adminBarePage "User Administration" next ctx (Views.User.userList users)
}
/// Show the edit user page
let private showEdit (model: EditUserModel) : HttpHandler = fun next ctx ->
adminBarePage (if model.IsNew then "Add a New User" else "Edit User") true next ctx (Views.User.edit model)
adminBarePage (if model.IsNew then "Add a New User" else "Edit User") next ctx (Views.User.edit model)
// GET /admin/settings/user/{id}/edit
let edit usrId : HttpHandler = fun next ctx -> task {
@ -139,7 +139,7 @@ let myInfo : HttpHandler = requireAccess Author >=> fun next ctx -> task {
| Some user ->
return!
Views.User.myInfo (EditMyInfoModel.FromUser user) user
|> adminPage "Edit Your Information" true next ctx
|> adminPage "Edit Your Information" next ctx
| None -> return! Error.notFound next ctx
}
@ -164,7 +164,7 @@ let saveMyInfo : HttpHandler = requireAccess Author >=> fun next ctx -> task {
do! addMessage ctx { UserMessage.Error with Message = "Passwords did not match; no updates made" }
return!
Views.User.myInfo { model with NewPassword = ""; NewPasswordConfirm = "" } user
|> adminPage "Edit Your Information" true next ctx
|> adminPage "Edit Your Information" next ctx
| None -> return! Error.notFound next ctx
}

3
src/MyWebLog/MyWebLog.fsproj
View File

@ -9,6 +9,8 @@
<ItemGroup>
<Content Include="appsettings*.json" CopyToOutputDirectory="Always" />
<Compile Include="Caches.fs" />
<Compile Include="ViewContext.fs" />
<Compile Include="Template.fs" />
<Compile Include="Views\Helpers.fs" />
<Compile Include="Views\Admin.fs" />
<Compile Include="Views\Page.fs" />
@ -31,6 +33,7 @@
<ItemGroup>
<PackageReference Include="BitBadger.AspNetCore.CanonicalDomains" Version="1.0.0" />
<PackageReference Include="DotLiquid" Version="2.2.692" />
<PackageReference Include="Fluid.Core" Version="2.11.1" />
<PackageReference Include="Giraffe" Version="6.4.0" />
<PackageReference Include="Giraffe.Htmx" Version="2.0.2" />
<PackageReference Include="Giraffe.ViewEngine.Htmx" Version="2.0.2" />

