SDS-Archive/viewer/archive/archiveviewer.js

/*
 * Git HTML Archive Viewer
 * 
 * Benedikt Bieringer <benedikt.b@wwu.de>
 * https://nuserv.uni-muenster.de:8443/bbieringer/statusarchiveviewer
 */

class ArchiveCommit {
    constructor(message, time, sha) {
        this.message = message
        this.time = time
        this.sha = sha
    }
}

function replace_urls(text, url_before, url_after) {
    for(const key of ["src=\""]) {
        segments = text.split(key)
        result_text = segments[0]
        for(const segment of segments.slice(1)) {
            var index = segment.indexOf('"')
            var first = segment.substring(0, index)
            var second = segment.substring(index)
            
            var new_url = url_before + encodeURIComponent(first) + url_after
            
            result_text += key + new_url + second
        }
        
        text = result_text
    }
    
    return text
}

class ArchiveView {
    constructor(dateselector, commitsSelect, content, token, url, project_id, branch, page_path, index) {
        this.token = token
        this.url = url
        this.project_id = project_id
        this.branch = branch
        
        this.dateselector = dateselector
        this.dateselector.value = ""
        this.dateselector.max = new Date().toLocaleDateString('en-ca')
        // Alternative, doesn't allow selecting today in first two hours of day:
        // this.dateselector.max = new Date().toISOString().split("T")[0]
        this.dateselector.addEventListener("input",((event) => this.on_date_selected(event)))
        
        this.commitsSelect = commitsSelect
        this.commitsSelect.addEventListener("input",((event) => this.on_commit_selected(event)))
        
        this.content = content
        
        this.page_path = page_path
        
        this.index = index
    }
    
    add_commits(commits) {
        commits.map(commit => {
            var elem = document.createElement("option")
            elem.innerHTML = commit.message
            elem.value = commit.sha
            this.commitsSelect.appendChild(elem)
        })
    }
    
    on_date_selected(event) {
        if (!event.target.value)
            return
        var page = 1
        var date = event.target.value
        
        // Clean commits list
        this.commitsSelect.innerHTML = ""
        this.commitsSelect.appendChild(document.createElement("option"))
        
        this.load_pages_recursive(page, date)
    }
    
    on_commit_selected(event) {
        var sha = event.target.value
        var url_before = 'https://' + this.url + '/api/v4/projects/' + this.project_id + '/repository/files/' + encodeURIComponent(this.page_path + "/")
        var url_after = '/raw?ref=' + sha + '&private_token=' + this.token
        var url = url_before + encodeURIComponent(this.index) + url_after
        fetch(url)
        .then(response => response.text())
        .then(text => {
            console.log(text)
            var cleaned_text = replace_urls(text, url_before, url_after)
            console.log(cleaned_text)
            
            const blobContent = new Blob([cleaned_text], {type: "text/html"})
            this.content.src = URL.createObjectURL(blobContent)
        })

    }
    
    load_pages_recursive(page, date) {
        var commits_url = 'https://' + this.url + '/api/v4/projects/' + this.project_id + '/repository/commits?ref_name=' + this.branch + '&private_token=' + this.token + "&since="+date+"T00:00&until="+date+"T24:00&per_page=100&page=" + page;
        
        var length_promise = fetch(commits_url)
        .then(response => response.json())
        .then(
            // Translate response to commits
            json => json.map(
                gitlab_commit => new ArchiveCommit(
                    gitlab_commit.message,
                    gitlab_commit.created_at,
                    gitlab_commit.id
                )
            )
        ).then((commits) => {
                // Skip if new date is selected
                if (date != this.dateselector.value) {
                    return 0;
                }
                
                this.add_commits(commits)
                return commits.length
            }
        ).then((length) => {
            if (length > 0) {
                this.load_pages_recursive(page+1, date)
            }
        })
    }
}