282
src/MyWebLog/Template.fs Normal file
View File

@ -0,0 +1,282 @@
module MyWebLog.Template
open Fluid
open Fluid.Values
open Giraffe.ViewEngine
open MyWebLog
open MyWebLog.ViewModels
/// Alias for ValueTask
type VTask<'T> = System.Threading.Tasks.ValueTask<'T>
/// Extensions on Fluid's TemplateContext object
type TemplateContext with
/// Get the model of the context as an AppViewContext instance
member this.App =
this.Model.ToObjectValue() :?> AppViewContext
/// Helper functions for filters and tags
[<AutoOpen>]
module private Helpers =
/// Does an asset exist for the current theme?
let assetExists fileName (webLog: WebLog) =
ThemeAssetCache.get webLog.ThemeId |> List.exists (fun it -> it = fileName)
/// Obtain the link from known types
let permalink (item: FluidValue) (linkFunc: Permalink -> string) =
match item.Type with
| FluidValues.String -> Some (item.ToStringValue())
| FluidValues.Object ->
match item.ToObjectValue() with
| :? DisplayPage as page -> Some page.Permalink
| :? PostListItem as post -> Some post.Permalink
| :? Permalink as link -> Some (string link)
| _ -> None
| _ -> None
|> function
| Some link -> linkFunc (Permalink link)
| None -> $"alert('unknown item type {item.Type}')"
/// Generate a link for theme asset (image, stylesheet, script, etc.)
let themeAsset (input: FluidValue) (ctx: TemplateContext) =
let app = ctx.App
app.WebLog.RelativeUrl(Permalink $"themes/{app.WebLog.ThemeId}/{input.ToStringValue()}")
/// Fluid template options customized with myWebLog filters
let options =
let sValue = StringValue >> VTask<FluidValue>
let it = TemplateOptions.Default
it.MemberAccessStrategy.MemberNameStrategy <- MemberNameStrategies.SnakeCase
// A filter to generate an absolute link
it.Filters.AddFilter("absolute_link", fun input _ ctx -> sValue (permalink input ctx.App.WebLog.AbsoluteUrl))
// A filter to generate a link with posts categorized under the given category
it.Filters.AddFilter("category_link",
fun input _ ctx ->
match input.ToObjectValue() with
| :? DisplayCategory as cat -> Some cat.Slug
| :? string as slug -> Some slug
| _ -> None
|> function
| Some slug -> ctx.App.WebLog.RelativeUrl(Permalink $"category/{slug}/")
| None -> $"alert('unknown category object type {input.Type}')"
|> sValue)
// A filter to generate a link that will edit a page
it.Filters.AddFilter("edit_page_link",
fun input _ ctx ->
match input.ToObjectValue() with
| :? DisplayPage as page -> Some page.Id
| :? string as theId -> Some theId
| _ -> None
|> function
| Some pageId -> ctx.App.WebLog.RelativeUrl(Permalink $"admin/page/{pageId}/edit")
| None -> $"alert('unknown page object type {input.Type}')"
|> sValue)
// A filter to generate a link that will edit a post
it.Filters.AddFilter("edit_post_link",
fun input _ ctx ->
match input.ToObjectValue() with
| :? PostListItem as post -> Some post.Id
| :? string as theId -> Some theId
| _ -> None
|> function
| Some postId -> ctx.App.WebLog.RelativeUrl(Permalink $"admin/post/{postId}/edit")
| None -> $"alert('unknown post object type {input.Type}')"
|> sValue)
// A filter to generate nav links, highlighting the active link (starts-with match)
it.Filters.AddFilter("nav_link",
fun input args ctx ->
let app = ctx.App
let extraPath = app.WebLog.ExtraPath
let path = if extraPath = "" then "" else $"{extraPath[1..]}/"
let url = input.ToStringValue()
seq {
"<li class=nav-item><a class=\"nav-link"
if app.CurrentPage.StartsWith $"{path}{url}" then " active"
"\" href=\""
app.WebLog.RelativeUrl(Permalink url)
"\">"
args.At(0).ToStringValue()
"</a>"
}
|> String.concat ""
|> sValue)
// A filter to generate a relative link
it.Filters.AddFilter("relative_link", fun input _ ctx -> sValue (permalink input ctx.App.WebLog.RelativeUrl))
// A filter to generate a link with posts tagged with the given tag
it.Filters.AddFilter("tag_link",
fun input _ ctx ->
let tag = input.ToStringValue()
ctx.App.TagMappings
|> Array.tryFind (fun it -> it.Tag = tag)
|> function
| Some tagMap -> tagMap.UrlValue
| None -> tag.Replace(" ", "+")
|> function tagUrl -> ctx.App.WebLog.RelativeUrl(Permalink $"tag/{tagUrl}/")
|> sValue)
// A filter to generate a link for theme asset (image, stylesheet, script, etc.)
it.Filters.AddFilter("theme_asset", fun input _ ctx -> sValue (themeAsset input ctx))
// A filter to retrieve the value of a meta item from a list
// (shorter than `{% assign item = list | where: "Name", [name] | first %}{{ item.value }}`)
it.Filters.AddFilter("value",
fun input args _ ->
let items = input.ToObjectValue() :?> MetaItem list
let name = args.At(0).ToStringValue()
match items |> List.tryFind (fun it -> it.Name = name) with
| Some item -> item.Value
| None -> $"-- {name} not found --"
|> sValue)
it
/// Fluid parser customized with myWebLog filters and tags
let parser =
// spacer
let s = " "
// Required return for tag delegates
let ok () =
VTask<Fluid.Ast.Completion> Fluid.Ast.Completion.Normal
let it = FluidParser()
// Create various items in the page header based on the state of the page being generated
it.RegisterEmptyTag("page_head",
fun writer encoder context ->
let app = context.App
// let getBool name =
// defaultArg (context.Environments[0].[name] |> Option.ofObj |> Option.map Convert.ToBoolean) false
writer.WriteLine $"""{s}<meta name=generator content="{app.Generator}">"""
// Theme assets
if assetExists "style.css" app.WebLog then
themeAsset (StringValue "style.css") context
|> sprintf "%s<link rel=stylesheet href=\"%s\">" s
|> writer.WriteLine
if assetExists "favicon.ico" app.WebLog then
themeAsset (StringValue "favicon.ico") context
|> sprintf "%s<link rel=icon href=\"%s\">" s
|> writer.WriteLine
// RSS feeds and canonical URLs
let feedLink title url =
let escTitle = System.Web.HttpUtility.HtmlAttributeEncode title
let relUrl = app.WebLog.RelativeUrl(Permalink url)
$"""{s}<link rel=alternate type="application/rss+xml" title="{escTitle}" href="{relUrl}">"""
if app.WebLog.Rss.IsFeedEnabled && app.IsHome then
writer.WriteLine(feedLink app.WebLog.Name app.WebLog.Rss.FeedName)
writer.WriteLine $"""{s}<link rel=canonical href="{app.WebLog.AbsoluteUrl Permalink.Empty}">"""
if app.WebLog.Rss.IsCategoryEnabled && app.IsCategoryHome then
let slug = context.AmbientValues["slug"] :?> string
writer.WriteLine(feedLink app.WebLog.Name $"category/{slug}/{app.WebLog.Rss.FeedName}")
if app.WebLog.Rss.IsTagEnabled && app.IsTagHome then
let slug = context.AmbientValues["slug"] :?> string
writer.WriteLine(feedLink app.WebLog.Name $"tag/{slug}/{app.WebLog.Rss.FeedName}")
if app.IsPost then
let post = (* context.Environments[0].["model"] *) obj() :?> PostDisplay
let url = app.WebLog.AbsoluteUrl(Permalink post.Posts[0].Permalink)
writer.WriteLine $"""{s}<link rel=canonical href="{url}">"""
if app.IsPage then
let page = (* context.Environments[0].["page"] *) obj() :?> DisplayPage
let url = app.WebLog.AbsoluteUrl(Permalink page.Permalink)
writer.WriteLine $"""{s}<link rel=canonical href="{url}">"""
ok ())
// Create various items in the page footer based on the state of the page being generated
it.RegisterEmptyTag("page_foot",
fun writer encoder context ->
let webLog = context.App.WebLog
if webLog.AutoHtmx then
writer.WriteLine $"{s}{RenderView.AsString.htmlNode Htmx.Script.minified}"
if assetExists "script.js" webLog then
themeAsset (StringValue "script.js") context
|> sprintf "%s<script src=\"%s\"></script>" s
|> writer.WriteLine
ok ())
// Create links for a user to log on or off, and a dashboard link if they are logged off
it.RegisterEmptyTag("user_links",
fun writer encoder ctx ->
let app = ctx.App
let link it = app.WebLog.RelativeUrl(Permalink it)
seq {
"""<ul class="navbar-nav flex-grow-1 justify-content-end">"""
match app.IsLoggedOn with
| true ->
$"""<li class=nav-item><a class=nav-link href="{link "admin/dashboard"}">Dashboard</a>"""
$"""<li class=nav-item><a class=nav-link href="{link "user/log-off"}">Log Off</a>"""
| false ->
$"""<li class=nav-item><a class=nav-link href="{link "user/log-on"}">Log On</a>"""
"</ul>"
}
|> Seq.iter writer.WriteLine
ok())
it
/// Cache for parsed templates
module Cache =
open System.Collections.Concurrent
open MyWebLog.Data
/// Cache of parsed templates
let private _cache = ConcurrentDictionary<string, IFluidTemplate> ()
/// Get a template for the given theme and template name
let get (themeId: ThemeId) (templateName: string) (data: IData) = backgroundTask {
let templatePath = $"{themeId}/{templateName}"
match _cache.ContainsKey templatePath with
| true -> return Ok _cache[templatePath]
| false ->
match! data.Theme.FindById themeId with
| Some theme ->
match theme.Templates |> List.tryFind (fun t -> t.Name = templateName) with
| Some template ->
_cache[templatePath] <- parser.Parse(template.Text)
return Ok _cache[templatePath]
| None ->
return Error $"Theme ID {themeId} does not have a template named {templateName}"
| None -> return Error $"Theme ID {themeId} does not exist"
}
/// Get all theme/template names currently cached
let allNames () =
_cache.Keys |> Seq.sort |> Seq.toList
/// Invalidate all template cache entries for the given theme ID
let invalidateTheme (themeId: ThemeId) =
let keyPrefix = string themeId
_cache.Keys
|> Seq.filter _.StartsWith(keyPrefix)
|> List.ofSeq
|> List.iter (fun key -> match _cache.TryRemove key with _, _ -> ())
/// Remove all entries from the template cache
let empty () =
_cache.Clear()
/// Render a template to a string
let render (template: IFluidTemplate) (viewCtx: AppViewContext) =
template.Render(TemplateContext(viewCtx, options, true))

126
src/MyWebLog/ViewContext.fs Normal file
View File

@ -0,0 +1,126 @@
/// View rendering context for myWebLog
[<AutoOpen>]
module MyWebLog.ViewContext
open Microsoft.AspNetCore.Antiforgery
open MyWebLog.ViewModels
/// The rendering context for this application
[<NoComparison; NoEquality>]
type AppViewContext = {
/// The web log for this request
WebLog: WebLog
/// The ID of the current user
UserId: WebLogUserId option
/// The title of the page being rendered
PageTitle: string
/// The subtitle for the page
Subtitle: string option
/// The anti-Cross Site Request Forgery (CSRF) token set to use when rendering a form
Csrf: AntiforgeryTokenSet option
/// The page list for the web log
PageList: DisplayPage array
/// Categories and post counts for the web log
Categories: DisplayCategory array
/// Tag mappings
TagMappings: TagMap array
/// The URL of the page being rendered
CurrentPage: string
/// User messages
Messages: UserMessage array
/// The generator string for the rendered page
Generator: string
/// The payload for this page (see other properties that wrap this one)
Payload: obj
/// The content of a page (wrapped when rendering the layout)
Content: string
/// A string to load the minified htmx script
HtmxScript: string
/// Whether the current user is an author
IsAuthor: bool
/// Whether the current user is an editor (implies author)
IsEditor: bool
/// Whether the current user is a web log administrator (implies author and editor)
IsWebLogAdmin: bool
/// Whether the current user is an installation administrator (implies all web log rights)
IsAdministrator: bool
/// Whether the current page is the home page of the web log
IsHome: bool
/// Whether the current page is a category archive page
IsCategory: bool
/// Whether the current page is a category archive home page
IsCategoryHome: bool
/// Whether the current page is a tag archive page
IsTag: bool
/// Whether the current page is a tag archive home page
IsTagHome: bool
/// Whether the current page is a single post
IsPost: bool
/// Whether the current page is a static page
IsPage: bool
/// The slug for a category or tag
Slug: string option }
with
/// Whether there is a user logged on
member this.IsLoggedOn = Option.isSome this.UserId
member this.Page =
this.Payload :?> DisplayPage
member this.Posts =
this.Payload :?> PostDisplay
/// An empty view context
static member Empty =
{ WebLog = WebLog.Empty
UserId = None
PageTitle = ""
Subtitle = None
Csrf = None
PageList = [||]
Categories = [||]
TagMappings = [||]
CurrentPage = ""
Messages = [||]
Generator = ""
Payload = obj ()
Content = ""
HtmxScript = ""
IsAuthor = false
IsEditor = false
IsWebLogAdmin = false
IsAdministrator = false
IsHome = false
IsCategory = false
IsCategoryHome = false
IsTag = false
IsTagHome = false
IsPost = false
IsPage = false
Slug = None }

2
src/MyWebLog/Views/Admin.fs
View File

@ -8,7 +8,7 @@ open MyWebLog.ViewModels
/// The administrator dashboard
let dashboard (themes: Theme list) app = [
let templates = TemplateCache.allNames ()
let templates = Template.Cache.allNames ()
let cacheBaseUrl = relUrl app "admin/cache/"
let webLogCacheUrl = $"{cacheBaseUrl}web-log/"
let themeCacheUrl = $"{cacheBaseUrl}theme/"

51
src/MyWebLog/Views/Helpers.fs
View File

@ -1,7 +1,6 @@
[<AutoOpen>]
module MyWebLog.Views.Helpers
open Microsoft.AspNetCore.Antiforgery
open Giraffe.ViewEngine
open Giraffe.ViewEngine.Accessibility
open Giraffe.ViewEngine.Htmx
@ -10,56 +9,6 @@ open MyWebLog.ViewModels
open NodaTime
open NodaTime.Text
/// The rendering context for this application
[<NoComparison; NoEquality>]
type AppViewContext = {
/// The web log for this request
WebLog: WebLog
/// The ID of the current user
UserId: WebLogUserId option
/// The title of the page being rendered
PageTitle: string
/// The anti-Cross Site Request Forgery (CSRF) token set to use when rendering a form
Csrf: AntiforgeryTokenSet option
/// The page list for the web log
PageList: DisplayPage array
/// Categories and post counts for the web log
Categories: DisplayCategory array
/// The URL of the page being rendered
CurrentPage: string
/// User messages
Messages: UserMessage array
/// The generator string for the rendered page
Generator: string
/// A string to load the minified htmx script
HtmxScript: string
/// Whether the current user is an author
IsAuthor: bool
/// Whether the current user is an editor (implies author)
IsEditor: bool
/// Whether the current user is a web log administrator (implies author and editor)
IsWebLogAdmin: bool
/// Whether the current user is an installation administrator (implies all web log rights)
IsAdministrator: bool
} with
/// Whether there is a user logged on
member this.IsLoggedOn = Option.isSome this.UserId
/// Create a relative URL for the current web log
let relUrl app =
Permalink >> app.WebLog.RelativeUrl